/usr/lib/gnome-settings-daemon/gnome-settings-daemon hogs CPU

[أحمد المحمودي (Ahmed El-Mahmoudy)]

While I am on a GNOME Shell session, gnome-settings-daemon would start hogging the CPU (using 100% of a CPU core). This doesn't necessarily from the beginning of the session, rather it usually happens after an hour or so of the session.

Note, I have been experiencing this problem since Oneiric, and still having this problem in Precise.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-settings-daemon 3.3.91-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94.1-0ubuntu1
Architecture: amd64
Date: Thu Mar 8 14:07:22 2012
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426)
SourcePackage: gnome-settings-daemon
UpgradeStatus: Upgraded to precise on 2012-03-04 (3 days ago)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please try to obtain a backtrace following the instructions at http://wiki.ubuntu.com/DebuggingProgramCrash and upload the backtrace (as an attachment) to the bug report. This will greatly help us in tracking down your problem.

[أحمد المحمودي (Ahmed El-Mahmoudy) (aelmahmoudy)]

Backtrace for /usr/lib/gnome-settings-daemon/gnome-settings-daemon

Funny thing is that I wasn't able to attach to the process unless I used sudo (although the process was owned by my user!!)

Another funny thing is that after detaching (or maybe that happened after attaching), the process stopped hogging the CPU.

[Jakob Unterwurzacher (jakobunt)]

Merging the bugs, will link to your backtrace,
thanks

[Sebastien Bacher (seb128)]

> Backtrace for /usr/lib/gnome-settings-daemon/gnome-settings-daemon

hum, that stacktrace has no useful info, it seems to just be waiting in poll() which it what it does when not busy

> Funny thing is that I wasn't able to attach to the process unless I used sudo (although the process was owned by my user!!)

that's a security protection, ptrace can't be used by normal users

> Another funny thing is that after detaching (or maybe that happened after attaching), the process stopped hogging the CPU.

weird

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.