Mailing List Archive: MythTV: Users

nVidia Interlaced output

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steve at nexusuk

Feb 14, 2004, 10:25 AM

Post #1 of 15 (3344 views)
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nVidia Interlaced output

I mailed nVidia asking if there were actually any plans to introduced
interlacing support on the linux drivers (since they don't seem to have
made any comment on the nvidia forum). I got back quite a promising
reply (attached).

--

- Steve http://www.nexusuk.org/

Servatis a periculum, servatis a maleficum - Whisper, Evanescence

---------- Forwarded message ----------
Date: Sat, 14 Feb 2004 12:16:19 -0500 (EST)
From: Andy Ritger <ARitger[at]nvidia.com>
To: steve[at]nexusuk.org
Cc: linux-bugs <linux-bugs[at]nvidia.com>
Subject: Re: Interlaced output

Greetings, Steve. The next release of our drivers should include
support for interlaced modes on GPUs that support them (some of
GPUs didn't have hw support for interlaced modes).

What graphics card do you have?

Thanks,
- Andy Ritger

wd at pobox

Feb 14, 2004, 11:05 AM

Post #2 of 15 (3314 views)
Permalink

Re: nVidia Interlaced output [In reply to]

At 05:25 PM 2/14/2004 +0000, you wrote:
>---------- Forwarded message ----------
>Date: Sat, 14 Feb 2004 12:16:19 -0500 (EST)
>From: Andy Ritger <ARitger[at]nvidia.com>
>To: steve[at]nexusuk.org
>Cc: linux-bugs <linux-bugs[at]nvidia.com>
>Subject: Re: Interlaced output
>
>
>Greetings, Steve. The next release of our drivers should include
>support for interlaced modes on GPUs that support them (some of
>GPUs didn't have hw support for interlaced modes).

Now the important question is.....
What GPUs *do* support interlaced modes in HW?

-WD

steve at nexusuk

Feb 14, 2004, 11:36 AM

Post #3 of 15 (3316 views)
Permalink

Re: nVidia Interlaced output [In reply to]

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On Sat, 14 Feb 2004, Will Dormann wrote:

> Now the important question is.....
> What GPUs *do* support interlaced modes in HW?

Well I mailed him back and told him I had an MX-440 (which I believe does
interlacing under windows) and he said he thought that'd work ok. Since
most of the el cheapo cards are 440's this is good news.

I'm actually really impressed - I got an answer very quickly, and on a
Saturday no less!

- --

- Steve http://www.nexusuk.org/
(Public key available on my website)

Servatis a periculum, servatis a maleficum - Whisper, Evanescence

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papenfuss at juneau

Feb 14, 2004, 11:53 AM

Post #4 of 15 (3308 views)
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Re: nVidia Interlaced output [In reply to]

Hrm.... I send an email over a week ago and didn't receive a response.
I wouldn't want to inundate him with email, but perhaps you could ask him which
cards do and don't support interlacing. If he could get a list and either send
it to you or have the engineers doing the official release put it in the
documentation, that'd be great. I've found it a real bitch to really determing
which cards (nvidia or not) support interlaced modes without having one
physically in my machine and try it out. Even then, the XFree86.log gives the
non-descript "bad mode clock/interlace/doublescan" which doesn't really say.

-Cory

On Sat, 14 Feb 2004 steve[at]nexusuk.org wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On Sat, 14 Feb 2004, Will Dormann wrote:
>
> > Now the important question is.....
> > What GPUs *do* support interlaced modes in HW?
>
> Well I mailed him back and told him I had an MX-440 (which I believe does
> interlacing under windows) and he said he thought that'd work ok. Since
> most of the el cheapo cards are 440's this is good news.
>
> I'm actually really impressed - I got an answer very quickly, and on a
> Saturday no less!
>
> - --
>
> - Steve http://www.nexusuk.org/
> (Public key available on my website)
>
> Servatis a periculum, servatis a maleficum - Whisper, Evanescence
>
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>

--
*************************************************************************
* The prime directive of Linux: *
* - learn what you don't know, *
* - teach what you do. *
* (Just my 20 USm$) *
*************************************************************************

wd at pobox

Feb 14, 2004, 3:19 PM

Post #5 of 15 (3301 views)
Permalink

Re: nVidia Interlaced output [In reply to]

At 06:36 PM 2/14/2004 +0000, you wrote:
>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1
>
>On Sat, 14 Feb 2004, Will Dormann wrote:
>
>> Now the important question is.....
>> What GPUs *do* support interlaced modes in HW?
>
>Well I mailed him back and told him I had an MX-440 (which I believe does
>interlacing under windows) and he said he thought that'd work ok. Since
>most of the el cheapo cards are 440's this is good news.

