Mailing List Archive: MythTV: Users

Weird HDMI problem

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icicimov at gmail

Apr 2, 2012, 9:34 PM

Post #1 of 24 (1718 views)
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Weird HDMI problem

Hi all,

I have Mythtv 0.23 running on Mythbuntu 10.04 XFCE. The box is connected to
Sony HD TV via HDMI cable and the graphics is ATI HD3200 integrated one. My
problem is with HDMI output, or I think it is since I can't find any other
explanation. When I switch on the TV first and then the Mythtv all is fine.
But the other way around I get a black screen. Same happens if I leave the
Mythtv box idle for some time: when I switch back to it I get black screen.
It is like due to some power savings, I assume on the TV side, the HDMI
gets switched off. The only way to fix this is to unplug the HDMI cable
from the TV and plug it back in (sometimes it takes couple of tries).

I tried connecting keyboard and mouse to try to wake up but it didn't work.
They work but the screen is left black which makes me think it
is definitely HDMI input/output problem. I also have the screen saver
turned off on the box. I've tried switching off dpms too but that didn't
help either. I guess the HDMI output is turned off and the box can't read
the EDID from the TV. Is it the ATI driver doing this or the TV I wonder?

Any idea how to solve this? Any workaround?

Just to mention that I had the same thing happening when I was on Mythtv
0.20 and Mythbuntu 8.04 so its not the OS or mythtv release. Interestingly,
I didn't have the same problem with the previous LG HD TV, it started with
the Sony TV. I have most of the power saving modes disabled or put to
minimum in the TV settings.

jyavenard at gmail

Apr 2, 2012, 10:49 PM

Post #2 of 24 (1659 views)
Permalink

Re: Weird HDMI problem [In reply to]

Hi

On 3 April 2012 14:34, Igor Cicimov <icicimov [at] gmail> wrote:
>
> Any idea how to solve this? Any workaround?
nVidia cards has a CustomEDID option for xorg.conf ; maybe ATI has
something similar.

This would bypass that type of problems
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icicimov at gmail

Apr 3, 2012, 12:00 AM

Post #3 of 24 (1666 views)
Permalink

Re: Weird HDMI problem [In reply to]

On Tue, Apr 3, 2012 at 3:49 PM, Jean-Yves Avenard <jyavenard [at] gmail>wrote:

> Hi
>
> On 3 April 2012 14:34, Igor Cicimov <icicimov [at] gmail> wrote:
> >
> > Any idea how to solve this? Any workaround?
> nVidia cards has a CustomEDID option for xorg.conf ; maybe ATI has
> something similar.
>
> This would bypass that type of problems
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>

I can set some Modlines in the xorg.conf but is that really the only way to
solve this?

jyavenard at gmail

Apr 3, 2012, 12:58 AM

Post #4 of 24 (1655 views)
Permalink

Re: Weird HDMI problem [In reply to]

On 3 April 2012 17:00, Igor Cicimov <icicimov [at] gmail> wrote:
>
> I can set some Modlines in the xorg.conf but is that really the only way to
> solve this?

modeline wouldn't help here...
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linux at thehobsons

Apr 3, 2012, 2:20 AM

Post #5 of 24 (1646 views)
Permalink

Re: Weird HDMI problem [In reply to]

Igor Cicimov wrote:

>When I switch on the TV first and then the Mythtv all is fine. But
>the other way around I get a black screen. Same happens if I leave
>the Mythtv box idle for some time: when I switch back to it I get
>black screen. It is like due to some power savings, I assume on the
>TV side, the HDMI gets switched off.

I have the same issue (0.24, MythBuntu, Samsung TV, Intel chipset)

What I'm guessing is happening is ...

If the TV is not powered up when the <the graphics system starts>*,
then there is no feedback from the TV and so the HDMI port is not
enabled for output - looking in the xorg log, it's clear it's
auto-detecting displays for all the ports. Thus when you switch on
the TV, you get a blank screen because nothing was detected and the
output was not enabled.

* This seems to be not only when the system starts, but also when
waking from (at least some) sleep mode.

I have tried fiddling around with xorg.conf, but not really knowing
what I'm doing it does seem a lot like you need to configure loads of
stuff to add a fixed modeline - and I've never managed to get
anything other than a broken system.

If my TV supported it, I'd be tempted to get an HDMI-CEC adapter and
try re-configuring the system to turn the TV off/on instead of
activating a screen saver. I've disabled all the screen saver options
in the control panel but it still seems to do it.

--
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.
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pjrobinson at metronet

Apr 3, 2012, 5:55 AM

Post #6 of 24 (1637 views)
Permalink

Re: Weird HDMI problem [In reply to]

Have you tried ALT-CNTRL-BACKSPACE? If this is supported, it used to be
'standard' for X-Windows, this can be used to kill the X Server which
will then be auto-restarted, which if the TV is 'on' it might get the
correct data to start. This is not a solution, just a means of finding
out what might be happening.

