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HDMI Audio out on MSI Meda Live

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gyrotech at freakinabox

Jun 13, 2008, 11:39 PM

Post #1 of 12 (3076 views)
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HDMI Audio out on MSI Meda Live

Hi all
I'm running Mythbuntu on an MSI Media Live PC and am trying to get audio
out working via the HDMI connector. I have been to the mythtv wiki and
followed instructions there
(http://www.mythtv.org/wiki/index.php/MSI_Media_Live) being install
version 1.61 of the BIOS and disable 8ch output there, as well as
setting mythtv to ALSA:spdif output.
When I connect a set of normal speakers up to the front panel output I
get sound just fine so I know that much is working. I don't have another
other HDMI devices to test with so I can't know if it's the cable but
I've been told that any HDMI cable will carry audio as long as the
source outputs the audio.

So if anyone has any pointers on where to start for me to diagnose and
solve this, let me know...

Thanks,

GT
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thecovert at gmail

Jun 13, 2008, 11:43 PM

Post #2 of 12 (2997 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

On Sat, Jun 14, 2008 at 4:39 PM, GyroTech <gyrotech [at] freakinabox> wrote:
> Hi all
> I'm running Mythbuntu on an MSI Media Live PC and am trying to get audio
> out working via the HDMI connector. I have been to the mythtv wiki and
> followed instructions there
> (http://www.mythtv.org/wiki/index.php/MSI_Media_Live) being install
> version 1.61 of the BIOS and disable 8ch output there, as well as
> setting mythtv to ALSA:spdif output.
> When I connect a set of normal speakers up to the front panel output I
> get sound just fine so I know that much is working. I don't have another
> other HDMI devices to test with so I can't know if it's the cable but
> I've been told that any HDMI cable will carry audio as long as the
> source outputs the audio.
>
> So if anyone has any pointers on where to start for me to diagnose and
> solve this, let me know...
>
> Thanks,
>
> GT
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>

Check if there are any messages in the Mythfrontend log file about
sound. When I tried to get Audio working over HDMI on my ATI based
motherboard I found the error messages in the log to be the most help.
Ended up having to change the sound device to alsa:digital (or
something like that)
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gyrotech at freakinabox

Jun 14, 2008, 12:04 AM

Post #3 of 12 (2979 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

covert covert wrote:
> Check if there are any messages in the Mythfrontend log file about
> sound. When I tried to get Audio working over HDMI on my ATI based
> motherboard I found the error messages in the log to be the most help.
> Ended up having to change the sound device to alsa:digital (or
> something like that)

OK, in the log I found one section that looked promising:

2008-06-13 23:54:19.208 AFD: codec AC3 has 0 channels
2008-06-13 23:54:19.237 AFD: Opened codec 0x5a6fe50, id(AC3) type(Audio)
2008-06-13 23:54:19.244 Opening audio device 'spdif'. ch 2(2) sr 48000
2008-06-13 23:54:19.244 Opening ALSA audio device 'spdif'.
ALSA lib control.c:909:(snd_ctl_open_noupdate) Invalid CTL /dev/mixer
2008-06-13 23:54:19.271 AudioOutput Warning: Mixer attach error -2: No
such file or directory
Check Mixer Name in Setup: '/dev/mixer'
2008-06-13 23:54:19.272 NVP: Enabling Audio
2008-06-13 23:54:19.274 AFD: Warning, audio codec 0x5a6fe50 id(AC3) type
(Audio) already open, leaving it alone.
2008-06-13 23:54:19.274 AFD: codec AC3 has 2 channels
2008-06-13 23:54:19.726 WriteAudio: buffer underrun

Obviously there is something wrong with spdif so I'm just going to try
each of the output settings in Utilities/Setup -> General until I hear
something...

Thanks, I'll let you know how it went...

