unity-2d-launcher crashed with SIGSEGV in __run_exit_handlers()

[Dmitry Shachnev]

Unity 2D launcher crashed on exit.

Duplicate: Unity 2D launcher crashes when "Ubuntu" (3D) session is requested, leaving no unity launcher at all. (Perhaps Unity 3D refuses to run on my machine and tries to fallback to 2D?) But it doesn't crash when a "Ubuntu 2D" session is specifically requested at the login screen.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-2d-launcher 4.12.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu3
Architecture: i386
CrashCounter: 1
Date: Thu Oct 13 19:39:24 2011
ExecutablePath: /usr/bin/unity-2d-launcher
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100318)
ProcCmdline: unity-2d-launcher
ProcEnviron:
 LANGUAGE=ru:en
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 LC_MESSAGES=ru_RU.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x313934 <__run_exit_handlers+68>: mov 0x8(%edx),%edx
 PC (0x00313934) ok
 source "0x8(%edx)" (0x9185ad08) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 __run_exit_handlers (status=1, listp=0x459324, run_list_atexit=true) at exit.c:50
 __GI_exit (status=1) at exit.c:100
 _IceDefaultIOErrorHandler () from /usr/lib/i386-linux-gnu/libICE.so.6
 _IceRead () from /usr/lib/i386-linux-gnu/libICE.so.6
 IceProcessMessages () from /usr/lib/i386-linux-gnu/libICE.so.6
Title: unity-2d-launcher crashed with SIGSEGV in __run_exit_handlers()
UpgradeStatus: Upgraded to oneiric on 2011-09-02 (41 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev nopasswdlogin plugdev sambashare tape video

[Apport retracing service (apport)]

StacktraceTop:
 __run_exit_handlers (status=1, listp=0x459324, run_list_atexit=true) at exit.c:50
 __GI_exit (status=1) at exit.c:100
 _IceDefaultIOErrorHandler (iceConn=0x87db6a8) at ../../src/error.c:602
 _IceRead (iceConn=0x87db6a8, nbytes=8, ptr=<optimized out>) at ../../src/misc.c:292
 IceProcessMessages (iceConn=0x87db6a8, replyWait=0x0, replyReadyRet=0x0) at ../../src/process.c:151

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alan Jenkins (aj504)]

This is happening every time I try to log *in* as "Ubuntu" (i.e. I'm actually requesting Unity 3D). It doesn't happen if I request "Ubuntu 2D" directly.

I don't think it happened originally (earlier today). But I'm not sure why.

I did enable the Orca Screen Reader & switch to gdm, but switching back to lightdm and disabling Orca doesn't seem to help

After Unity has crashed, I'm left with only a window manager + nautilus (on the background); there's actually no way to log out! This should probably be considered a separate bug, although I'm not sure what the best solution would be.

[Gerry Boland (gerboland)]

Hi Alan,
can you tell what window manager you are running when you're logged in as Ubuntu?

FYI, if it helps, you should be able to hit Ctrl+Alt+T to bring up a terminal, and type "gnome-session-quit" to log out.

[Alan Jenkins (aj504)]

I can't reproduce this now :(.

When I successfully log in as "Ubuntu", I can see compiz is running. (When I run "Ubuntu 2D", I can see that metacity is running). But I didn't notice which was running when the problem was happening.

(And I use a more general & easier to remember recovery method: Alt+SysRq+K).

[dino99 (9d9)]

This version has expired long time ago, and is no more supported