On 03/04/12 10:20, Simon Hobson wrote:
> Igor Cicimov wrote:
>
>> When I switch on the TV first and then the Mythtv all is fine. But
>> the other way around I get a black screen. Same happens if I leave
>> the Mythtv box idle for some time: when I switch back to it I get
>> black screen. It is like due to some power savings, I assume on the
>> TV side, the HDMI gets switched off.
>
> I have the same issue (0.24, MythBuntu, Samsung TV, Intel chipset)
>
> What I'm guessing is happening is ...
>
> If the TV is not powered up when the <the graphics system starts>*,
> then there is no feedback from the TV and so the HDMI port is not
> enabled for output - looking in the xorg log, it's clear it's
> auto-detecting displays for all the ports. Thus when you switch on the
> TV, you get a blank screen because nothing was detected and the output
> was not enabled.
>
> * This seems to be not only when the system starts, but also when
> waking from (at least some) sleep mode.
>
>
> I have tried fiddling around with xorg.conf, but not really knowing
> what I'm doing it does seem a lot like you need to configure loads of
> stuff to add a fixed modeline - and I've never managed to get anything
> other than a broken system.
>
> If my TV supported it, I'd be tempted to get an HDMI-CEC adapter and
> try re-configuring the system to turn the TV off/on instead of
> activating a screen saver. I've disabled all the screen saver options
> in the control panel but it still seems to do it.
>
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charriglists at bellsouth

Apr 3, 2012, 7:21 AM

Post #7 of 24 (1639 views)
Permalink

Re: Weird HDMI problem [In reply to]

On 4/3/2012 5:20 AM, Simon Hobson wrote:
> Igor Cicimov wrote:
>
>> When I switch on the TV first and then the Mythtv all is fine. But the
>> other way around I get a black screen. Same happens if I leave the
>> Mythtv box idle for some time: when I switch back to it I get black
>> screen. It is like due to some power savings, I assume on the TV side,
>> the HDMI gets switched off.
>
> I have the same issue (0.24, MythBuntu, Samsung TV, Intel chipset)
>
> What I'm guessing is happening is ...
>
> If the TV is not powered up when the <the graphics system starts>*, then
> there is no feedback from the TV and so the HDMI port is not enabled for
> output - looking in the xorg log, it's clear it's auto-detecting
> displays for all the ports. Thus when you switch on the TV, you get a
> blank screen because nothing was detected and the output was not enabled.
>
> * This seems to be not only when the system starts, but also when waking
> from (at least some) sleep mode.
>
>
> I have tried fiddling around with xorg.conf, but not really knowing what
> I'm doing it does seem a lot like you need to configure loads of stuff
> to add a fixed modeline - and I've never managed to get anything other
> than a broken system.
>
> If my TV supported it, I'd be tempted to get an HDMI-CEC adapter and try
> re-configuring the system to turn the TV off/on instead of activating a
> screen saver. I've disabled all the screen saver options in the control
> panel but it still seems to do it.
>

I've had similar problems related to this chicken, egg issue. I even
had a problem with getting the audio over the HDMI cable because of an
errant edid. Both were fixed with the same solution. Extract the edid
from your tv, save it to a file. Instruct xorg to use the file for the
TV info, negating the need to ask the TV directly. If the TV is off
this will return nothing, which will result in a blank screen when you
finally turn on the TV. Detailed instructions can be found here:
http://analogbit.com/fix_nvidia_edid
Luckily for you, you won't have to edit the edid data, recalculate
checksums and the like. I had to do this to strip away the audio
information provided by the TV, which prevented me using the TV the way
I wanted to.
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lvr at softsystem

Apr 3, 2012, 9:28 AM

Post #8 of 24 (1642 views)
Permalink

Re: Weird HDMI problem [In reply to]

On Tue, 2012-04-03 at 14:34 +1000, Igor Cicimov wrote:
> Hi all,
>
>
> I have Mythtv 0.23 running on Mythbuntu 10.04 XFCE. The box is
> connected to Sony HD TV via HDMI cable and the graphics is ATI HD3200
> integrated one. My problem is with HDMI output, or I think it is since
> I can't find any other explanation. When I switch on the TV first and
> then the Mythtv all is fine. But the other way around I get a black
> screen.

This is almost certainly the ATI radeon driver disabling any
disconnected outputs. I had the same problem with an analog TV
connected to TVout. I fixed it by adding this to xorg.conf:

Section "Device"
# copy existing
....
Option "ForceTVOut" "on"
# The above is documented for the radeon driver
# For fglrx use:
Option "NoTV" "no"
EndSection

If this doesn't work then add this to /etc/rc.local

sudo xrandr --output HDMI1 --auto
(Replace HDMI! with the name of your HDMI output found by running xrandr
without any args)

The display should be connected when this is executed or the output will
be disabled.

If you're using the fglrx (Catalyst) driver then try aticonfig and
search for output options.

> Same happens if I leave the Mythtv box idle for some time: when I
> switch back to it I get black screen. It is like due to some power
> savings, I assume on the TV side, the HDMI gets switched off. The only
> way to fix this is to unplug the HDMI cable from the TV and plug it
> back in (sometimes it takes couple of tries).

