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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: trusty
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https://bugs.launchpad.net/bugs/1315669
Title:
Kernel Panic caused by pulseaudio
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
Happens with:
OS: Ubuntu 14.04 LTS, Gnome-Flashback
Kernels: 3.13.0, 3.13.11, 3.14.1, 3.15.0
Pulseaudio: 1:4.0-0ubuntu11
Mainboard: Gigabyte GA-Z77X-UD3H
Audio: Onboard VIA VT2021
Does NOT happen with same hardware and Ubuntu 12.04.4, Kernels 3.12.13
and earlier.
Symptoms:
(1) Greeter / Login screen unresponsive for 5..10s,
(2) After logon, desktop unresponsive for 5..60s before panels etc. show up
and mouse pointer appears,
(3) (1) and (2) occasionally accompanied by Pulseaudio causing up to 100% CPU
load
(4) Kernel panic at shutdown/restart or when attempting to kill pulseaudio
(1) and (2) happen approx. 8 out of 10 times. switching to tty while
desktop is unresponsive, top shows high cpu load for pulseaudio. kill
-9 of pulseaudio causes kernel panic in most of the cases. Also,
"pulseaudio -k" causes kernel panic. Kernel panic also occurs on each
system shutdown/restart.
When deactivating onboard sound in BIOS, (1)-(3) do not occur, but (4)
still happens.
After removing pulseaudio (incl. associated packages) via apt-get, all of the
above symptoms are gone.
Switching kernels makes no difference. Ubuntu 12.04.4 (Kernels 3.12.13 and
earlier, pulseaudio 1:1.1-0ubuntu15.4) is running fine on the same hardware.
I've attached a camera screenshot of one of the panics. Please let me
know how I can help debugging this issue.
lsb_release -rd
Description: Ubuntu 14.04 LTS
Release: 14.04
apt-cache policy pulseaudio
pulseaudio:
Installed: 1:4.0-0ubuntu11
Candidate: 1:4.0-0ubuntu11
Version table:
*** 1:4.0-0ubuntu11 0
500 http://de.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
100 /var/lib/dpkg/status
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