lightdm freeze

[CPKS]

Until yesterday I was using 11.04. Unity worked fine with GDM. Then I installed 11.10.

After boot, lightdm puts up the greeter OK. If I select "Ubuntu-2D" (Unity 2D) from the login box, then after a 30-second wait I have a usable Unity desktop. However, the network indicator falsely states that networking is disabled. If I log out, lightdm freezes (I get the text-mode screen with "checking battery state" etc). When I examine the process list, it seems that there are two lightdm processes, one of which is preventing the other from restarting. If I kill them, lightdm restarts.

If I try to log in using Unity-3D, however, there is a long wait before the desktop appears. I get no launcher bar on the left - not even when I press the "windows" key. Nor does the rightmost logout widget appear on the top bar. I have a similar problem on logout - no greeter appears and I'm left in an unresponsive text mode screen.

If I kill all the lightdm processes and start gdm, everything is fine. I can start Unity-3D and indeed any other desktop with no problems. And it's much, much quicker.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xorg 1:7.6+7ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,place,compiztoolbox,resize,session,gnomecompat,imgpng,grid,wall,snap,regex,move,vpswitch,animation,unitymtgrabhandles,fade,workarounds,expo,scale,ezoom,unityshell]
CompositorRunning: compiz
Date: Sat Nov 5 15:16:36 2011
DistUpgraded: Log time: 2011-11-05 04:30:35.495595
DistroCodename: oneiric
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GpuHangFrequency: Several times a day
GpuHangReproducibility: Yes, I can easily reproduce it
GpuHangStarted: Immediately after installing this version of Ubuntu
GraphicsCard:
 Intel Corporation 4 Series Chipset Integrated Graphics Controller [8086:2e32] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Giga-byte Technology Device [1458:d000]
   Subsystem: Giga-byte Technology Device [1458:d000]
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: Gigabyte Technology Co., Ltd. G41M-ES2H
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=5b26e5a7-78bb-4a12-ade8-3c543bbe23ae ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UdevDb: Error: [Errno 2] No such file or directory
UpgradeStatus: Upgraded to oneiric on 2011-11-05 (0 days ago)
dmi.bios.date: 05/26/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F1
dmi.board.name: G41M-ES2H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF1:bd05/26/2009:svnGigabyteTechnologyCo.,Ltd.:pnG41M-ES2H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnG41M-ES2H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: G41M-ES2H
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu5
version.ia32-libs: ia32-libs 20090808ubuntu26
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Einar (christian-einarsson)]

I have something similar here.

My lightdm is configured to autologin to an xbmc-standalone session. When I exit xbmc I expect to end up at the lightdm greeter, instead i get a black screen and the cross shaped mouse pointer.

Looking i the process list I see two lightdm processes, if i kill the younger one (higher pid) lightdm wakes up and gives me the greeter. If I kill the older one both processes dies and I have to run 'sudo start lightdm' which launches lightdm which in turn launches the xbmc session.

[Launchpad Janitor (janitor)]

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

[Robert Ancell (robert-ancell)]

Closing assumed fixed.