I found it best to disable DPMS power saving in xorg.conf:

Section "ServerFlags"
Option "BlankTime" "0" # default 10 mins
Option "StandbyTime" "0" # DPMS standby, default 10 mins
Option "SuspendTime" "0" # DPMS suspend, default 10 mins
Option "OffTime" "0" # DPMS off, default 10 mins
EndSection

> I tried connecting keyboard and mouse to try to wake up but it didn't
> work. They work but the screen is left black which makes me think it
> is definitely HDMI input/output problem. I also have the screen saver
> turned off on the box.

Try re-enabling the output with:

xrandr --output HDMI1 --auto

> I've tried switching off dpms too but that didn't help either. I
> guess the HDMI output is turned off and the box can't read the EDID
> from the TV. Is it the ATI driver doing this or the TV I wonder?

I'll bet this is the ATI driver preferring the VGA output.

[snip]

--
Lawrence
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nick.rout at gmail

Apr 3, 2012, 12:38 PM

Post #9 of 24 (1621 views)
Permalink

Re: Weird HDMI problem [In reply to]

On Wed, Apr 4, 2012 at 2:21 AM, Calvin Harrigan
<charriglists [at] bellsouth> wrote:
> On 4/3/2012 5:20 AM, Simon Hobson wrote:
>>
>> Igor Cicimov wrote:
>>
>>> When I switch on the TV first and then the Mythtv all is fine. But the
>>> other way around I get a black screen. Same happens if I leave the
>>> Mythtv box idle for some time: when I switch back to it I get black
>>> screen. It is like due to some power savings, I assume on the TV side,
>>> the HDMI gets switched off.
>>
>>
>> I have the same issue (0.24, MythBuntu, Samsung TV, Intel chipset)
>>
>> What I'm guessing is happening is ...
>>
>> If the TV is not powered up when the <the graphics system starts>*, then
>> there is no feedback from the TV and so the HDMI port is not enabled for
>> output - looking in the xorg log, it's clear it's auto-detecting
>> displays for all the ports. Thus when you switch on the TV, you get a
>> blank screen because nothing was detected and the output was not enabled.
>>
>> * This seems to be not only when the system starts, but also when waking
>> from (at least some) sleep mode.
>>
>>
>> I have tried fiddling around with xorg.conf, but not really knowing what
>> I'm doing it does seem a lot like you need to configure loads of stuff
>> to add a fixed modeline - and I've never managed to get anything other
>> than a broken system.
>>
>> If my TV supported it, I'd be tempted to get an HDMI-CEC adapter and try
>> re-configuring the system to turn the TV off/on instead of activating a
>> screen saver. I've disabled all the screen saver options in the control
>> panel but it still seems to do it.
>>
>
>
> I've had similar problems related to this chicken, egg issue. �I even had a
> problem with getting the audio over the HDMI cable because of an errant
> edid. Both were fixed with the same solution. �Extract the edid from your
> tv, save it to a file. �Instruct xorg to use the file for the TV info,
> negating the need to ask the TV directly. �If the TV is off this will return
> nothing, which will result in a blank screen when you finally turn on the
> TV. �Detailed instructions can be found here:
> http://analogbit.com/fix_nvidia_edid

Only works on nvidia AFAIK

> Luckily for you, you won't have to edit the edid data, recalculate checksums
> and the like. I had to do this to strip away the audio information provided
> by the TV, which prevented me using the TV the way I wanted to.
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
_______________________________________________
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charriglists at bellsouth

Apr 3, 2012, 1:34 PM

Post #10 of 24 (1622 views)
Permalink

Re: Weird HDMI problem [In reply to]

On 4/3/2012 3:38 PM, Nick Rout wrote:
<snip>
>>
>> I've had similar problems related to this chicken, egg issue. I even had a
>> problem with getting the audio over the HDMI cable because of an errant
>> edid. Both were fixed with the same solution. Extract the edid from your
>> tv, save it to a file. Instruct xorg to use the file for the TV info,
>> negating the need to ask the TV directly. If the TV is off this will return
>> nothing, which will result in a blank screen when you finally turn on the
>> TV. Detailed instructions can be found here:
>> http://analogbit.com/fix_nvidia_edid
>
> Only works on nvidia AFAIK
>
>> Luckily for you, you won't have to edit the edid data, recalculate checksums
>> and the like. I had to do this to strip away the audio information provided
>> by the TV, which prevented me using the TV the way I wanted to.
>>
Sorry, I forgot that critical piece of information. You did mention ATI.

Might still be possible:
Which driver are you using? fglrx or open source? The open source ones
seem to work with the custom-edid opiton
http://en.gentoo-wiki.com/wiki/Radeon#Custom_EDID
http://manpages.ubuntu.com/manpages/lucid/man4/radeon.4.html

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icicimov at gmail

Apr 3, 2012, 5:51 PM

Post #11 of 24 (1614 views)
Permalink

Re: Weird HDMI problem [In reply to]

>
> On Wed, Apr 4, 2012 at 6:34 AM, Calvin Harrigan <
> charriglists [at] bellsouth> wrote:

On 4/3/2012 3:38 PM, Nick Rout wrote:
> <snip>
>
>
>>> I've had similar problems related to this chicken, egg issue. I even
>>> had a
>>> problem with getting the audio over the HDMI cable because of an errant
>>> edid. Both were fixed with the same solution. Extract the edid from your
>>> tv, save it to a file. Instruct xorg to use the file for the TV info,
>>> negating the need to ask the TV directly. If the TV is off this will
>>> return
>>> nothing, which will result in a blank screen when you finally turn on the
>>> TV. Detailed instructions can be found here:
>>> http://analogbit.com/fix_**nvidia_edid<http://analogbit.com/fix_nvidia_edid>
>>>
>>
>> Only works on nvidia AFAIK
>>
>> Luckily for you, you won't have to edit the edid data, recalculate
>>> checksums
>>> and the like. I had to do this to strip away the audio information
>>> provided
>>> by the TV, which prevented me using the TV the way I wanted to.
>>>
>>> Sorry, I forgot that critical piece of information. You did mention
> ATI.
>
> Might still be possible:
> Which driver are you using? fglrx or open source? The open source ones
> seem to work with the custom-edid opiton
> http://en.gentoo-wiki.com/**wiki/Radeon#Custom_EDID<http://en.gentoo-wiki.com/wiki/Radeon#Custom_EDID>
> http://manpages.ubuntu.com/**manpages/lucid/man4/radeon.4.**html<http://manpages.ubuntu.com/manpages/lucid/man4/radeon.4.html>
>
>
>
> ______________________________**_________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/**listinfo/mythtv-users<http://www.mythtv.org/mailman/listinfo/mythtv-users>
>

First thanks to everyone for your response and suggestions.

Unfortunately I use fglrx driver which doesn't have the CustomEDID option.
The option is supported by the radeon opensource driver but not by fglrx.
Sorry I missed to mention the fact I have the latest 12.2 Catalist driver
installed (hoping ATI will solve the problem so I keep up to date) which
I'm not sure is better than the radeon one but I get really smooth playback
in Mplayer with gl/gl2 video output so I'm not really ready to switch over.

I can also confirm that including Modline in the xorg.conf doesn't work as
pointed by Jean-Yves.

I found it best to disable DPMS power saving in xorg.conf:
> Section "ServerFlags"
> Option "BlankTime" "0" # default 10 mins
> Option "StandbyTime" "0" # DPMS standby, default 10 mins
> Option "SuspendTime" "0" # DPMS suspend, default 10 mins
> Option "OffTime" "0" # DPMS off, default 10 mins
> EndSection

Lawrence, I find your suggestions very interesting I can see you had
battled this problem before :) I have the ServerFlags section already
included in my xorg.conf but without any success. I have to check if I have
the correct options set as given above though.

This is almost certainly the ATI radeon driver disabling any
> disconnected outputs. I had the same problem with an analog TV
> connected to TVout. I fixed it by adding this to xorg.conf:
> Section "Device"
> # copy existing
> ....
> Option "ForceTVOut" "on"
> # The above is documented for the radeon driver
> # For fglrx use:
> Option "NoTV" "no"
> EndSection

I'm certainly going to try this option!

sudo xrandr --output HDMI1 --auto

This is exactly what I was looking for, a way to probe the HDMI output
without removing/inserting the cable!

Thanks again guys, I'll try the things suggested tonight and report back.

Igor

gary.buhrmaster at gmail

Apr 3, 2012, 6:22 PM

Post #12 of 24 (1615 views)
Permalink

Re: Weird HDMI problem [In reply to]

On Tue, Apr 3, 2012 at 04:34, Igor Cicimov <icicimov [at] gmail> wrote:
....
> Any idea how to solve this? Any workaround?

A rather expensive solution is the DVI Detective:

http://www.gefen.com/kvm/dproduct.jsp?prod_id=4714

It will "fake" the EDID response even if the source is off.
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icicimov at gmail

Apr 3, 2012, 8:37 PM

Post #13 of 24 (1605 views)
Permalink

Re: Weird HDMI problem [In reply to]

>
>
> On Wed, Apr 4, 2012 at 11:22 AM, Gary Buhrmaster <
gary.buhrmaster [at] gmail> wrote:

> On Tue, Apr 3, 2012 at 04:34, Igor Cicimov <icicimov [at] gmail> wrote:
> ....
> > Any idea how to solve this? Any workaround?
>
> A rather expensive solution is the DVI Detective:
>
> http://www.gefen.com/kvm/dproduct.jsp?prod_id=4714
>
> It will "fake" the EDID response even if the source is off.
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>

The open source ones seem to work with the custom-edid opiton
> http://en.gentoo-wiki.com/**wiki/Radeon#Custom_EDID
> <http://en.gentoo-wiki.com/wiki/Radeon#Custom_EDID>
> http://manpages.ubuntu.com/**manpages/lucid/man4/radeon.4.**html<http://manpages.ubuntu.com/manpages/lucid/man4/radeon.4.html>

I wish I could find some detailed description of the fglrx options like the
ones for radeon driver given above ...

gary.buhrmaster at gmail

Apr 4, 2012, 9:42 AM

Post #14 of 24 (1585 views)
Permalink

Re: Weird HDMI problem [In reply to]

On Tue, Apr 3, 2012 at 20:37, Igor Cicimov <icicimov [at] gmail> wrote:
....
> I wish I could find some detailed description of the fglrx options like the
> ones for radeon driver given above ...

AFAIK there is no good documentation. If you run
aticonfig --help
there are a log of configurable options that eventually
get set in xorg.conf, but under different names than
the aticonfig uses, so about all you can do is change
one option at a time using aticonfig and see what the
xorg.conf file looks like (there are some options to
force ports to be always on, and some always off,
and some values of screen sizes and horizontal
and vertical rates that might be able to be set in a
way to force a particular resolution; using the values
from the logs when things work might be a hint).

If you do figure things out, perhaps you should create
an appropriate wiki entry (I have this vague recollection
that there is a linux ati users wiki).

Good luck.

Gary
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icicimov at gmail

Apr 4, 2012, 4:49 PM

Post #15 of 24 (1573 views)
Permalink

Re: Weird HDMI problem [In reply to]

On Thu, Apr 5, 2012 at 2:42 AM, Gary Buhrmaster
<gary.buhrmaster [at] gmail>wrote:

> On Tue, Apr 3, 2012 at 20:37, Igor Cicimov <icicimov [at] gmail> wrote:
> ....
> > I wish I could find some detailed description of the fglrx options like
> the
> > ones for radeon driver given above ...
>
> AFAIK there is no good documentation. If you run
> aticonfig --help
> there are a log of configurable options that eventually
> get set in xorg.conf, but under different names than
> the aticonfig uses, so about all you can do is change
> one option at a time using aticonfig and see what the
> xorg.conf file looks like (there are some options to
> force ports to be always on, and some always off,
> and some values of screen sizes and horizontal
> and vertical rates that might be able to be set in a
> way to force a particular resolution; using the values
> from the logs when things work might be a hint).
>
> If you do figure things out, perhaps you should create
> an appropriate wiki entry (I have this vague recollection
> that there is a linux ati users wiki).
>
> Good luck.
>
> Gary
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>

Just to report that none of the options I tried worked for me. Switching
off the power management deals with screen saver, monitor switching off and
things like that but can't fix the HDMI dead output. Unfortunately the
xrandr command I had biggest hopes for didn't work either.

The former LG TV must had been doing some HDMI wake up or something when
switching from TV to HDMI input. Or kept all outputs under power/active in
all times where is with today's power saving TV's this is not the case. I
guess it's just a bad combination of ATI driver and TV, the driver fails
waking up the HDMI and the TV not helping about this at all.

I also noticed that when switching from HDMI1 where MythTV is hooked on to
HDMI4 where my DVD surround system is connected and back also produces
blank screen.

I'll try to dig out something from aticonfig that might help. Any other
suggestions are welcome.

Thanks,
Igor

phipps-hutton at sky

Apr 5, 2012, 1:48 AM

Post #16 of 24 (1574 views)
Permalink

Re: Weird HDMI problem [In reply to]

Quoting Igor Cicimov <icicimov [at] gmail>:
> The former LG TV must had been doing some HDMI wake up or something when
> switching from TV to HDMI input. Or kept all outputs under power/active in
> all times where is with today's power saving TV's this is not the case. I
> guess it's just a bad combination of ATI driver and TV, the driver fails
> waking up the HDMI and the TV not helping about this at all.

It's a defective TV and it's not power saving that is causing it. The
EDID circuitry should be powered by the device connecting to the TV so
that it works when the TV is off. There are power wires in VGA, DVI
and HDMI specifically for this. The circuitry is very simple,
basically just a tiny EPROM. I would guess that the TV manufacturer
has decided to cut costs by only having one and connecting it up to
the active input rather than have one per input or doing something
smarter. FYI my Sony Bravia does the right thing on HDMI and VGA inputs.

Cheers,
Tim.

