Public bug reported:

Binary package hint: pulseaudio

When playing music for a longer period of time (>1h) or watching a
movie, I've experienced twice now that suddenly CPU Usage will go up to
100%, the mouse cursor will only skip around the screen when moving it -
any further action (starting a terminal, move to another desktop) will
completely freeze the system, so that it won't even respond to SysRq
keys - while the audio plays on in a loop. (last two seconds of the
audio or so)

While I'm not sure if this is exactly a pulseaudio bug, pulseaudio was the 
application that hinted me to file a bugreport in /var/log/syslog for 
snd_hda_intel, but there is no package for that.
While there is no log entry for the time of the freeze, I get a lot of these:

Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: snd_pcm_avail_delay() 
returned strange values: delay 0 is less than avail 112.
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: Most likely this is a bug 
in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA 
developers.
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: snd_pcm_dump():
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: Soft volume PCM
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: Control: PCM Playback 
Volume
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: min_dB: -51
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: max_dB: 0
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: resolution: 256
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: Its setup is:
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   stream       : CAPTURE
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   access       : 
MMAP_INTERLEAVED
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   format       : S16_LE
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   subformat    : STD
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   channels     : 2
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   rate         : 44100
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   exact rate   : 44100 
(44100/1)
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   msbits       : 16
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   buffer_size  : 88192
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   period_size  : 44096
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   period_time  : 999909
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   tstamp_mode  : ENABLE
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   period_step  : 1
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   avail_min    : 87310
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   period_event : 0
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   start_threshold  : -1
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   stop_threshold   : 
1444937728
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   silence_threshold: 0
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   silence_size : 0
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   boundary     : 
1444937728
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: Slave: Hardware PCM card 
0 'HDA Intel' device 0 subdevice 0
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c: Its setup is:
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   stream       : CAPTURE
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   access       : 
MMAP_INTERLEAVED
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   format       : S16_LE
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   subformat    : STD
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   channels     : 2
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   rate         : 44100
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   exact rate   : 44100 
(44100/1)
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   msbits       : 16
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   buffer_size  : 88192
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   period_size  : 44096
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   period_time  : 999909
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   tstamp_mode  : ENABLE
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   period_step  : 1
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   avail_min    : 87310
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   period_event : 0
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   start_threshold  : -1
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   stop_threshold   : 
1444937728
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   silence_threshold: 0
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   silence_size : 0
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   boundary     : 
1444937728
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   appl_ptr     : 87464
Jan 23 14:59:06 piBook pulseaudio[1418]: alsa-util.c:   hw_ptr       : 87464
Jan 23 14:59:09 piBook kernel: [   39.240780] cfg80211: Found new beacon on 
frequency: 2472 MHz (Ch 13) on phy0
Jan 23 14:59:21 piBook gdm-session-worker[1411]: GLib-GObject-CRITICAL: 
g_value_get_boolean: assertion `G_VALUE_HOLDS_BOOLEAN (value)' failed
Jan 23 14:59:24 piBook NetworkManager[897]: <error> [1295791164.560937] 
[nm-manager.c:1317] user_proxy_init(): could not init user settings proxy: (3) 
Could not get owner of name 'org.freedesktop.NetworkManagerUserSettings': no 
such name
