Public bug reported:
Occasionally, the system freezes: display does not show mouse move,
clock display does not update itself, ssh impossible. But the machine
remains pingable. This lasts for 2 to 20 minutes.
This is with Ubuntu 16.04.2, now upgraded to kernel version
4.8.0-46-generic.
At the end of the freeze, a bunch of messages get written to
/var/log/syslog. Examples:
Aug 19 00:03:48 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Successfully demoted thread 2607 of
process 2275 (n/a).
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Successfully demoted thread 2606 of
process 2275 (n/a).
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Successfully demoted thread 2604 of
process 2275 (n/a).
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Successfully demoted thread 2275 of
process 2275 (n/a).
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 19 08:06:19 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Successfully demoted thread 2607 of
process 2275 (n/a).
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Successfully demoted thread 2606 of
process 2275 (n/a).
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Successfully demoted thread 2604 of
process 2275 (n/a).
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Successfully demoted thread 2275 of
process 2275 (n/a).
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Watchdog timeout
(limit 3min)!
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Main process exited,
code=killed, status=6/ABRT
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Unit entered failed
state.
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Failed with result
'signal'.
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Service has no
hold-off time, scheduling restart.
Aug 19 08:06:20 quimper systemd[1]: Stopped udev Kernel Device Manager.
Aug 19 08:06:20 quimper systemd[1]: Starting udev Kernel Device Manager...
Aug 19 08:06:24 quimper systemd[1]: Started udev Kernel Device Manager.
Aug 19 15:04:55 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Successfully demoted thread 2607 of
process 2275 (n/a).
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Successfully demoted thread 2606 of
process 2275 (n/a).
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Successfully demoted thread 2604 of
process 2275 (n/a).
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Successfully demoted thread 2275 of
process 2275 (n/a).
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 19 15:04:55 quimper systemd[1]: systemd-timesyncd.service: Watchdog timeout
(limit 3min)!
Aug 19 15:04:59 quimper systemd[1]: systemd-timesyncd.service: Main process
exited, code=killed, status=6/ABRT
Aug 19 15:04:59 quimper systemd[1]: systemd-timesyncd.service: Unit entered
failed state.
Aug 19 15:04:59 quimper systemd[1]: systemd-timesyncd.service: Failed with
result 'signal'.
Aug 19 15:05:00 quimper systemd[1]: systemd-timesyncd.service: Service has no
hold-off time, scheduling restart.
Aug 19 15:05:00 quimper systemd[1]: Stopped Network Time Synchronization.
Aug 19 15:05:00 quimper systemd[1]: Starting Network Time Synchronization...
Aug 19 15:05:00 quimper systemd[1]: Started Network Time Synchronization.
Aug 19 15:05:00 quimper systemd-timesyncd[26894]: Synchronized to time server
91.189.89.198:123 (ntp.ubuntu.com).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Successfully demoted thread 2607 of
process 2275 (n/a).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Successfully demoted thread 2606 of
process 2275 (n/a).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Successfully demoted thread 2604 of
process 2275 (n/a).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Successfully demoted thread 2275 of
process 2275 (n/a).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 20 15:09:22 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Watchdog timeout
(limit 3min)!
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Main process exited,
code=killed, status=6/ABRT
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Successfully demoted thread 2607 of
process 2275 (n/a).
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Unit entered failed
state.
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Successfully demoted thread 2606 of
process 2275 (n/a).
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Failed with result
'signal'.
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Successfully demoted thread 2604 of
process 2275 (n/a).
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Service has no
hold-off time, scheduling restart.
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Successfully demoted thread 2275 of
process 2275 (n/a).
Aug 20 15:09:26 quimper systemd[1]: Stopped udev Kernel Device Manager.
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 20 15:09:26 quimper systemd[1]: Starting udev Kernel Device Manager...
Aug 20 15:09:27 quimper systemd[1]: Started udev Kernel Device Manager.
The process the rtkit-daemon talks about is, in all cases,
/usr/bin/pulseaudio.
$ ps auxw | grep 2275
haible 2275 0.0 0.0 519164 8576 ? Sl Jul11 3:47
/usr/bin/pulseaudio --start --log-target=syslog
I have not used 'pavucontrol' on this machine in 3 months.
Info:
$ lsb_release -rd
Description: Ubuntu 16.04.2 LTS
Release: 16.04
$ apt-cache policy pulseaudio
pulseaudio:
Installed: 1:8.0-0ubuntu3.2
Candidate: 1:8.0-0ubuntu3.3
Version table:
1:8.0-0ubuntu3.3 500
500 http://de.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
*** 1:8.0-0ubuntu3.2 100
100 /var/lib/dpkg/status
1:8.0-0ubuntu3 500
500 http://de.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
** Affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1712858
Title:
system freezes occasionally for several minutes
Status in pulseaudio package in Ubuntu:
New
Bug description:
Occasionally, the system freezes: display does not show mouse move,
clock display does not update itself, ssh impossible. But the machine
remains pingable. This lasts for 2 to 20 minutes.
