I have similar problems after upgrading from Hardy to Lucid. Sound always stops after playing movies or using other applications for a few seconds/minutes regardless of the application used (I broke the sound with mplayer, vlc, totem and even the Multimedia System Selector app sound test).
Once broken, I can get sound back if I restart pulseaudio with:
$ pulseaudio --kill; pulseaudio --start
Sound always worked well in Hardy except for some glitches regarding sound control.
dmesg doesn't show anything new besides these two pulseaudio segfaults which seems to have occurred during two of the numerous times I broke the sound while testing:
[60980.859078] pulseaudio[27646]: segfault at 7fe6f35df1a0 ip 00007fe6f35df1a0 sp 00007fffffb95518 error 14 in pulse-shm-2848538534[7fe6f3c03000+4001000]
[65109.280919] pulseaudio[874]: segfault at 7fd0f20fc1f0 ip 00007fd0f20fc1f0 sp 00007fffcca81438 error 14 in pulse-shm-4084731526[7fd0f2720000+4001000]
I have similar problems after upgrading from Hardy to Lucid. Sound always stops after playing movies or using other applications for a few seconds/minutes regardless of the application used (I broke the sound with mplayer, vlc, totem and even the Multimedia System Selector app sound test).
Once broken, I can get sound back if I restart pulseaudio with:
$ pulseaudio --kill; pulseaudio --start
Sound always worked well in Hardy except for some glitches regarding sound control.
Each time sound breaks, I see this in syslog:
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: snd_pcm_delay() returned a value that is exceptionally large: 8574853690509206496 bytes (360287948221 ms).
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers.
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: snd_pcm_dump():
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: Soft volume PCM
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: Control: PCM Playback Volume
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: min_dB: -51
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: max_dB: 0
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: resolution: 256
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: Its setup is:
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: stream : CAPTURE
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: access : MMAP_INTERLEAVED
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: format : S16_LE
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: subformat : STD
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: channels : 2
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: rate : 48000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: exact rate : 48000 (48000/1)
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: msbits : 16
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: buffer_size : 96000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: period_size : 48000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: period_time : 1000000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: tstamp_mode : ENABLE
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: period_step : 1
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: avail_min : 48000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: period_event : 0
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: start_threshold : -1
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: stop_threshold : 6755399441055744000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: silence_threshold: 0
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: silence_size : 0
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: boundary : 6755399441055744000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: Slave: Hardware PCM card 0 'HDA VIA VT82xx' device 0 subdevice 0
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: Its setup is:
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: stream : CAPTURE
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: access : MMAP_INTERLEAVED
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: format : S16_LE
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: subformat : STD
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: channels : 2
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: rate : 48000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: exact rate : 48000 (48000/1)
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: msbits : 16
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: buffer_size : 96000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: period_size : 48000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: period_time : 1000000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: tstamp_mode : ENABLE
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: period_step : 1
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: avail_min : 48000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: period_event : 0
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: start_threshold : -1
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: stop_threshold : 6755399441055744000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: silence_threshold: 0
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: silence_size : 0
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: boundary : 6755399441055744000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: appl_ptr : 2880000
Apr 27 02:55:15 dermoth pulseaudio[32250]: alsa-util.c: hw_ptr : 1825528
As for the hardware I run on, you can see attachments for this bug which I reported today... /bugs.launchpad .net/bugs/ 570454
https:/
dmesg doesn't show anything new besides these two pulseaudio segfaults which seems to have occurred during two of the numerous times I broke the sound while testing: 2848538534[ 7fe6f3c03000+ 4001000] 4084731526[ 7fd0f2720000+ 4001000]
[60980.859078] pulseaudio[27646]: segfault at 7fe6f35df1a0 ip 00007fe6f35df1a0 sp 00007fffffb95518 error 14 in pulse-shm-
[65109.280919] pulseaudio[874]: segfault at 7fd0f20fc1f0 ip 00007fd0f20fc1f0 sp 00007fffcca81438 error 14 in pulse-shm-
Please let me know if you need more info.