Public bug reported:
Binary package hint: pulseaudio
**Problem description**
Steps to replicate problem:
Boot up the computer and play music in an audio player like Banshee or
Rhythmbox.
Expected results:
Music comes out of the speakers
Actual results:
No music comes out of the speakers. Restarting pulseaudio makes it work, but
audio is stuttery
**Further details**
I'm running the development Ubuntu Jaunty on an Acer Aspire One A150-Ab,
and since installing Jaunty (around new years) it has been running
perfectly. Unfortunately I did a dist-upgrade last night for the first
time in about a week, and a number of audio problems surfaced that seem
related to pulseaudio.
When I boot up, I hear the Ubuntu login noise (the jungle beat thing)
but from there, any application started will not play any audio. Banshee
will look like it's playing audio, but nothing is coming out of the
speakers/headphones. I used alsamixer to manually check the volume/mute
status of all the mixers, and they're all fine.
If I open the sound preferences by double clicking the volume control in
the notification area, I notice that there are no devices in the
"Output" tab to select from. There is however a "HDA Intel - ALC278
Analog" device in the Input tab.
I found that to get it working, I had to open a shell and type:
$ killall pulseaudio
$ pulseaudio
Then it would work. Opening the sound preference shows the device "HDA
Intel - ALC278 Analog" also in the Output tab now, rather than just
Input, and the balance/volume/etc. controls work as expected.
It's not perfect, though, because in the shell pulseaudio is running, I
frequently (perhaps once every 10 minutes or so) get the following error
in red:
E: module-alsa-sink.c: ALSA woke us up to write new data to the device,
but there was actually nothing to write! Most likely this is an ALSA
driver bug .Please report this issue to the ALSA developers. We were
woken up with POLLOUT set -- however a subsequent snd_pcm_avail_update()
returned 0.
At startup, there are a few messages about pulseaudio increasing the
wakeup watermark:
N: module-alsa-sink.c: Increasing wakeup watermark to 40.00ms
N: module-alsa-sink.c: Increasing wakeup watermark to 80.00ms
N: module-alsa-sink.c: Increasing wakeup watermark to 160.00ms
N: module-alsa-sink.c: Increasing wakeup watermark to 177.01ms
The audio is also fairly jumpy, with audio-less gaps of about 0.5
seconds a few times a minute on average and lots of various pops and
clicks. Occasionally it repeats about 0.2 seconds of what's playing
about 3-4 times, stops playing anything for about half a second then
carries on as normal. These times aren't consistent, however, and it can
go for about 10 mintues without a stutter occasionally, then stutter 3
times in quick succession. The stuttering isn't associated with the
messages on the command line, nor is it associated with usage. Intensive
computer usage will cause the same amount of stuttering as blanking the
screen and just listening to music with it.
To confirm, none of these problems occured until I updated last night,
even though I've been running Jaunty for a while. Some update in the
last week must have changed how audio behaves.
**System information**
Stock Aspire One A150-Ab (1.6GHz Atom N270, 1GB RAM)
Software versions
ubuntu jaunty 32-bit (development branch) 9.04
kernel uname -r: 2.6.28-6-generic
linux-image-2.6.28-6: 2.6.28-6.16
pulseaudio 0.9.14-0ubuntu2
rhyhtmbox 0.11.6svn20090108-0ubuntu1
banshee 1.4.2-1ubuntu1
libasound2 1.0.18-1ubuntu3
lspci reports the hardware as Intel Corporation 82801G (ICH7 family)
High Definition Audio Controller(rev 02). I shall get a full list when I
get home (At work currently).
$ asoundconf list
Names of available sound cards:
Intel
** Affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
--
Pulseaudio daemon needs manual kill/restart every boot on HDA Intel ICH7
https://bugs.launchpad.net/bugs/322760
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
