conflict between gnome-shell + metacity causes high CPU usage

[Mark A. Hershberger]

Binary package hint: gnome-shell

I was tracking down a high CPU problem and found gconfd-2 was writing lots of entries about /apps/metacity and /apps/mutter. The only place I knew mutter was used was gnome-shell. Sure enough, killing off gnome-shell fixed the problem.

My .xsession-errors file is filled with these messages:

Window manager warning: Failed to read saved session file /home/mah/.config/mutter/sessions/10271d4cce7681c10f125583173160536200000044310024.ms: Failed to open file '/home/mah/.config/mutter/sessions/10271d4cce7681c10f125583173160536200000044310024.ms': No such file or directory
Window manager warning: Screen 0 on display ":0.0" already has a window manager; try using the --replace option to replace the current window manager.
Window manager warning: Failed to read saved session file /home/mah/.config/mutter/sessions/10271d4cce7681c10f125583173160536200000044310024.ms: Failed to open file '/home/mah/.config/mutter/sessions/10271d4cce7681c10f125583173160536200000044310024.ms': No such file or directory
Window manager warning: Screen 0 on display ":0.0" already has a window manager; try using the --replace option to replace the current window manager.

ProblemType: Bug
Architecture: amd64
Date: Sat Oct 17 22:40:54 2009
DistroRelease: Ubuntu 9.10
Package: gnome-shell 2.28.0-0ubuntu2
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: gnome-shell
Uname: Linux 2.6.31-14-generic x86_64
XsessionErrors:
 (gnome-settings-daemon:4563): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:4622): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (gnome-terminal:4681): Gdk-WARNING **: XID collision, trouble ahead
 (Do:4671): Wnck-CRITICAL **: wnck_set_client_type got called multiple times.