I managed to reproduce the problem today (using Ubuntu 11.04 _without_ natty-updates). It seems the root cause may be a bug in ALSA after all. PulseAudio complained in syslog:
Jul 11 11:47:16 leon pulseaudio[1810]: alsa-util.c: snd_pcm_avail() a retourné une valeur qui est exceptionnellement large : 2922048 octets (15219 ms). Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: Il s'agit très probablement d'un bogue dans le pilote ALSA « snd_hda_intel ». Veuillez rapporter ce problème aux développeurs d'ALSA. Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: snd_pcm_dump(): Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: Hardware PCM card 0 'HDA Intel' device 0 subdevice 0 Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: Its setup is: Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: stream : PLAYBACK Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: access : MMAP_INTERLEAVED Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: format : S16_LE Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: subformat : STD Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: channels : 2 Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: rate : 48000 Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: exact rate : 48000 (48000/1) Jul 11 11:49:31 leon pulseaudio[1810]: alsa-util.c: msbits : 16 Jul 11 11:49:46 leon pulseaudio[1810]: alsa-util.c: buffer_size : 96000 Jul 11 11:49:47 leon pulseaudio[1810]: alsa-util.c: period_size : 48000 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: period_time : 1000000 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: tstamp_mode : ENABLE Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: period_step : 1 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: avail_min : 95617 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: period_event : 0 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: start_threshold : -1 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: stop_threshold : 1572864000 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: silence_threshold: 0 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: silence_size : 0 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: boundary : 1572864000 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: appl_ptr : 394960 Jul 11 11:49:48 leon pulseaudio[1810]: alsa-util.c: hw_ptr : 1152000 Jul 11 11:50:10 leon pulseaudio[1810]: alsa-util.c: snd_pcm_delay() a retourné une valeur qui est exceptionnellement large : -42434976 octets (-221015 ms). Jul 11 11:50:10 leon pulseaudio[1810]: alsa-util.c: Il s'agit très probablement d'un bogue dans le pilote ALSA « snd_hda_intel ». Veuillez rapporter ce problème aux développeurs d'ALSA. Jul 11 11:50:10 leon pulseaudio[1810]: alsa-util.c: snd_pcm_dump(): Jul 11 11:50:10 leon pulseaudio[1810]: alsa-util.c: Hardware PCM card 0 'HDA Intel' device 0 subdevice 0 Jul 11 11:50:10 leon pulseaudio[1810]: alsa-util.c: Its setup is: Jul 11 11:50:10 leon pulseaudio[1810]: alsa-util.c: stream : PLAYBACK Jul 11 11:50:10 leon pulseaudio[1810]: alsa-util.c: access : MMAP_INTERLEAVED Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: format : S16_LE Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: subformat : STD Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: channels : 2 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: rate : 48000 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: exact rate : 48000 (48000/1) Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: msbits : 16 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: buffer_size : 96000 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: period_size : 48000 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: period_time : 1000000 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: tstamp_mode : ENABLE Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: period_step : 1 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: avail_min : 95617 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: period_event : 0 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: start_threshold : -1 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: stop_threshold : 1572864000 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: silence_threshold: 0 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: silence_size : 0 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: boundary : 1572864000 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: appl_ptr : 406192 Jul 11 11:50:11 leon pulseaudio[1810]: alsa-util.c: hw_ptr : 11088001 Jul 11 11:54:18 leon pulseaudio[1810]: module-alsa-card.c: Failed to find a working profile. Jul 11 11:54:18 leon pulseaudio[1810]: module.c: Failed to load module "module-alsa-card" (argument: "device_id="29" name="platform-thinkpad_acpi" card_name="alsa_card.platform-thinkpad_acpi" tsched=yes ignore_dB=no card_properties="module-udev-detect.discovered=1""): initialization failed. The snd_pcm_avail() and snd_pcm_delay() values were definitely bogus... So I'm starting to suspect that a "small" bug in VLC triggers the issue, but the real problem lies in ALSA? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/743323 Title: vlc memory leak To manage notifications about this bug go to: https://bugs.launchpad.net/vlc/+bug/743323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