Jan 23 14:59:24 piBook NetworkManager[897]: <error> [1295791164.649923] 
[nm-manager.c:1317] user_proxy_init(): could not init user settings proxy: (3) 
Could not get owner of name 'org.freedesktop.NetworkManagerUserSettings': no 
such name
Jan 23 14:59:27 piBook kernel: [   57.016024] Skipping EDID probe due to cached 
edid
Jan 23 14:59:27 piBook kernel: [   57.041017] Skipping EDID probe due to cached 
edid
Jan 23 14:59:27 piBook kernel: [   57.057036] Skipping EDID probe due to cached 
edid
Jan 23 14:59:27 piBook kernel: [   57.084027] Skipping EDID probe due to cached 
edid
Jan 23 14:59:27 piBook rtkit-daemon[1420]: Successfully made thread 2231 of 
process 2231 (n/a) owned by '1000' high priority at nice level -11.
Jan 23 14:59:27 piBook rtkit-daemon[1420]: Supervising 4 threads of 2 processes 
of 2 users.
Jan 23 14:59:28 piBook rtkit-daemon[1420]: Successfully made thread 2249 of 
process 2231 (n/a) owned by '1000' RT at priority 5.
Jan 23 14:59:28 piBook rtkit-daemon[1420]: Supervising 5 threads of 2 processes 
of 2 users.
Jan 23 14:59:28 piBook rtkit-daemon[1420]: Successfully made thread 2250 of 
process 2231 (n/a) owned by '1000' RT at priority 5.
Jan 23 14:59:28 piBook rtkit-daemon[1420]: Supervising 6 threads of 2 processes 
of 2 users.
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: snd_pcm_avail_delay() 
returned strange values: delay 0 is less than avail 80.
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: Most likely this is a bug 
in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA 
developers.
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: snd_pcm_dump():
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: Soft volume PCM
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: Control: PCM Playback 
Volume
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: min_dB: -51
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: max_dB: 0
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: resolution: 256
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: Its setup is:
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   stream       : CAPTURE
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   access       : 
MMAP_INTERLEAVED
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   format       : S16_LE
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   subformat    : STD
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   channels     : 2
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   rate         : 44100
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   exact rate   : 44100 
(44100/1)
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   msbits       : 16
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   buffer_size  : 88192
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   period_size  : 44096
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   period_time  : 999909
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   tstamp_mode  : ENABLE
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   period_step  : 1
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   avail_min    : 87310
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   period_event : 0
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   start_threshold  : -1
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   stop_threshold   : 
1444937728
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   silence_threshold: 0
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   silence_size : 0
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   boundary     : 
1444937728
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: Slave: Hardware PCM card 
0 'HDA Intel' device 0 subdevice 0
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c: Its setup is:
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   stream       : CAPTURE
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   access       : 
MMAP_INTERLEAVED
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   format       : S16_LE
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   subformat    : STD
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   channels     : 2
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   rate         : 44100
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   exact rate   : 44100 
(44100/1)
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   msbits       : 16
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   buffer_size  : 88192
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   period_size  : 44096
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   period_time  : 999909
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   tstamp_mode  : ENABLE
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   period_step  : 1
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   avail_min    : 87310
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   period_event : 0
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   start_threshold  : -1
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   stop_threshold   : 
1444937728
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   silence_threshold: 0
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   silence_size : 0
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   boundary     : 
1444937728
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   appl_ptr     : 61240
Jan 23 14:59:29 piBook pulseaudio[2231]: alsa-util.c:   hw_ptr       : 61240


