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Old 03-01-2010, 12:05 PM
Alexander van Loon
 
Default PowerTOP: audio device active 100% of the time, how to file bug?

Please see this – https://bugs.launchpad.net/ubuntu/+bug/521424 – bug
report. To make a long story short: PowerTOP notices that one or two
audio devices are active 100% of the time, thus causing unnecessary
power consumption. However, this only occurred on Kubuntu 9.10, Ubuntu
9.10 wasn’t affected and had a significantly lower power consumption.
The problem is still present on Kubuntu Lucid, both with the standard
kernel and the 2.6.33 kernel. This was all tested with fresh
installations.

As you can read in my bug report, I spent quite some time researching
this and figuring out what was going on, but I still wasn’t sure for
which package I should file a bug report, and to whom it should be
assigned, exactly because only Kubuntu seems to be affected. The bug
report is a few weeks old now, without any response.

My question is, can anyone tell me to which person(s) I should bring
this bug to attention, and what information I should provide in my bug
report to help getting it fixed?


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Old 03-01-2010, 02:08 PM
Daniel Chen
 
Default PowerTOP: audio device active 100% of the time, how to file bug?

On Mon, Mar 1, 2010 at 9:49 AM, Mackenzie Morgan <macoafi@gmail.com> wrote:
> interesting bug you might want to take a look at...
> different levels of device activity in ubuntu v. kubuntu?

This symptom certainly isn't specific to any hardware and must be
caused by the specific applications that are polling the device via
alsa-lib.


> ---------- Forwarded message ----------
> From:*Alexander van Loon <a.vanloon@alexandervanloon.nl>
> To:*kubuntu-devel@lists.ubuntu.com
> Date:*Mon, 01 Mar 2010 14:05:51 +0100
> Subject:*PowerTOP: audio device active 100% of the time, how to file bug?
> Please see this – https://bugs.launchpad.net/ubuntu/+bug/521424 – bug
> report. To make a long story short: PowerTOP notices that one or two
> audio devices are active 100% of the time, thus causing unnecessary
> power consumption. However, this only occurred on Kubuntu 9.10, Ubuntu
> 9.10 wasn’t affected and had a significantly lower power consumption.
> The problem is still present on Kubuntu Lucid, both with the standard
> kernel and the 2.6.33 kernel. This was all tested with fresh
> installations.
>
> As you can read in my bug report, I spent quite some time researching
> this and figuring out what was going on, but I still wasn’t sure for
> which package I should file a bug report, and to whom it should be
> assigned, exactly because only Kubuntu seems to be affected. The bug
> report is a few weeks old now, without any response.

Please do not assign bugs to the ubuntu-audio team unless we
specifically request it. It's rather rude, and the torrential bugs
mean that your report is likely to slip through the cracks.

I've changed the affected source package to phonon -- yes, likely
incorrect -- in the hopes that someone more familiar with Kubuntu's
configuration can take a look.


> My question is, can anyone tell me to which person(s) I should bring
> this bug to attention, and what information I should provide in my bug
> report to help getting it fixed?

apport-collect -p alsa-base 521424

is a starting point, but I want to reiterate that this symptom isn't
an audio stack issue.

-Dan

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Old 03-02-2010, 09:20 PM
Alexander van Loon
 
Default PowerTOP: audio device active 100% of the time, how to file bug?

Thank you for your reply, I added the necessary information to the bug
report today.

Sorry for assigning it to the ubuntu-audio team, I had no idea it
wouldn’t be appreciated. Filing the bug against phonon was my first
guess too because that would be KDE-specific, but the bug triagers for
Phonon don’t seem to be active because no one responded for weeks.

You quote Mackenzie in your e-mail, but I haven’t seen the reply of that
person on the mailing list here? And how would I investigate which
applications are polling the device via alsa-lib?

On ma, 2010-03-01 at 10:08 -0500, Daniel Chen wrote:
> On Mon, Mar 1, 2010 at 9:49 AM, Mackenzie Morgan <macoafi@gmail.com> wrote:
> > interesting bug you might want to take a look at...
> > different levels of device activity in ubuntu v. kubuntu?
>
> This symptom certainly isn't specific to any hardware and must be
> caused by the specific applications that are polling the device via
> alsa-lib.
>
>
> > ---------- Forwarded message ----------
> > From: Alexander van Loon <a.vanloon@alexandervanloon.nl>
> > To: kubuntu-devel@lists.ubuntu.com
> > Date: Mon, 01 Mar 2010 14:05:51 +0100
> > Subject: PowerTOP: audio device active 100% of the time, how to file bug?
> > Please see this – https://bugs.launchpad.net/ubuntu/+bug/521424 – bug
> > report. To make a long story short: PowerTOP notices that one or two
> > audio devices are active 100% of the time, thus causing unnecessary
> > power consumption. However, this only occurred on Kubuntu 9.10, Ubuntu
> > 9.10 wasn’t affected and had a significantly lower power consumption.
> > The problem is still present on Kubuntu Lucid, both with the standard
> > kernel and the 2.6.33 kernel. This was all tested with fresh
> > installations.
> >
> > As you can read in my bug report, I spent quite some time researching
> > this and figuring out what was going on, but I still wasn’t sure for
> > which package I should file a bug report, and to whom it should be
> > assigned, exactly because only Kubuntu seems to be affected. The bug
> > report is a few weeks old now, without any response.
>
> Please do not assign bugs to the ubuntu-audio team unless we
> specifically request it. It's rather rude, and the torrential bugs
> mean that your report is likely to slip through the cracks.
>
> I've changed the affected source package to phonon -- yes, likely
> incorrect -- in the hopes that someone more familiar with Kubuntu's
> configuration can take a look.
>
>
> > My question is, can anyone tell me to which person(s) I should bring
> > this bug to attention, and what information I should provide in my bug
> > report to help getting it fixed?
>
> apport-collect -p alsa-base 521424
>
> is a starting point, but I want to reiterate that this symptom isn't
> an audio stack issue.
>
> -Dan
>



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Old 03-02-2010, 11:30 PM
Mackenzie Morgan
 
Default PowerTOP: audio device active 100% of the time, how to file bug?

On Tuesday 02 March 2010 5:20:05 pm Alexander van Loon wrote:
> You quote Mackenzie in your e-mail, but I haven’t seen the reply of that
> person on the mailing list here? And how would I investigate which
> applications are polling the device via alsa-lib?

I forwarded it to him in case he wasn't on the mailing list.

--
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apt-get moo

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Old 03-03-2010, 01:08 AM
Daniel Chen
 
Default PowerTOP: audio device active 100% of the time, how to file bug?

On Tue, Mar 2, 2010 at 5:20 PM, Alexander van Loon
<a.vanloon@alexandervanloon.nl> wrote:
> And how would I investigate which
> applications are polling the device via alsa-lib?

Roughly:
sudo fuser -v /dev/dsp* /dev/snd/* /dev/audio* /dev/mixer* /dev/seq*

More interestingly, I recommend that you download a recent daily-live
Kubuntu desktop image and install and use powertop. Lucid contains
more hooks for determining what is causing the symptom.

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Old 03-05-2010, 12:40 PM
Sebastian Kügler
 
Default PowerTOP: audio device active 100% of the time, how to file bug?

On Monday 01 March 2010 14:05:51 Alexander van Loon wrote:
> Please see this – https://bugs.launchpad.net/ubuntu/+bug/521424 – bug
> report. To make a long story short: PowerTOP notices that one or two
> audio devices are active 100% of the time, thus causing unnecessary
> power consumption. However, this only occurred on Kubuntu 9.10, Ubuntu
> 9.10 wasn’t affected and had a significantly lower power consumption.
> The problem is still present on Kubuntu Lucid, both with the standard
> kernel and the 2.6.33 kernel. This was all tested with fresh
> installations.
>
> As you can read in my bug report, I spent quite some time researching
> this and figuring out what was going on, but I still wasn’t sure for
> which package I should file a bug report, and to whom it should be
> assigned, exactly because only Kubuntu seems to be affected. The bug
> report is a few weeks old now, without any response.
>
> My question is, can anyone tell me to which person(s) I should bring
> this bug to attention, and what information I should provide in my bug
> report to help getting it fixed?

Have you tried using different phonon backends? (There might be a difference between
the xine and gstreamer backend, as we've seen in the past.)
--
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Old 03-12-2010, 07:10 AM
Alexander van Loon
 
Default PowerTOP: audio device active 100% of the time, how to file bug?

On vr, 2010-03-05 at 14:40 +0100, Sebastian Kügler wrote:
> On Monday 01 March 2010 14:05:51 Alexander van Loon wrote:
> > Please see this – https://bugs.launchpad.net/ubuntu/+bug/521424 – bug
> > report. To make a long story short: PowerTOP notices that one or two
> > audio devices are active 100% of the time, thus causing unnecessary
> > power consumption. However, this only occurred on Kubuntu 9.10, Ubuntu
> > 9.10 wasn’t affected and had a significantly lower power consumption.
> > The problem is still present on Kubuntu Lucid, both with the standard
> > kernel and the 2.6.33 kernel. This was all tested with fresh
> > installations.
> >
> > As you can read in my bug report, I spent quite some time researching
> > this and figuring out what was going on, but I still wasn’t sure for
> > which package I should file a bug report, and to whom it should be
> > assigned, exactly because only Kubuntu seems to be affected. The bug
> > report is a few weeks old now, without any response.
> >
> > My question is, can anyone tell me to which person(s) I should bring
> > this bug to attention, and what information I should provide in my bug
> > report to help getting it fixed?
>
> Have you tried using different phonon backends? (There might be a difference between
> the xine and gstreamer backend, as we've seen in the past.)
> --
> sebas
>
> http://www.kde.org | http://vizZzion.org | GPG Key ID: 9119 0EF9
>

Sorry for replying late, I didn’t use any backend other than the default
Xine Phonon backend, but I just tested it with the GStreamer backend.

I apt-getted phonon-backend-gstreamer, then went to System Settings →
Multimedia → Backend and preferred GStreamer over Xine there. Then I
rebooted and started PowerTOP, which still said that the audio devices
were active 100% of the time. Simply put, it didn’t make any difference.

Thank you for your attention for my problem. We met at the Dutch KDE 4.4
release party in Culemborg, by the way.

I hope anyone from the Kubuntu team could be bothered to at least reply
to my bug report, it’s been reported for over a month now but still no
comment. Are the Kubuntu team or the Phonon maintainers seriously
overworked or something?


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Old 03-12-2010, 02:01 PM
Daniel Chen
 
Default PowerTOP: audio device active 100% of the time, how to file bug?

On Fri, Mar 12, 2010 at 3:10 AM, Alexander van Loon
<a.vanloon@alexandervanloon.nl> wrote:
> I hope anyone from the Kubuntu team could be bothered to at least reply
> to my bug report, it’s been reported for over a month now but still no
> comment. Are the Kubuntu team or the Phonon maintainers seriously
> overworked or something?

I wasn't subscribed before (I am now). Please follow up in the bug report.

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