Xorg freeze upon clicking maximize button

[Andrew Okin]

Binary package hint: xorg

System appears to freeze whenever I click the maximize button in a window.

I expected the window to maximize, instead, the system froze. I fixed by dropping to a shell via Ctrl + Alt + F1, logging in, and running sudo shutdown now, then rebooting. Other methods of maximizing the window, such as keyboard shortcuts and double clicking the title bar of the window appear to work, however the maximize button does not. This bug occurs in the Unity desktop, I have not tried it on GNOME yet, so I am not sure if it's an issue with Unity or the whole system.

Ubuntu 11.04 Natty Narwhal

xorg:
  Installed: 1:7.6+4ubuntu3
  Candidate: 1:7.6+4ubuntu3
  Version table:
 *** 1:7.6+4ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty/main i386 Packages
        100 /var/lib/dpkg/status

unity:
  Installed: 3.8.2-0ubuntu1
  Candidate: 3.8.2-0ubuntu1
  Version table:
 *** 3.8.2-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty/main i386 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x800
 edid-base64:
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Thu Apr 7 10:29:01 2011
DistUpgraded: Log time: 2011-04-06 11:33:42.682334
DistroCodename: natty
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller [8086:2592] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Sony Corporation Device [104d:81b8]
   Subsystem: Sony Corporation Device [104d:81b8]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
Lsusb:
 Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Sony Corporation VGN-FS742
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=9103f40d-b481-43cb-a875-8f989ea94b09 ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to natty on 2011-04-06 (0 days ago)
dmi.bios.date: 07/10/2005
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: R0080J1
dmi.chassis.asset.tag: Reserved
dmi.chassis.type: 10
dmi.chassis.vendor: Reserved
dmi.chassis.version: Reserved
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR0080J1:bd07/10/2005:svnSonyCorporation:pnVGN-FS742:pvrC300PJYU:cvnReserved:ct10:cvrReserved:
dmi.product.name: VGN-FS742
dmi.product.version: C300PJYU
dmi.sys.vendor: Sony Corporation
version.compiz: compiz 1:0.9.4+bzr20110406-0ubuntu1
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.1-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu6
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu6

[Bryce Harrington (bryce)]

Please reproduce on Classic Desktop (no effects).

There is no indication in the X or kernel logs that the GPU froze. I do notice this though:

[ 74.635] (WW) intel(0): I830DRI2FlipEventHandler: Pageflip completion has impossible msc 16777964 < target_msc 16777965
[ 110.336] (WW) intel(0): I830DRI2FlipEventHandler: Pageflip completion has impossible msc 16780111 < target_msc 16780112
[ 252.351] (WW) intel(0): I830DRI2FlipEventHandler: Pageflip completion has impossible msc 16788658 < target_msc 16788659
[ 270.890] (WW) intel(0): I830DRI2FlipEventHandler: Pageflip completion has impossible msc 16789774 < target_msc 16789775
[ 280.682] (WW) intel(0): I830DRI2FlipEventHandler: Pageflip completion has impossible msc 16790363 < target_msc 16790364

However the varying timestamps suggest these messages aren't related to the freeze. You could try tailing Xorg.0.log in an ssh session, and reproduce the bug to see if the message correlates to the freeze, but I'm guessing not.