The last lines logged before the freeze are

Jan 23 14:18:37 piBook wpa_supplicant[1115]: Failed to initiate AP scan.
Jan 23 14:23:19 piBook pulseaudio[3144]: alsa-sink.c: ALSA woke us up to write 
new data to the device, but there was actually nothing to write!
Jan 23 14:23:19 piBook pulseaudio[3144]: alsa-sink.c: Most likely this is a bug 
in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA 
developers.
Jan 23 14:23:19 piBook pulseaudio[3144]: alsa-sink.c: We were woken up with 
POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value 
< min_avail.
Jan 23 14:25:34 piBook wpa_supplicant[1115]: WPA: Group rekeying completed with 
00:0c:43:25:61:00 [GTK=CCMP]
Jan 23 14:25:34 piBook NetworkManager[869]: <info> (wlan0): supplicant 
connection state:  completed -> group handshake
Jan 23 14:25:34 piBook NetworkManager[869]: <info> (wlan0): supplicant 
connection state:  group handshake -> completed
Jan 23 14:28:27 piBook wpa_supplicant[1115]: Failed to initiate AP scan.
Jan 23 14:34:27 piBook wpa_supplicant[1115]: Failed to initiate AP scan.
Jan 23 14:35:35 piBook wpa_supplicant[1115]: WPA: Group rekeying completed with 
00:0c:43:25:61:00 [GTK=CCMP]
Jan 23 14:35:35 piBook NetworkManager[869]: <info> (wlan0): supplicant 
connection state:  completed -> group handshake
Jan 23 14:35:35 piBook NetworkManager[869]: <info> (wlan0): supplicant 
connection state:  group handshake -> completed
Jan 23 14:42:27 piBook wpa_supplicant[1115]: Failed to initiate AP scan.
Jan 23 14:42:37 piBook wpa_supplicant[1115]: Failed to initiate AP scan.
Jan 23 14:45:35 piBook wpa_supplicant[1115]: WPA: Group rekeying completed with 
00:0c:43:25:61:00 [GTK=CCMP]
Jan 23 14:45:35 piBook NetworkManager[869]: <info> (wlan0): supplicant 
connection state:  completed -> group handshake
Jan 23 14:45:35 piBook NetworkManager[869]: <info> (wlan0): supplicant 
connection state:  group handshake -> completed
Jan 23 14:55:36 piBook wpa_supplicant[1115]: WPA: Group rekeying completed with 
00:0c:43:25:61:00 [GTK=CCMP]
Jan 23 14:55:36 piBook NetworkManager[869]: <info> (wlan0): supplicant 
connection state:  completed -> group handshake
Jan 23 14:55:36 piBook NetworkManager[869]: <info> (wlan0): supplicant 
connection state:  group handshake -> completed
Jan 23 14:56:27 piBook wpa_supplicant[1115]: Failed to initiate AP scan.
Jan 23 14:58:40 piBook kernel: imklog 4.2.0, log source = /proc/kmsg started. 
<- reboot
Jan 23 14:58:40 piBook rsyslogd: [origin software="rsyslogd" swVersion="4.2.0" 
x-pid="595" x-info="http://www.rsyslog.com";] (re)start
Jan 23 14:58:40 piBook rsyslogd: rsyslogd's groupid changed to 103
Jan 23 14:58:40 piBook rsyslogd: rsyslogd's userid changed to 101
Jan 23 14:58:40 piBook rsyslogd-2039: Could no open output file '/dev/xconsole' 
[try http://www.rsyslog.com/e/2039 ]
Jan 23 14:58:40 piBook kernel: [    0.000000] Initializing cgroup subsys cpuset
Jan 23 14:58:40 piBook kernel: [    0.000000] Initializing cgroup subsys cpu

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: pulseaudio 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu21.1
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic 2.6.35.8
Uname: Linux 2.6.35-24-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  benpicco   2231 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfc400000 irq 47'
   Mixer name   : 'Realtek ALC883'
   Components   : 'HDA:10573055,10573055,00100700 
HDA:10ec0883,17340000,00100002'
   Controls      : 28
   Simple ctrls  : 17
Date: Sun Jan 23 15:05:08 2011
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcEnviron:
 PATH=(custom, no user)
 LANG=de_DE.utf8
 SHELL=/bin/bash
SourcePackage: pulseaudio
dmi.bios.date: 06/24/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 1.11C
dmi.board.name: F43
dmi.board.vendor: FUJITSU SIEMENS
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU SIEMENS
dmi.modalias: 
dmi:bvnPhoenixTechnologiesLTD:bvr1.11C:bd06/24/2008:svnFUJITSUSIEMENS:pnAMILOPi2515:pvr20:rvnFUJITSUSIEMENS:rnF43:rvr:cvnFUJITSUSIEMENS:ct10:cvr:
dmi.product.name: AMILO Pi 2515
dmi.product.version: 20
dmi.sys.vendor: FUJITSU SIEMENS

** Affects: pulseaudio (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 maverick

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https://bugs.launchpad.net/bugs/706589

Title:
  System freezes when playing audio for a longer time

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