I'm assuming you mean a Geforce4 MX-440? (Since there are Geforce2
MX-440 cards)

-WD

steve at nexusuk

Feb 14, 2004, 3:30 PM

Post #6 of 15 (3291 views)
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Re: nVidia Interlaced output [In reply to]

-----BEGIN PGP SIGNED MESSAGE-----
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On Sat, 14 Feb 2004, Will Dormann wrote:

> I'm assuming you mean a Geforce4 MX-440? (Since there are Geforce2
> MX-440 cards)

Yes - Geforce 4 MX-440.

- --

- Steve http://www.nexusuk.org/

Servatis a periculum, servatis a maleficum - Whisper, Evanescence

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christianh at edmi

Feb 14, 2004, 4:12 PM

Post #7 of 15 (3297 views)
Permalink

Re: nVidia Interlaced output [In reply to]

----- Original Message -----
From: "Will Dormann" <wd[at]pobox.com>
To: "Discussion about mythtv" <mythtv-users[at]mythtv.org>
Sent: Sunday, February 15, 2004 8:19 AM
Subject: Re: [mythtv-users] nVidia Interlaced output

> At 06:36 PM 2/14/2004 +0000, you wrote:
> >-----BEGIN PGP SIGNED MESSAGE-----
> >Hash: SHA1
> >
> >On Sat, 14 Feb 2004, Will Dormann wrote:
> >
> >> Now the important question is.....
> >> What GPUs *do* support interlaced modes in HW?
> >
> >Well I mailed him back and told him I had an MX-440 (which I believe does
> >interlacing under windows) and he said he thought that'd work ok. Since
> >most of the el cheapo cards are 440's this is good news.
>
>
> I'm assuming you mean a Geforce4 MX-440? (Since there are Geforce2
> MX-440 cards)
>

Don't think so. The Geforce2s are MX400s not MX440s.

CH

_______________________________________________
mythtv-users mailing list
mythtv-users[at]mythtv.org
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

wd at pobox

Feb 14, 2004, 4:36 PM

Post #8 of 15 (3301 views)
Permalink

Re: nVidia Interlaced output [In reply to]

At 09:12 AM 2/15/2004 +1000, you wrote:
>
>----- Original Message -----
>From: "Will Dormann" <wd[at]pobox.com>
>> I'm assuming you mean a Geforce4 MX-440? (Since there are Geforce2
>> MX-440 cards)
>>
>
>Don't think so. The Geforce2s are MX400s not MX440s.

Now that you mention it, it seems that I was mistaken. I guess I've seen
them mislabeled enough to think that they exist.
http://www.google.com/search?btnG=Google+Search&q=geforce2%20mx440

-WD

jcw at wilsonet

Feb 15, 2004, 1:25 AM

Post #9 of 15 (3318 views)
Permalink

Re: nVidia Interlaced output [In reply to]

On Feb 14, 2004, at 09:25, steve[at]nexusuk.org wrote:

> I mailed nVidia asking if there were actually any plans to introduced
> interlacing support on the linux drivers (since they don't seem to have
> made any comment on the nvidia forum). I got back quite a promising
> reply (attached).

Sweet! 1920x1080i, here I come... Figures, just after I bought that SiS
card (still in transit from newegg). Oh well. I'll be all over that new
nvidia driver if/when it sees the light of day.

--
Jarod C. Wilson, RHCE

Got a question? Read this first...
http://catb.org/~esr/faqs/smart-questions.html
MythTV, Fedora Core & ATrpms documentation:
http://wilsonet.com/mythtv/
MythTV Searchable Mailing List Archive
http://www.gossamer-threads.com/archive/MythTV_C2/

Attachments:

PGP.sig (0.18 KB)

steve at nexusuk

Feb 15, 2004, 2:36 AM

Post #10 of 15 (3293 views)
Permalink

Re: nVidia Interlaced output [In reply to]

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On Sun, 15 Feb 2004, Jarod C. Wilson wrote:

> Sweet! 1920x1080i, here I come... Figures, just after I bought that SiS
> card (still in transit from newegg). Oh well. I'll be all over that new
> nvidia driver if/when it sees the light of day.

Oh, he said release date would be late March... here's hoping that some
other bug isn't introduced to make the drivers unusable :)

(I can't remember why we recommend sticking with the 4363 build?)

