Ubuntu

Unity segfaults while changing Display mode with External Display

Reported by Christopher Townsend on 2012-01-13
22
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Unity
High
Unassigned
compiz (Ubuntu)
High
Unassigned
unity (Ubuntu)
High
Unassigned

Bug Description

Environment:
 Oneiric + Unity 4.28 SRU from the ubuntu-desktop PPA
External Display was connected over VGA to Dell Latitude Laptop

I was testing external/internal display switching by pressing Fn+F8
After 87 times system lost Launcher and top Panel
When using Unity 4.24 that would happen after 8 cycles - so there is huge improvement
During testing there was a delay 4 times in updating Displays mode. First 3 times system finally recovered after ~15 sec delay.

In syslog and kernd there are 4 segfaults:

I got 4 segfaults, system recovered after first 3 visually it was like
a delay in switching with screens on both displays without panel and
launcher

Jan 11 10:42:02 kernel: [ 126.268566] compiz[1812]:
segfault at ffffffff ip 00007fe9239540b5 sp 00007fff200e72a0 error 4
in libglib-2.0.so.0.3000.0[7fe9238f4000+f4000]
Jan 11 10:43:33 kernel: [ 217.536868] compiz[3097]:
segfault at ffffffff ip 00007f60853940b5 sp 00007fff7c4b1490 error 4
in libglib-2.0.so.0.3000.0[7f6085334000+f4000]
Jan 11 10:45:01 kernel: [ 305.256376] compiz[4022]:
segfault at ffffffff ip 00007f1aa60e70b5 sp 00007ffff61e3bb0 error 4
in libglib-2.0.so.0.3000.0[7f1aa6087000+f4000]
Jan 11 10:46:45 kernel: [ 410.098040] compiz[4930]:
segfault at ffffffff ip 00007ffc022fb0b5 sp 00007fff40cfe7b0 error 4
in libglib-2.0.so.0.3000.0[7ffc0229b000+f4000]
Jan 11 10:47:11 kernel: [ 436.065829] compiz[6021]:
segfault at 18 ip 00007fd51cf17e2f sp 00007fffa62d2b50 error 4 in
libunity-core-4.0.so.4.0.0[7fd51cecd000+74000]

Changed in unity:
status: New → Confirmed
Changed in compiz (Ubuntu):
status: New → Confirmed
Changed in unity (Ubuntu):
status: New → Confirmed
Sebastien Bacher (seb128) wrote :

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.

Changed in unity (Ubuntu):
importance: Undecided → High
status: Confirmed → Incomplete
Changed in compiz (Ubuntu):
status: Confirmed → Incomplete
Changed in unity:
status: Confirmed → Incomplete
Changed in compiz (Ubuntu):
importance: Undecided → High
Changed in unity:
importance: Undecided → High
Sebastien Bacher (seb128) wrote :

is that still happening in precise?

Launchpad Janitor (janitor) wrote :

[Expired for compiz (Ubuntu) because there has been no activity for 60 days.]

Changed in compiz (Ubuntu):
status: Incomplete → Expired
Launchpad Janitor (janitor) wrote :

[Expired for unity because there has been no activity for 60 days.]

Changed in unity:
status: Incomplete → Expired
Launchpad Janitor (janitor) wrote :

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]

Changed in unity (Ubuntu):
status: Incomplete → Expired
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