GT
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thecovert at gmail

Jun 14, 2008, 12:12 AM

Post #4 of 12 (2990 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

On Sat, Jun 14, 2008 at 5:04 PM, GyroTech <gyrotech [at] freakinabox> wrote:
> covert covert wrote:
>> Check if there are any messages in the Mythfrontend log file about
>> sound. When I tried to get Audio working over HDMI on my ATI based
>> motherboard I found the error messages in the log to be the most help.
>> Ended up having to change the sound device to alsa:digital (or
>> something like that)
>
> OK, in the log I found one section that looked promising:
>
> 2008-06-13 23:54:19.208 AFD: codec AC3 has 0 channels
> 2008-06-13 23:54:19.237 AFD: Opened codec 0x5a6fe50, id(AC3) type(Audio)
> 2008-06-13 23:54:19.244 Opening audio device 'spdif'. ch 2(2) sr 48000
> 2008-06-13 23:54:19.244 Opening ALSA audio device 'spdif'.
> ALSA lib control.c:909:(snd_ctl_open_noupdate) Invalid CTL /dev/mixer
> 2008-06-13 23:54:19.271 AudioOutput Warning: Mixer attach error -2: No
> such file or directory
> Check Mixer Name in Setup: '/dev/mixer'
> 2008-06-13 23:54:19.272 NVP: Enabling Audio
> 2008-06-13 23:54:19.274 AFD: Warning, audio codec 0x5a6fe50 id(AC3) type
> (Audio) already open, leaving it alone.
> 2008-06-13 23:54:19.274 AFD: codec AC3 has 2 channels
> 2008-06-13 23:54:19.726 WriteAudio: buffer underrun
>
> Obviously there is something wrong with spdif so I'm just going to try
> each of the output settings in Utilities/Setup -> General until I hear
> something...
>
> Thanks, I'll let you know how it went...
>
> GT
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>

My audio device is ALSA:mixed-digital. Unticked "Use internal volume
control" removes my mixed error messages (and the options for mixer).
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gyrotech at freakinabox

Jun 14, 2008, 12:29 AM

Post #5 of 12 (2976 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

covert covert wrote:
> My audio device is ALSA:mixed-digital. Unticked "Use internal volume
> control" removes my mixed error messages (and the options for mixer).
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

Setting the device to ALSA:mixed-digital or ALSA:digital seem to no
longer produce errors, but also no audio itself.

Could it be confirmed that I couldn't have picked up a video-only HDMI
cable :-)

GT
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gyrotech at freakinabox

Jun 14, 2008, 11:13 AM

Post #6 of 12 (2948 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

covert covert wrote:
>
> My audio device is ALSA:mixed-digital. Unticked "Use internal volume
> control" removes my mixed error messages (and the options for mixer).

Well, I've been fiddling with all the settings I can see and nothing
seems to work. Could it be something with the underlying Unbuntu system,
rather than mythtv itself?? Does anyone know where I could look for any
more clues??

TIA

GT
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bill at bbqninja

Jun 14, 2008, 7:11 PM

Post #7 of 12 (2917 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

On Sun, Jun 15, 2008 at 4:13 AM, GyroTech <gyrotech [at] freakinabox> wrote:
> covert covert wrote:
>>
>> My audio device is ALSA:mixed-digital. Unticked "Use internal volume
>> control" removes my mixed error messages (and the options for mixer).
>
> Well, I've been fiddling with all the settings I can see and nothing
> seems to work. Could it be something with the underlying Unbuntu system,
> rather than mythtv itself?? Does anyone know where I could look for any
> more clues??

An easy one is "do you get sound when you log in." If not, it's an
underlying ubuntu problem. The most common digital output problem is
that the digital-output mixer is (sometimes, I can't figure out when
or when not) muted by default. Go into alsa-mixer (or the volume
control in ubunt, you'll need to go into advanced options and enable
EVERYTHING to get the checkbox) and make sure digital out is not
muted.
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gyrotech at freakinabox

Jun 15, 2008, 2:26 AM

Post #8 of 12 (2917 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

Bill Williamson wrote:
> An easy one is "do you get sound when you log in." If not, it's an
> underlying ubuntu problem. The most common digital output problem is
> that the digital-output mixer is (sometimes, I can't figure out when
> or when not) muted by default. Go into alsa-mixer (or the volume
> control in ubunt, you'll need to go into advanced options and enable
> EVERYTHING to get the checkbox) and make sure digital out is not
> muted.

Been playing around a bit more this weekend (aren't weekends great :-) )
and it seems that audio out works fine on all of the analog outputs but
none of the digital. This is true when just playing a file with Mplayer
on the Mythbuntu desktop. The coaxial output gives me nothing when
connected to my digital amp, and the optical output isn't even lit.

Interestingly enough though, when running ALSAmixer, I don't get any
control over the volume bar for IEC958, if that is the digital out then
maybe it is still disabled somewhere...
So I run aplay -L and interestingly enough,

iec958:CARD=NVidia,DEV=0
HDA NVidia, ALC883 Digital
IEC958 (S/PDIF) Digital Audio Output
null
Discard all samples (playback) or generate zero samples (capture)

So how the heck is that happening and, more importantly, how do I make
it stop?? Or start as the case may be :-D

GT
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thecovert at gmail

Jun 15, 2008, 2:31 AM

Post #9 of 12 (2913 views)
Permalink

Re: HDMI Audio out on MSI Meda Live [In reply to]