- --

- Steve http://www.nexusuk.org/

Servatis a periculum, servatis a maleficum - Whisper, Evanescence

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christianh at edmi

Feb 15, 2004, 2:58 AM

Post #11 of 15 (3319 views)
Permalink

Re: nVidia Interlaced output [In reply to]

----- Original Message -----
From: <steve[at]nexusuk.org>
To: "Discussion about mythtv" <mythtv-users[at]mythtv.org>
Sent: Sunday, February 15, 2004 7:36 PM
Subject: Re: [mythtv-users] nVidia Interlaced output

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On Sun, 15 Feb 2004, Jarod C. Wilson wrote:
>
> > Sweet! 1920x1080i, here I come... Figures, just after I bought that SiS
> > card (still in transit from newegg). Oh well. I'll be all over that new
> > nvidia driver if/when it sees the light of day.
>
> Oh, he said release date would be late March... here's hoping that some
> other bug isn't introduced to make the drivers unusable :)
>
> (I can't remember why we recommend sticking with the 4363 build?)
>

Because it supports both the AV sync feature and Overscan. These disappeared
in 4496 (I think that was the next one).

I believe the most recent brought one but not both features back.

CH

_______________________________________________
mythtv-users mailing list
mythtv-users[at]mythtv.org
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

steve at nexusuk

Feb 15, 2004, 4:17 AM

Post #12 of 15 (3314 views)
Permalink

Re: nVidia Interlaced output [In reply to]

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On Sun, 15 Feb 2004, Christian Hack wrote:

> > (I can't remember why we recommend sticking with the 4363 build?)
>
> Because it supports both the AV sync feature and Overscan. These disappeared
> in 4496 (I think that was the next one).
>
> I believe the most recent brought one but not both features back.

Oh, that's a pain... I really hope they both reappear in the next
release.

- --

- Steve http://www.nexusuk.org/

Servatis a periculum, servatis a maleficum - Whisper, Evanescence

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steven.cruysberghs at pi

Feb 15, 2004, 6:34 AM

Post #13 of 15 (3306 views)
Permalink

Re: nVidia Interlaced output [In reply to]

what does the AV Sync feature do? Should i read this as Audio-Video or
is it something that has to do with vertical sync.
The problem I'm always noticed when I used nvidia cards for tvout is a
"tearing" effect. Top and bottom half of screen don't match when there
is horizontal panning in the video. But I was using the newest driver
when I saw this. Could switching back to 4363 solve this?

Op zo 15-02-2004, om 12:17 schreef steve[at]nexusuk.org:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On Sun, 15 Feb 2004, Christian Hack wrote:
>
> > > (I can't remember why we recommend sticking with the 4363 build?)
> >
> > Because it supports both the AV sync feature and Overscan. These disappeared
> > in 4496 (I think that was the next one).
> >
> > I believe the most recent brought one but not both features back.
>
> Oh, that's a pain... I really hope they both reappear in the next
> release.
>
> - --
>
> - Steve http://www.nexusuk.org/
>
> Servatis a periculum, servatis a maleficum - Whisper, Evanescence
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.2.3 (GNU/Linux)
> Comment: Public key available at http://www.nexusuk.org/pubkey.txt
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>
> ______________________________________________________________________
> _______________________________________________
> mythtv-users mailing list
> mythtv-users[at]mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

steve at nexusuk

Feb 15, 2004, 8:12 AM

Post #14 of 15 (3319 views)
Permalink

Re: nVidia Interlaced output [In reply to]

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On Sun, 15 Feb 2004, Steven Cruysberghs wrote:

> what does the AV Sync feature do? Should i read this as Audio-Video or
> is it something that has to do with vertical sync.

It allows Myth to sync with the vertical retrace.

> The problem I'm always noticed when I used nvidia cards for tvout is a
> "tearing" effect. Top and bottom half of screen don't match when there
> is horizontal panning in the video. But I was using the newest driver
> when I saw this. Could switching back to 4363 solve this?

Yes, switching to 4363 will likely fix the problem. (I'm assuming you
have the VGA output turned off in your X config and are only using the TV
output? I think if you have them both turned on then Myth will sync with
the monitor's refresh instead of the TV, which will cause tearing on the
tv).

- --

- Steve http://www.nexusuk.org/

Servatis a periculum, servatis a maleficum - Whisper, Evanescence

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peloy at chapus

Feb 16, 2004, 7:03 PM

Post #15 of 15 (3326 views)
Permalink

Re: nVidia Interlaced output [In reply to]

steve[at]nexusuk.org writes:

> I'm actually really impressed - I got an answer very quickly, and on a
> Saturday no less!

I believe the person you have been in contact with at nVidia is *the*
Linux guy at nVidia. I've seen his posts in the nVidia forums. He must
be a Linux user himself. Somebody ought to donate a Myth box to him so
we all can enjoy much better drivers in the future (nope, I am not
volunteering :-)

Eloy.-

P.S. I am very happy with my GeForce 4 card with TV out and the nVidia
drivers. I am running an old version of the driver since they produce
better quality than newer versions, but still, good job on nVidia's part.

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