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pjrobinson at metronet

Apr 5, 2012, 1:56 AM

Post #17 of 24 (1610 views)
Permalink

Re: HDMI Connection Problem & Marantz SR5002 [In reply to]

I'm getting a 'no screen found' problem on my mythbuntu ION2 system with
built-in nvidia graphics. I've got 2 systems I want to connect to a
Samsung TV via HDMI via a Marantz SR5002 also via HDMI. The SR5002 has 3
HDMI inputs and 1 HDMI output. Computer 1 when connected via SR5002
HDMI-3 port runs perfectly (nvidia 175 driver) as does computer 2
(nvidia 280.13 driver). Connecting computer 1 or 2 via HDM-2 results in
X not running and Xorg.0.log saying nvidia can't find any screens (for
computer 2, computer 1 doesn't say this being an old driver but X
doesn't start). BTW computer 1 runs mythbuntu 8.10 (yes it's old but
it's a 'production' system and just works). Computer 2 runs mythbuntu
11.10, nvidia 280.13. If I boot either computer when connected to
HDMI-2, the X server doesn't start, the log says it can't find a screen
(but computer 2 does display a 640x480 text screen of the boot sequence
but is not complete due to X not starting, I connect in remotely via ssh
to diagnose the problem). If I connect either computer to HDMI-3 and
boot everything is ok. If I then physically disconnect either computer
from HDMI-3 and connect to HDMI-2 then result, everything still works,
ie there is a connection from HDMI-2 through the SR5002 to its HDMI-OUT
and hence to the TV. Question is, is it an nvidia driver problem or the
SR5002? My initial guess was the SR5002 but since booting on HDM-3 and
switch cables to HDM-2 works I'm not convinced, suggesting it's the
nvidia drivers (or both??). I've also discovered that configuring
computer 2's xorg.conf (connected to HDMI-2) to use the EDID obtained
from computer 1 when connected to HDMI-3 results in the X server
starting but no output on the TV, computer 2's screen being viewed over
VNC. One option is to upgrade to nvidia 295.33 (current) but would it
solve the problem? Where is the problem; nvidia or Marantz?

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mikep at randomtraveller

Apr 5, 2012, 3:13 AM

Post #18 of 24 (1568 views)
Permalink

Re: Weird HDMI problem [In reply to]

On 05/04/12 09:48, phipps-hutton [at] sky wrote:
>
> Quoting Igor Cicimov <icicimov [at] gmail>:
>> The former LG TV must had been doing some HDMI wake up or something when
>> switching from TV to HDMI input. Or kept all outputs under power/active in
>> all times where is with today's power saving TV's this is not the case. I
>> guess it's just a bad combination of ATI driver and TV, the driver fails
>> waking up the HDMI and the TV not helping about this at all.
>
> It's a defective TV and it's not power saving that is causing it. The EDID
> circuitry should be powered by the device connecting to the TV so that it works
> when the TV is off. There are power wires in VGA, DVI and HDMI specifically for
> this. The circuitry is very simple, basically just a tiny EPROM. I would guess
> that the TV manufacturer has decided to cut costs by only having one and
> connecting it up to the active input rather than have one per input or doing
> something smarter. FYI my Sony Bravia does the right thing on HDMI and VGA inputs.
>
...which might imply that one solution could be to try with your mythtv
connected to each HDMI input in turn. I have a Hitachi TV with two HDMI inputs
and they are definitely different in operation depending on what's connected
where. In my case, HDMI2 is the only one with an "exact-PC" scale option.

--

Mike Perkins

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mythtv at rtr

Apr 5, 2012, 6:24 AM

Post #19 of 24 (1611 views)
Permalink

Re: HDMI Connection Problem & Marantz SR5002 [In reply to]

On 12-04-05 04:56 AM, PJR wrote:
> I'm getting a 'no screen found' problem on my mythbuntu ION2 system with
> built-in nvidia graphics. I've got 2 systems I want to connect to a
> Samsung TV via HDMI via a Marantz SR5002 also via HDMI. The SR5002 has 3
> HDMI inputs and 1 HDMI output. Computer 1 when connected via SR5002
> HDMI-3 port runs perfectly (nvidia 175 driver) as does computer 2
> (nvidia 280.13 driver). Connecting computer 1 or 2 via HDM-2 results in
> X not running and Xorg.0.log saying nvidia can't find any screens (for

For your ION2 system, there's a relatively easy workaround.
Just hook the TV up so that it is "seen" by the box,
and then extract the EDID information from it (use nvidia-settings).

Then just supply the saved EDID to the driver at each boot,
by issuing these commands (once, ever):

nvidia-xconfig --custom-edid=/path/to/saved/edid_file
nvidia-xconfig --connected-monitor=Monitor0
## "Monitor0" must mach monitor "Identifier" in /etc/X11/xorg.conf

From then on, it shouldn't matter if the TV is plugged in or not,
or on the wrong input, or whatever.

