[alsa-devel] via82xx: unreliable audio, strange mixer behavior
Hi,
I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here:
http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78
Here are the symptoms:
Audio goes away after a semi-random interval. Sometimes it returns after `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it seems to take a full reboot.
This looks similar to:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194
Some folks think that this kind of issue is triggered by audio volume being above a certain level. I'm not entirely sure if this is true, but I think it is. One time, I apparently triggered the issue by unplugging and replugging the audio cable from the mainboard during playback.
Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). The volume does get louder when I turn up that mixer control, but it never goes away entirely when I turn the volume to zero. Mute works as expected.
This issue is impacting a significant project for me and my company. I'm willing to spend as much time as it takes to debug, and I'm fairly technical. I can also offer a bounty of some sort, if that interests anyone.
Can anyone offer any input?
Thanks, Forest -- Forest Bond http://www.alittletooquiet.net http://www.pytagsfs.org
At Thu, 20 Nov 2008 12:04:09 -0500, Forest Bond wrote:
Hi,
I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here:
http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78
Here are the symptoms:
Audio goes away after a semi-random interval. Sometimes it returns after `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it seems to take a full reboot.
This looks similar to:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194
Some folks think that this kind of issue is triggered by audio volume being above a certain level. I'm not entirely sure if this is true, but I think it is. One time, I apparently triggered the issue by unplugging and replugging the audio cable from the mainboard during playback.
Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). The volume does get louder when I turn up that mixer control, but it never goes away entirely when I turn the volume to zero. Mute works as expected.
The volume 0 doesn't always mean the mute on several hardwares. So this can be irrelevant if it happens always.
I vaguely remember about the low-power mode of some codec chips. Which codec chip does your system have? Please run alsa-info.sh with --no-upload option, and attach the output file.
Takashi
Hi,
On Fri, Nov 21, 2008 at 12:59:10PM +0100, Takashi Iwai wrote:
At Thu, 20 Nov 2008 12:04:09 -0500, Forest Bond wrote:
Hi,
I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here:
http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78
Here are the symptoms:
Audio goes away after a semi-random interval. Sometimes it returns after `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it seems to take a full reboot.
This looks similar to:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194
Some folks think that this kind of issue is triggered by audio volume being above a certain level. I'm not entirely sure if this is true, but I think it is. One time, I apparently triggered the issue by unplugging and replugging the audio cable from the mainboard during playback.
Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). The volume does get louder when I turn up that mixer control, but it never goes away entirely when I turn the volume to zero. Mute works as expected.
The volume 0 doesn't always mean the mute on several hardwares. So this can be irrelevant if it happens always.
I vaguely remember about the low-power mode of some codec chips. Which codec chip does your system have? Please run alsa-info.sh with --no-upload option, and attach the output file.
The output would be the same as what was already uploaded, right? I've attached that output here for your convenience.
Thanks, Forest
At Fri, 21 Nov 2008 07:08:23 -0500, Forest Bond wrote:
Hi,
On Fri, Nov 21, 2008 at 12:59:10PM +0100, Takashi Iwai wrote:
At Thu, 20 Nov 2008 12:04:09 -0500, Forest Bond wrote:
Hi,
I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here:
http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78
Here are the symptoms:
Audio goes away after a semi-random interval. Sometimes it returns after `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it seems to take a full reboot.
This looks similar to:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194
Some folks think that this kind of issue is triggered by audio volume being above a certain level. I'm not entirely sure if this is true, but I think it is. One time, I apparently triggered the issue by unplugging and replugging the audio cable from the mainboard during playback.
Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). The volume does get louder when I turn up that mixer control, but it never goes away entirely when I turn the volume to zero. Mute works as expected.
The volume 0 doesn't always mean the mute on several hardwares. So this can be irrelevant if it happens always.
I vaguely remember about the low-power mode of some codec chips. Which codec chip does your system have? Please run alsa-info.sh with --no-upload option, and attach the output file.
The output would be the same as what was already uploaded, right? I've attached that output here for your convenience.
Thanks, it's always better to post the content than a URL.
Any chance to try the later version of alsa-driver? Yours looks pretty old.
Takashi
Hi Takashi,
On Fri, Nov 21, 2008 at 01:54:43PM +0100, Takashi Iwai wrote:
At Fri, 21 Nov 2008 07:08:23 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 12:59:10PM +0100, Takashi Iwai wrote:
At Thu, 20 Nov 2008 12:04:09 -0500, Forest Bond wrote:
Hi,
I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here:
http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78
Here are the symptoms:
Audio goes away after a semi-random interval. Sometimes it returns after `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it seems to take a full reboot.