On Sun, Jun 15, 2008 at 7:26 PM, GyroTech <gyrotech [at] freakinabox> wrote:
> Bill Williamson wrote:
>> An easy one is "do you get sound when you log in." If not, it's an
>> underlying ubuntu problem. The most common digital output problem is
>> that the digital-output mixer is (sometimes, I can't figure out when
>> or when not) muted by default. Go into alsa-mixer (or the volume
>> control in ubunt, you'll need to go into advanced options and enable
>> EVERYTHING to get the checkbox) and make sure digital out is not
>> muted.
>
> Been playing around a bit more this weekend (aren't weekends great :-) )
> and it seems that audio out works fine on all of the analog outputs but
> none of the digital. This is true when just playing a file with Mplayer
> on the Mythbuntu desktop. The coaxial output gives me nothing when
> connected to my digital amp, and the optical output isn't even lit.
>
> Interestingly enough though, when running ALSAmixer, I don't get any
> control over the volume bar for IEC958, if that is the digital out then
> maybe it is still disabled somewhere...
> So I run aplay -L and interestingly enough,
>
> iec958:CARD=NVidia,DEV=0
> HDA NVidia, ALC883 Digital
> IEC958 (S/PDIF) Digital Audio Output
> null
> Discard all samples (playback) or generate zero samples (capture)
>
> So how the heck is that happening and, more importantly, how do I make
> it stop?? Or start as the case may be :-D
>
> GT
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>

Disable onboard sound in the bios. This should leave you only one item
in alsa mixer. Make sure it is un-muted.
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bert at bertenselena

Jun 15, 2008, 3:04 AM

Post #10 of 12 (2918 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

Hi,

A bit off-topic (or entirely off-topic actually;-) I've been looking
at the MSI media live for a full HD media centre. But I see
contradictory reports in various forums if this box is capable to do
full HD (1080p, 40Mb/s streams) Since you are working with this box
I'm hoping you can shed some light on this. What is your experience so
far: Can I expect a blue-ray movie to play smoothly in HD on this box?

Regards,

Bert Haverkamp

2008/6/15 covert covert <thecovert [at] gmail>:
> On Sun, Jun 15, 2008 at 7:26 PM, GyroTech <gyrotech [at] freakinabox> wrote:
>> Bill Williamson wrote:
>>> An easy one is "do you get sound when you log in." If not, it's an
>>> underlying ubuntu problem. The most common digital output problem is
>>> that the digital-output mixer is (sometimes, I can't figure out when
>>> or when not) muted by default. Go into alsa-mixer (or the volume
>>> control in ubunt, you'll need to go into advanced options and enable
>>> EVERYTHING to get the checkbox) and make sure digital out is not
>>> muted.
>>
>> Been playing around a bit more this weekend (aren't weekends great :-) )
>> and it seems that audio out works fine on all of the analog outputs but
>> none of the digital. This is true when just playing a file with Mplayer
>> on the Mythbuntu desktop. The coaxial output gives me nothing when
>> connected to my digital amp, and the optical output isn't even lit.
>>
>> Interestingly enough though, when running ALSAmixer, I don't get any
>> control over the volume bar for IEC958, if that is the digital out then
>> maybe it is still disabled somewhere...
>> So I run aplay -L and interestingly enough,
>>
>> iec958:CARD=NVidia,DEV=0
>> HDA NVidia, ALC883 Digital
>> IEC958 (S/PDIF) Digital Audio Output
>> null
>> Discard all samples (playback) or generate zero samples (capture)
>>
>> So how the heck is that happening and, more importantly, how do I make
>> it stop?? Or start as the case may be :-D
>>
>> GT
>> _______________________________________________
>> mythtv-users mailing list
>> mythtv-users [at] mythtv
>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>
>
> Disable onboard sound in the bios. This should leave you only one item
> in alsa mixer. Make sure it is un-muted.
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>

--
-----------------------------------------------------
There are 10 kind of people in the world:
those who understand binary and those who don't.
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richardwoelk at yahoo

Jun 15, 2008, 4:11 PM

Post #11 of 12 (2894 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

GyroTech wrote:
>
> Could it be confirmed that I couldn't have picked up a video-only HDMI
> cable :-)
>
> GT
>

There is no such thing as a video only hdmi cable. Think of an HDMI
cable as a USB cable. It is just a data connection
an HDMI signal is basically serial data. Audio is interleaved
sequentially with the video into the signal.

- Richard

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gyrotech at freakinabox

Jun 20, 2008, 10:13 AM

Post #12 of 12 (2700 views)
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Re: HDMI Audio out on MSI Meda Live [In reply to]

covert covert wrote:
> Disable onboard sound in the bios. This should leave you only one item
> in alsa mixer. Make sure it is un-muted.

Once sound is disabled in BIOS, there are no devices at all listed in
alsa mixer or aplay -L ...
I'm guessing that's not what you were expecting...

Any ideas??

GT

P.S. Sorry it took me so long to reply, got sent off on site for a week
for work :-S
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