My session on vt7 had been hidden, while a second user session had been running on vt8. The second user logged out, and the display came back to my session, showing LDM with 'click to log in'. I clicked, and on return to my session, compiz crashed. It restarted automatically, with my applications still running and apport popped up. (Though Firefox windows were visually corrupted, I had to quit the app.)
Don't know if these circumstances could be relevant: there had been unusual memory pressure on the system; the second session had had a giant firefox instance running, and the system was into swap, for the first time I can remember. The other user's programs were all done, and the system was paging things around while I resumed my session.
On another occasion, returning to my session had left a white screen; apps were running but inacessible. I considered that an instance of bug 966744, but I'm not too sure.
I can't try to reproduce this right now, but hope to have a chance soon. Thanks.
Intel video drivers on Ivy Bridge HD4000 graphics.
ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: compiz-core 1:0.9.8+bzr3249-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-9.9-generic 3.5.0
Uname: Linux 3.5.0-9-generic x86_64
ApportVersion: 2.4-0ubuntu6
Architecture: amd64
CrashCounter: 1
Date: Tue Aug 14 00:01:52 2012
ExecutablePath: /usr/bin/compiz
ProcCmdline: compiz
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SegvAnalysis:
Segfault happened at: 0x7f20c8c15120 <gdk_property_change>: mov 0x18(%rdi),%rax
PC (0x7f20c8c15120) ok
source "0x18(%rdi)" (0x00000018) not located in a known VMA region (needed readable region)!
destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
gdk_property_change (window=0x0, property=0x68, type=0x4, format=32, mode=GDK_PROP_MODE_REPLACE, data=0x204dfc0 "\224", nelements=10) at /build/buildd/gtk+3.0-3.5.10/./gdk/gdkwindow.c:11360
_gtk_selection_request (widget=0x1e8e6d0, event=0x7f20a402e180) at /build/buildd/gtk+3.0-3.5.10/./gtk/gtkselection.c:2453
_gtk_marshal_BOOLEAN__BOXEDv (closure=0x10aaa70, return_value=0x7fff6dcc3450, instance=0x1e8e6d0, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x10aaaa0) at /build/buildd/gtk+3.0-3.5.10/./gtk/gtkmarshalers.c:130
_g_closure_invoke_va (closure=0x10aaa70, return_value=0x7fff6dcc3450, instance=0x1e8e6d0, args=0x7fff6dcc3618, n_params=1, param_types=0x10aaaa0) at /build/buildd/glib2.0-2.33.8/./gobject/gclosure.c:840
g_signal_emit_valist (instance=0x1e8e6d0, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fff6dcc3618) at /build/buildd/glib2.0-2.33.8/./gobject/gsignal.c:3211
Title: compiz crashed with SIGSEGV in gdk_property_change()
UpgradeStatus: Upgraded to quantal on 2012-06-14 (60 days ago)
UserGroups: adm cdrom dip lpadmin nopasswdlogin plugdev sambashare sudo
StacktraceTop:
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