Cheers

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mythtv at rtr

Apr 5, 2012, 6:27 AM

Post #20 of 24 (1568 views)
Permalink

Re: HDMI Connection Problem & Marantz SR5002 [In reply to]

On 12-04-05 09:24 AM, Mark Lord wrote:
> On 12-04-05 04:56 AM, PJR wrote:
>> I'm getting a 'no screen found' problem on my mythbuntu ION2 system with
>> built-in nvidia graphics. I've got 2 systems I want to connect to a
>> Samsung TV via HDMI via a Marantz SR5002 also via HDMI. The SR5002 has 3
>> HDMI inputs and 1 HDMI output. Computer 1 when connected via SR5002
>> HDMI-3 port runs perfectly (nvidia 175 driver) as does computer 2
>> (nvidia 280.13 driver). Connecting computer 1 or 2 via HDM-2 results in
>> X not running and Xorg.0.log saying nvidia can't find any screens (for
>
> For your ION2 system, there's a relatively easy workaround.
> Just hook the TV up so that it is "seen" by the box,
> and then extract the EDID information from it (use nvidia-settings).
>
> Then just supply the saved EDID to the driver at each boot,
> by issuing these commands (once, ever):
>
> nvidia-xconfig --custom-edid=/path/to/saved/edid_file
> nvidia-xconfig --connected-monitor=Monitor0
> ## "Monitor0" must mach monitor "Identifier" in /etc/X11/xorg.conf

Correction (on the first command):

nvidia-xconfig --custom-edid=Monitor0:/path/to/saved/edid_file
nvidia-xconfig --connected-monitor=Monitor0
## "Monitor0" must mach monitor "Identifier" in /etc/X11/xorg.conf
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icicimov at gmail

Apr 9, 2012, 5:31 PM

Post #21 of 24 (1474 views)
Permalink

Re: Weird HDMI problem [In reply to]

On Thu, Apr 5, 2012 at 8:13 PM, Mike Perkins
<mikep [at] randomtraveller>wrote:

> On 05/04/12 09:48, phipps-hutton [at] sky wrote:
>
>>
>> Quoting Igor Cicimov <icicimov [at] gmail>:
>>
>>> The former LG TV must had been doing some HDMI wake up or something when
>>> switching from TV to HDMI input. Or kept all outputs under power/active
>>> in
>>> all times where is with today's power saving TV's this is not the case. I
>>> guess it's just a bad combination of ATI driver and TV, the driver fails
>>> waking up the HDMI and the TV not helping about this at all.
>>>
>>
>> It's a defective TV and it's not power saving that is causing it. The EDID
>> circuitry should be powered by the device connecting to the TV so that it
>> works
>> when the TV is off. There are power wires in VGA, DVI and HDMI
>> specifically for
>> this. The circuitry is very simple, basically just a tiny EPROM. I would
>> guess
>> that the TV manufacturer has decided to cut costs by only having one and
>> connecting it up to the active input rather than have one per input or
>> doing
>> something smarter. FYI my Sony Bravia does the right thing on HDMI and
>> VGA inputs.
>>
>> ...which might imply that one solution could be to try with your mythtv
> connected to each HDMI input in turn. I have a Hitachi TV with two HDMI
> inputs and they are definitely different in operation depending on what's
> connected where. In my case, HDMI2 is the only one with an "exact-PC" scale
> option.
>
> --
>
> Mike Perkins
>
>
> ______________________________**_________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/**listinfo/mythtv-users<http://www.mythtv.org/mailman/listinfo/mythtv-users>
>

Thanks for the suggestion Mike, I tried it but didn't work for me. There
also some lets call them advance settings for the HDMI in the TV (like
power on/off the device connected etc) but, as usual for Sony, they are
supported for Sony equipment only :-(

I tried everything available in the driver and nothing worked so I guess
I'll have to live with it for now (until my next TV upgrade)

pjrobinson at metronet

Apr 11, 2012, 7:19 AM

Post #22 of 24 (1469 views)
Permalink

Re: HDMI Connection Problem & Marantz SR5002 [In reply to]

On 05/04/12 14:27, Mark Lord wrote:
> On 12-04-05 09:24 AM, Mark Lord wrote:
>> On 12-04-05 04:56 AM, PJR wrote:
>>> I'm getting a 'no screen found' problem on my mythbuntu ION2 system with
>>> built-in nvidia graphics. I've got 2 systems I want to connect to a
>>> Samsung TV via HDMI via a Marantz SR5002 also via HDMI. The SR5002 has 3
>>> HDMI inputs and 1 HDMI output. Computer 1 when connected via SR5002
>>> HDMI-3 port runs perfectly (nvidia 175 driver) as does computer 2
>>> (nvidia 280.13 driver). Connecting computer 1 or 2 via HDM-2 results in
>>> X not running and Xorg.0.log saying nvidia can't find any screens (for
>> For your ION2 system, there's a relatively easy workaround.
>> Just hook the TV up so that it is "seen" by the box,
>> and then extract the EDID information from it (use nvidia-settings).
>>
>> Then just supply the saved EDID to the driver at each boot,
>> by issuing these commands (once, ever):
>>
>> nvidia-xconfig --custom-edid=/path/to/saved/edid_file
>> nvidia-xconfig --connected-monitor=Monitor0
>> ## "Monitor0" must mach monitor "Identifier" in /etc/X11/xorg.conf
>
> Correction (on the first command):
>
> nvidia-xconfig --custom-edid=Monitor0:/path/to/saved/edid_file
> nvidia-xconfig --connected-monitor=Monitor0
> ## "Monitor0" must mach monitor "Identifier" in /etc/X11/xorg.conf
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>
Ok, I've HDMI connected the Samsung TV directly to computer 2 and saved
the EDID. I've change xorg.conf to
Option "ConnectedMonitor" "DFP"
Option "UseDisplayDevice" "DFP"
Option "CustomEDID" "DFP-0:/home/pjr/Samsung-TV-DFP-0-edid.bin"

I've rebooted computer 2 with this setup and all is ok.

I then connected computer 1 to SR5002 HDMI3 and computer 2 to HDMI2 and
booted computer 1, all works as before. On booting computer 2 and
switching the SR5002 to HDMI2 the screen displays "No signal" after
reelling through the stnd ubuntu boot log. If I vnc into computer 2
from another machine the normal ubuntu window screen is displayed. I
found that if I didn't include the xorg.conf line:
Option "UseDisplayDevice" "DFP"
then the X server didn't start.

So not much further forward.
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mythtv at rtr

Apr 11, 2012, 7:37 AM

Post #23 of 24 (1460 views)
Permalink

Re: HDMI Connection Problem & Marantz SR5002 [In reply to]

On 12-04-11 10:19 AM, PJR wrote:
..
> Ok, I've HDMI connected the Samsung TV directly to computer 2 and saved
> the EDID. I've change xorg.conf to
> Option "ConnectedMonitor" "DFP"
> Option "UseDisplayDevice" "DFP"
> Option "CustomEDID" "DFP-0:/home/pjr/Samsung-TV-DFP-0-edid.bin"
>
> I've rebooted computer 2 with this setup and all is ok.
>
> I then connected computer 1 to SR5002 HDMI3 and computer 2 to HDMI2 and
> booted computer 1, all works as before. On booting computer 2 and
> switching the SR5002 to HDMI2 the screen displays "No signal" after
> reelling through the stnd ubuntu boot log. If I vnc into computer 2
> from another machine the normal ubuntu window screen is displayed. I
> found that if I didn't include the xorg.conf line:
> Option "UseDisplayDevice" "DFP"
> then the X server didn't start.

Good. So, do that again, getting it to fail,
and then grap the /var/log/Xorg.0.log file
and post it here.

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icicimov at gmail

Jun 5, 2012, 6:51 PM

Post #24 of 24 (1243 views)
Permalink

Re: Weird HDMI problem [In reply to]

On Tue, Apr 10, 2012 at 10:31 AM, Igor Cicimov <icicimov [at] gmail> wrote:

> On Thu, Apr 5, 2012 at 8:13 PM, Mike Perkins <mikep [at] randomtraveller
> > wrote:
>
>> On 05/04/12 09:48, phipps-hutton [at] sky wrote:
>>
>>>
>>> Quoting Igor Cicimov <icicimov [at] gmail>:
>>>
>>>> The former LG TV must had been doing some HDMI wake up or something when
>>>> switching from TV to HDMI input. Or kept all outputs under power/active
>>>> in
>>>> all times where is with today's power saving TV's this is not the case.
>>>> I
>>>> guess it's just a bad combination of ATI driver and TV, the driver fails
>>>> waking up the HDMI and the TV not helping about this at all.
>>>>
>>>
>>> It's a defective TV and it's not power saving that is causing it. The
>>> EDID
>>> circuitry should be powered by the device connecting to the TV so that
>>> it works
>>> when the TV is off. There are power wires in VGA, DVI and HDMI
>>> specifically for
>>> this. The circuitry is very simple, basically just a tiny EPROM. I would
>>> guess
>>> that the TV manufacturer has decided to cut costs by only having one and
>>> connecting it up to the active input rather than have one per input or
>>> doing
>>> something smarter. FYI my Sony Bravia does the right thing on HDMI and
>>> VGA inputs.
>>>
>>> ...which might imply that one solution could be to try with your mythtv
>> connected to each HDMI input in turn. I have a Hitachi TV with two HDMI
>> inputs and they are definitely different in operation depending on what's
>> connected where. In my case, HDMI2 is the only one with an "exact-PC" scale
>> option.
>>
>> --
>>
>> Mike Perkins
>>
>>
>> ______________________________**_________________
>> mythtv-users mailing list
>> mythtv-users [at] mythtv
>> http://www.mythtv.org/mailman/**listinfo/mythtv-users<http://www.mythtv.org/mailman/listinfo/mythtv-users>
>>
>
> Thanks for the suggestion Mike, I tried it but didn't work for me. There
> also some lets call them advance settings for the HDMI in the TV (like
> power on/off the device connected etc) but, as usual for Sony, they are
> supported for Sony equipment only :-(
>
> I tried everything available in the driver and nothing worked so I guess
> I'll have to live with it for now (until my next TV upgrade)
>
>
Just a follow up on this. It is definitely fglrx issue and this is the
raised bug link:
https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/958279

Basically if the monitor/TV turns off there is no way to bring the desktop
back after switching it back on.

I't is against same Catalyst 12.2 I'm running on my system. If you follow
the link to ATI bug report site you will see the bug hasn't been even
assigned yet so we might be waiting for the fix for some time :P

Igor

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