IA__gdk_screen_get_monitor_geometry: assertion `monitor_num < screen_x11->n_monitors'

[Marcus Bauer]

Sporadically when FireFox is opening a new URL, x11 is being destroyed, sessions is being terminated, login dialog pops up.
This always occurs only when FireFox is doing smth.
Log:
gdm-simple-greeter[2246]: Gdk-CRITICAL: IA__gdk_screen_get_monitor_geometry: assertion `monitor_num < screen_x11->n_monitors' failed
gdm-simple-greeter[2246]: last message repeated 21 times

Kernel: 2.6.38-8-generic, x86
FireFox: 6.0, but problems happened also for 5.0.

[Timothy Mayoh (timothy-m-deactivatedaccount)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:

apport-collect 839776

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Marcus Bauer (marcus-bauer-9157)]

I won't do it.

apport-collect tries to send too much private information. For instance "disk/by-uuid" IDs. If you need some specific logs, please let me know.

[Marcus Bauer (marcus-bauer-9157)]

Today it has happened again. A couple of tabs were open in FireFox. After opening a new URL the session has been terminated.

gdm-simple-slave[4255]: WARNING: Unable to load file '/etc/gdm/custom.conf': No such file or directory
acpid: client connected from 4259[0:0]
acpid: 1 client rule loaded
pulseaudio[4257]: pid.c: Stale PID file, overwriting.
pulseaudio[4257]: main.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-G0B2r5OcTS: Connection refused

[Marcus Bauer (marcus-bauer-9157)]

... and again.
Interesting - "widget not within a GtkWindow".

:39:23 gdm-simple-slave[3381]: WARNING: Unable to load file '/etc/gdm/custom.conf': No such file or directory
:39:23 acpid: client connected from 3383[0:0]
:39:23 acpid: 1 client rule loaded
:39:25 gdm-session-worker[3438]: WARNING: Unable to load file '/etc/gdm/custom.conf': No such file or directory
:39:25 rtkit-daemon[1374]: Successfully made thread 3444 of process 3444 (n/a) owned by '106' high priority at nice level -11.
:39:25 rtkit-daemon[1374]: Supervising 1 threads of 1 processes of 1 users.
:39:25 rtkit-daemon[1374]: Successfully made thread 3447 of process 3444 (n/a) owned by '106' RT at priority 5.
:39:25 rtkit-daemon[1374]: Supervising 2 threads of 1 processes of 1 users.
:39:25 rtkit-daemon[1374]: Successfully made thread 3448 of process 3444 (n/a) owned by '106' RT at priority 5.
:39:25 rtkit-daemon[1374]: Supervising 3 threads of 1 processes of 1 users.
:39:25 gdm-simple-greeter[3435]: Gtk-WARNING: /build/buildd/gtk+2.0-2.24.4/gtk/gtkwidget.c:5687: widget not within a GtkWindow
:39:26 gdm-session-worker[3438]: GLib-GObject-CRITICAL: g_value_get_boolean: assertion `G_VALUE_HOLDS_BOOLEAN (value)' failed
:39:32 gdm-session-worker[3438]: pam_sm_authenticate: Called

[Timo Aaltonen (tjaalton)]

There's nothing 'private' in the UUID's of your disks.. And the logs snippets you've provided don't help. Please get a proper backtrace:

https://wiki.ubuntu.com/X/Backtracing

[bugbot (bugbot)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.

[Marcus Bauer (marcus-bauer-9157)]

"There's nothing 'private' in the UUID's of your disks"

Is your SSN or your address a private information or not? Sure it is private. It is unique and it identifies you. The same is true about disk UUID. It is unique. It identifies you. That's why it is private.

Sure, paranoiac can change disk UUIDs regularly. I am not. I just don't want to disclose such information.

Back to the problem. It still exists.
Sometimes login dialog is out of the screen and I have to type without seeing the dialog. Sometimes after logging in the screen is flickering and only killing the X helps. In such cases I see similar messages regarding gdm failures. I install Linux updates regularly. Graphics drivers seem to be up-to-date, I failed to find anything newer. Chipset: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller