Sometimes the window manager just stops accepting any input. For example, clicking on a different window or pressing alt+tab does not change the window focus. Super+S works, Super+W does not.
This can be fixed temporarily by restarting unity with "unity --replace", but once it starts happening it tends to re-break pretty quickly.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.14-0ubuntu1~natty1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,resize,move,regex,snap,place,grid,compiztoolbox,mousepoll,vpswitch,animation,imgpng,resizeinfo,workarounds,gnomecompat,unitymtgrabhandles,wall,expo,session,ezoom,staticswitcher,fade,scale,unityshell]
Date: Sat Jun 25 12:37:15 2011
DistUpgraded: Log time: 2011-06-14 15:57:29.860817
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
nvidia-current, 270.41.06, 2.6.38-8-generic, x86_64: installed
fglrx, 8.841, 2.6.38-8-generic, x86_64: installed
fglrx, 8.841, 2.6.35-28-generic, x86_64: installed
GraphicsCard:
ATI Technologies Inc Radeon HD 5800 Series (Cypress LE) [1002:689e] (prog-if 00 [VGA controller])
Subsystem: Micro-Star International Co., Ltd. Device [1462:2092]
JockeyStatus: xorg:fglrx - ATI/AMD proprietary FGLRX graphics driver (Proprietary, Enabled, In use)
Lsusb:
Bus 002 Device 004: ID 046d:0a1f Logitech, Inc.
Bus 002 Device 003: ID 046d:c069 Logitech, Inc.
Bus 002 Device 002: ID 046d:c312 Logitech, Inc. DeLuxe 250 Keyboard
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: MSI MS-7309
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=106088f7-9a8c-49a2-aea4-367edf42643b ro nopat quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic 2.6.38.2
ProcVersionSignature__: Ubuntu 2.6.38-8.42-generic 2.6.38.2
SourcePackage: unity
UpgradeStatus: Upgraded to natty on 2011-06-14 (10 days ago)
dmi.bios.date: 07/15/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V2.0
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: K9N6PGM2-V2 (MS-7309)
dmi.board.vendor: MSI
dmi.board.version: 2.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 2.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.0:bd07/15/2009:svnMSI:pnMS-7309:pvr2.0:rvnMSI:rnK9N6PGM2-V2(MS-7309):rvr2.0:cvnMSI:ct3:cvr2.0:
dmi.product.name: MS-7309
dmi.product.version: 2.0
dmi.sys.vendor: MSI
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty1
version.fglrx-installer: fglrx-installer N/A
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
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 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7
After experiencing this bug in Natty, I upgraded to Oneiric and it still happens constantly.
The problem can be temporally fixed by right clicking to get a context menu, but the window manager will re-break as soon as I interact with non-window-manger controls at all.