This is with Ubuntu 16.04.2, now upgraded to kernel version
4.8.0-46-generic.
At the end of the freeze, a bunch of messages get written to
/var/log/syslog. Examples:
Aug 19 00:03:48 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Successfully demoted thread 2607
of process 2275 (n/a).
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Successfully demoted thread 2606
of process 2275 (n/a).
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Successfully demoted thread 2604
of process 2275 (n/a).
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Successfully demoted thread 2275
of process 2275 (n/a).
Aug 19 00:03:48 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 19 08:06:19 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Successfully demoted thread 2607
of process 2275 (n/a).
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Successfully demoted thread 2606
of process 2275 (n/a).
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Successfully demoted thread 2604
of process 2275 (n/a).
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Successfully demoted thread 2275
of process 2275 (n/a).
Aug 19 08:06:19 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Watchdog timeout
(limit 3min)!
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Main process
exited, code=killed, status=6/ABRT
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Unit entered
failed state.
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Failed with result
'signal'.
Aug 19 08:06:20 quimper systemd[1]: systemd-udevd.service: Service has no
hold-off time, scheduling restart.
Aug 19 08:06:20 quimper systemd[1]: Stopped udev Kernel Device Manager.
Aug 19 08:06:20 quimper systemd[1]: Starting udev Kernel Device Manager...
Aug 19 08:06:24 quimper systemd[1]: Started udev Kernel Device Manager.
Aug 19 15:04:55 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Successfully demoted thread 2607
of process 2275 (n/a).
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Successfully demoted thread 2606
of process 2275 (n/a).
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Successfully demoted thread 2604
of process 2275 (n/a).
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Successfully demoted thread 2275
of process 2275 (n/a).
Aug 19 15:04:55 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 19 15:04:55 quimper systemd[1]: systemd-timesyncd.service: Watchdog
timeout (limit 3min)!
Aug 19 15:04:59 quimper systemd[1]: systemd-timesyncd.service: Main process
exited, code=killed, status=6/ABRT
Aug 19 15:04:59 quimper systemd[1]: systemd-timesyncd.service: Unit entered
failed state.
Aug 19 15:04:59 quimper systemd[1]: systemd-timesyncd.service: Failed with
result 'signal'.
Aug 19 15:05:00 quimper systemd[1]: systemd-timesyncd.service: Service has no
hold-off time, scheduling restart.
Aug 19 15:05:00 quimper systemd[1]: Stopped Network Time Synchronization.
Aug 19 15:05:00 quimper systemd[1]: Starting Network Time Synchronization...
Aug 19 15:05:00 quimper systemd[1]: Started Network Time Synchronization.
Aug 19 15:05:00 quimper systemd-timesyncd[26894]: Synchronized to time server
91.189.89.198:123 (ntp.ubuntu.com).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Successfully demoted thread 2607
of process 2275 (n/a).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Successfully demoted thread 2606
of process 2275 (n/a).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Successfully demoted thread 2604
of process 2275 (n/a).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Successfully demoted thread 2275
of process 2275 (n/a).
Aug 20 06:03:28 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 20 15:09:22 quimper rtkit-daemon[2276]: The canary thread is apparently
starving. Taking action.
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Watchdog timeout
(limit 3min)!
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Demoting known real-time threads.
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Main process
exited, code=killed, status=6/ABRT
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Successfully demoted thread 2607
of process 2275 (n/a).
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Unit entered
failed state.
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Successfully demoted thread 2606
of process 2275 (n/a).
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Failed with result
'signal'.
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Successfully demoted thread 2604
of process 2275 (n/a).
Aug 20 15:09:26 quimper systemd[1]: systemd-udevd.service: Service has no
hold-off time, scheduling restart.
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Successfully demoted thread 2275
of process 2275 (n/a).
Aug 20 15:09:26 quimper systemd[1]: Stopped udev Kernel Device Manager.
Aug 20 15:09:26 quimper rtkit-daemon[2276]: Demoted 4 threads.
Aug 20 15:09:26 quimper systemd[1]: Starting udev Kernel Device Manager...
Aug 20 15:09:27 quimper systemd[1]: Started udev Kernel Device Manager.
The process the rtkit-daemon talks about is, in all cases,
/usr/bin/pulseaudio.
$ ps auxw | grep 2275
haible 2275 0.0 0.0 519164 8576 ? Sl Jul11 3:47
/usr/bin/pulseaudio --start --log-target=syslog
I have not used 'pavucontrol' on this machine in 3 months.
Info:
$ lsb_release -rd
Description: Ubuntu 16.04.2 LTS
Release: 16.04
$ apt-cache policy pulseaudio
pulseaudio:
Installed: 1:8.0-0ubuntu3.2
Candidate: 1:8.0-0ubuntu3.3
Version table:
1:8.0-0ubuntu3.3 500
500 http://de.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
*** 1:8.0-0ubuntu3.2 100
100 /var/lib/dpkg/status
1:8.0-0ubuntu3 500
500 http://de.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1712858/+subscriptions
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