Public bug reported:
Binary package hint: gdm
I have this bug on both my computer and my laptop.
This effect me scine Ubuntu Lucid 10.04 alpha to now Beta 2 with all upgrade.
Steps to reproduce:
1. Login to user A.
2. Choose switch user from User A.
3. Login to user B.
4. Logout from user B.
After that the screen just go blank. The music from Rhythmbox of user A still
playing, I can't swith to tty1 (by ctrl + alt + F1), but I can use the Magic
SysRq key to reboot the system.
In my laptop it's usally happen, it rarely happen but exist in my computer. I
think this bug is very critical because I need to use many user for testing
application and translation of ubuntu.
There aren't any logs in my computer (except something about Pulse before the
crash).
And in my laptop has some logs
>From kern.log
Apr 12 20:06:47 truclk60145 kernel: [ 294.139885] [drm:drm_mode_getfb]
*ERROR* invalid framebuffer id
>From the daemon.log
Apr 12 20:06:28 truclk60145 gdm-simple-slave[1994]: WARNING: Unable to load
file '/etc/gdm/custom.conf': No such file or directory
Apr 12 20:06:29 truclk60145 acpid: client 1137[0:0] has disconnected
Apr 12 20:06:29 truclk60145 acpid: client connected from 1997[0:0]
Apr 12 20:06:29 truclk60145 acpid: 1 client rule loaded
Apr 12 20:06:32 truclk60145 gdm-session-worker[2037]: WARNING: Unable to load
file '/etc/gdm/custom.conf': No such file or directory
Apr 12 20:06:32 truclk60145 rtkit-daemon[1498]: Sucessfully made thread 2040 of
process 2040 (n/a) owned by '114' high priority at nice level -11.
Apr 12 20:06:32 truclk60145 rtkit-daemon[1498]: Supervising 4 threads of 2
processes of 2 users.
Apr 12 20:06:32 truclk60145 gdm-simple-greeter[2032]: Gtk-WARNING:
/build/buildd/gtk+2.0-2.20.0/gtk/gtkwidget.c:5636: widget not within a GtkWindow
Apr 12 20:06:33 truclk60145 rtkit-daemon[1498]: Sucessfully made thread 2045 of
process 2040 (n/a) owned by '114' RT at priority 5.
Apr 12 20:06:33 truclk60145 rtkit-daemon[1498]: Supervising 5 threads of 2
processes of 2 users.
Apr 12 20:06:33 truclk60145 rtkit-daemon[1498]: Sucessfully made thread 2047 of
process 2040 (n/a) owned by '114' RT at priority 5.
Apr 12 20:06:33 truclk60145 rtkit-daemon[1498]: Supervising 6 threads of 2
processes of 2 users.
Apr 12 20:06:33 truclk60145 gdm-session-worker[2037]: GLib-GObject-CRITICAL:
g_value_get_boolean: assertion `G_VALUE_HOLDS_BOOLEAN (value)' failed
Apr 12 20:06:36 truclk60145 rtkit-daemon[1498]: Sucessfully made thread 2140 of
process 2140 (n/a) owned by '1001' high priority at nice level -11.
Apr 12 20:06:36 truclk60145 rtkit-daemon[1498]: Supervising 7 threads of 3
processes of 3 users.
Apr 12 20:06:37 truclk60145 rtkit-daemon[1498]: Sucessfully made thread 2178 of
process 2140 (n/a) owned by '1001' RT at priority 5.
Apr 12 20:06:37 truclk60145 rtkit-daemon[1498]: Supervising 8 threads of 3
processes of 3 users.
Apr 12 20:06:37 truclk60145 rtkit-daemon[1498]: Sucessfully made thread 2179 of
process 2140 (n/a) owned by '1001' RT at priority 5.
Apr 12 20:06:37 truclk60145 rtkit-daemon[1498]: Supervising 9 threads of 3
processes of 3 users.
Apr 12 20:06:37 truclk60145 rtkit-daemon[1498]: Sucessfully made thread 2190 of
process 2190 (n/a) owned by '1001' high priority at nice level -11.
Apr 12 20:06:37 truclk60145 rtkit-daemon[1498]: Supervising 10 threads of 4
processes of 3 users.
Apr 12 20:06:47 truclk60145 acpid: client 1997[0:0] has disconnected
Apr 12 20:06:47 truclk60145 acpid: client connected from 1137[0:0]
Apr 12 20:06:47 truclk60145 acpid: 1 client rule loaded
>From the debug
Apr 12 20:06:32 truclk60145 rtkit-daemon[1498]: Supervising 4 threads of 2
processes of 2 users.
Apr 12 20:06:33 truclk60145 rtkit-daemon[1498]: Supervising 5 threads of 2
processes of 2 users.
Apr 12 20:06:33 truclk60145 rtkit-daemon[1498]: Supervising 6 threads of 2
processes of 2 users.
Apr 12 20:06:36 truclk60145 rtkit-daemon[1498]: Supervising 7 threads of 3
processes of 3 users.
Apr 12 20:06:37 truclk60145 rtkit-daemon[1498]: Supervising 8 threads of 3
processes of 3 users.
Apr 12 20:06:37 truclk60145 rtkit-daemon[1498]: Supervising 9 threads of 3
processes of 3 users.
Apr 12 20:06:37 truclk60145 rtkit-daemon[1498]: Supervising 10 threads of 4
processes of 3 users.
** Affects: gdm (Ubuntu)
Importance: Undecided
Status: New
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Logout after switch user cause black screen
https://bugs.launchpad.net/bugs/561538
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