This looks similar to:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194
Some folks think that this kind of issue is triggered by audio volume being above a certain level. I'm not entirely sure if this is true, but I think it is. One time, I apparently triggered the issue by unplugging and replugging the audio cable from the mainboard during playback.
Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). The volume does get louder when I turn up that mixer control, but it never goes away entirely when I turn the volume to zero. Mute works as expected.
The volume 0 doesn't always mean the mute on several hardwares. So this can be irrelevant if it happens always.
I vaguely remember about the low-power mode of some codec chips. Which codec chip does your system have? Please run alsa-info.sh with --no-upload option, and attach the output file.
The output would be the same as what was already uploaded, right? I've attached that output here for your convenience.
Thanks, it's always better to post the content than a URL.
Any chance to try the later version of alsa-driver? Yours looks pretty old.
I can try this a bit later today. I'll report the results ASAP.
Thanks, Forest
At Fri, 21 Nov 2008 11:32:56 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 01:54:43PM +0100, Takashi Iwai wrote:
At Fri, 21 Nov 2008 07:08:23 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 12:59:10PM +0100, Takashi Iwai wrote:
At Thu, 20 Nov 2008 12:04:09 -0500, Forest Bond wrote:
Hi,
I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here:
http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78
Here are the symptoms:
Audio goes away after a semi-random interval. Sometimes it returns after `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it seems to take a full reboot.
This looks similar to:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194
Some folks think that this kind of issue is triggered by audio volume being above a certain level. I'm not entirely sure if this is true, but I think it is. One time, I apparently triggered the issue by unplugging and replugging the audio cable from the mainboard during playback.
Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). The volume does get louder when I turn up that mixer control, but it never goes away entirely when I turn the volume to zero. Mute works as expected.
The volume 0 doesn't always mean the mute on several hardwares. So this can be irrelevant if it happens always.
I vaguely remember about the low-power mode of some codec chips. Which codec chip does your system have? Please run alsa-info.sh with --no-upload option, and attach the output file.
The output would be the same as what was already uploaded, right? I've attached that output here for your convenience.
Thanks, it's always better to post the content than a URL.
Any chance to try the later version of alsa-driver? Yours looks pretty old.
I can try this a bit later today. I'll report the results ASAP.
BTW, try the one from the URL below instead of 1.0.18a. This contains the newest alsa-driver snapshot: ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/snapshot/alsa-driver-snapshot.tar.gz
Takashi
Hi,
On Fri, Nov 21, 2008 at 05:36:49PM +0100, Takashi Iwai wrote:
At Fri, 21 Nov 2008 11:32:56 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 01:54:43PM +0100, Takashi Iwai wrote:
At Fri, 21 Nov 2008 07:08:23 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 12:59:10PM +0100, Takashi Iwai wrote:
At Thu, 20 Nov 2008 12:04:09 -0500, Forest Bond wrote:
Hi,
I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here:
http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78
Here are the symptoms:
Audio goes away after a semi-random interval. Sometimes it returns after `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it seems to take a full reboot.
This looks similar to:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194
Some folks think that this kind of issue is triggered by audio volume being above a certain level. I'm not entirely sure if this is true, but I think it is. One time, I apparently triggered the issue by unplugging and replugging the audio cable from the mainboard during playback.
Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). The volume does get louder when I turn up that mixer control, but it never goes away entirely when I turn the volume to zero. Mute works as expected.
The volume 0 doesn't always mean the mute on several hardwares. So this can be irrelevant if it happens always.
I vaguely remember about the low-power mode of some codec chips. Which codec chip does your system have? Please run alsa-info.sh with --no-upload option, and attach the output file.
The output would be the same as what was already uploaded, right? I've attached that output here for your convenience.
Thanks, it's always better to post the content than a URL.
Any chance to try the later version of alsa-driver? Yours looks pretty old.
I can try this a bit later today. I'll report the results ASAP.
BTW, try the one from the URL below instead of 1.0.18a. This contains the newest alsa-driver snapshot: ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/snapshot/alsa-driver-snapshot.tar.gz
Brief testing indicates that 1.0.18a seems to fix the issue, actually. Sorry, I forgot that you had asked me to test the snapshot.
Would it be helpful for you for me to try the snapshot as well (maybe to check for a regression)? Any idea as to what change may have fixed this?
Thanks, Forest
At Mon, 24 Nov 2008 15:03:06 -0500, Forest Bond wrote:
Hi,
On Fri, Nov 21, 2008 at 05:36:49PM +0100, Takashi Iwai wrote:
At Fri, 21 Nov 2008 11:32:56 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 01:54:43PM +0100, Takashi Iwai wrote:
At Fri, 21 Nov 2008 07:08:23 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 12:59:10PM +0100, Takashi Iwai wrote:
At Thu, 20 Nov 2008 12:04:09 -0500, Forest Bond wrote: > > Hi, > > I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here: > > http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78 > > Here are the symptoms: > > Audio goes away after a semi-random interval. Sometimes it returns after > `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it > seems to take a full reboot. > > This looks similar to: > > https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194 > > Some folks think that this kind of issue is triggered by audio volume being > above a certain level. I'm not entirely sure if this is true, but I think it > is. One time, I apparently triggered the issue by unplugging and replugging the > audio cable from the mainboard during playback. > > Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). > The volume does get louder when I turn up that mixer control, but it never goes > away entirely when I turn the volume to zero. Mute works as expected.
The volume 0 doesn't always mean the mute on several hardwares. So this can be irrelevant if it happens always.
I vaguely remember about the low-power mode of some codec chips. Which codec chip does your system have? Please run alsa-info.sh with --no-upload option, and attach the output file.
The output would be the same as what was already uploaded, right? I've attached that output here for your convenience.
Thanks, it's always better to post the content than a URL.
Any chance to try the later version of alsa-driver? Yours looks pretty old.
I can try this a bit later today. I'll report the results ASAP.
BTW, try the one from the URL below instead of 1.0.18a. This contains the newest alsa-driver snapshot: ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/snapshot/alsa-driver-snapshot.tar.gz
Brief testing indicates that 1.0.18a seems to fix the issue, actually. Sorry, I forgot that you had asked me to test the snapshot.
Would it be helpful for you for me to try the snapshot as well (maybe to check for a regression)?
Yes, it'd be helpful.
Any idea as to what change may have fixed this?
It's about the low-power mode of VIA ac97 codec chip.
Takashi
Hi,
On Tue, Nov 25, 2008 at 12:09:22AM +0100, Takashi Iwai wrote:
At Mon, 24 Nov 2008 15:03:06 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 05:36:49PM +0100, Takashi Iwai wrote:
At Fri, 21 Nov 2008 11:32:56 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 01:54:43PM +0100, Takashi Iwai wrote:
At Fri, 21 Nov 2008 07:08:23 -0500, Forest Bond wrote:
On Fri, Nov 21, 2008 at 12:59:10PM +0100, Takashi Iwai wrote: > At Thu, 20 Nov 2008 12:04:09 -0500, > Forest Bond wrote: >> >> Hi, >> >> I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here: >> >> http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78 >> >> Here are the symptoms: >> >> Audio goes away after a semi-random interval. Sometimes it returns after >> `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it >> seems to take a full reboot. >> >> This looks similar to: >> >> https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194 >> >> Some folks think that this kind of issue is triggered by audio volume being >> above a certain level. I'm not entirely sure if this is true, but I think it >> is. One time, I apparently triggered the issue by unplugging and replugging the >> audio cable from the mainboard during playback. >> >> Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). >> The volume does get louder when I turn up that mixer control, but it never goes >> away entirely when I turn the volume to zero. Mute works as expected. > > The volume 0 doesn't always mean the mute on several hardwares. > So this can be irrelevant if it happens always. > > I vaguely remember about the low-power mode of some codec chips. > Which codec chip does your system have? Please run alsa-info.sh with > --no-upload option, and attach the output file.
The output would be the same as what was already uploaded, right? I've attached that output here for your convenience.
Thanks, it's always better to post the content than a URL.
Any chance to try the later version of alsa-driver? Yours looks pretty old.
I can try this a bit later today. I'll report the results ASAP.
BTW, try the one from the URL below instead of 1.0.18a. This contains the newest alsa-driver snapshot: ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/snapshot/alsa-driver-snapshot.tar.gz
Brief testing indicates that 1.0.18a seems to fix the issue, actually. Sorry, I forgot that you had asked me to test the snapshot.
Would it be helpful for you for me to try the snapshot as well (maybe to check for a regression)?
Yes, it'd be helpful.
The snapshot seems to work well, also.
Thanks for your help!
-Forest
participants (2)
-
Forest Bond -
Takashi Iwai