Public bug reported:

Binary package hint: unity

Simply login into a Natty "Ubuntu" session (Thus Compiz with Unity
plugin) and launch a KDE app. Upon loading or doing some activity in the
KDE app the interface will appear to hang but the mouse continues to
work. It is not a hard lock as I can jump to a terminal (ctrl+alt+f1) or
restart the Xorg server with alt+SysRq+k. Switching back from a terminal
to the graphic session sometimes leaves the appearance of the terminal
on the screen but the mouse pointer is there and still works and appears
to be a painting update issue with the desktop.

Note not all KDE apps will cause the interface hang. Kate seems to work just 
fine. Apps that cause the issue every time are:
* KDevelop. As soon as KDevelop begins to load (shows the splash screen) the 
desktop interface will hang.
* Krita. The Template selection/Recent document screen works just fine but as 
soon as you try to load a template or actual krita document the interface will 
hang. Some times when the interface has stalled (It still shows the template 
selection screen and any window that was showng at the time) if I move the 
cursor around it changes to Krita's paint brush cursor and back to the normal 
pointer in other areas as if the Krita window was actually there.

When the interface stalls I've tried pressing alt-f2 and typing
"metacity --replace" in order to restart a window manager but this does
not work. It has in the past (previous ubuntu releases) when I have
experienced similar issues with compiz not updating the screen.

These KDE apps work just fine if I login with the "Ubuntu classic
desktop" (Compiz enabled, Unity plug-in disabled) session. The whole
session seems quite stable. Also works fine in a KDE Plasma desktop
session.

I've tried different combinations of Compiz plugins but the interface
stalls every time with those KDE apps no matter what compiz plugins I
have enabled.

I will update the report with a few more KDE apps that cause the same
problem.

If you need me to run some more tests, or can tell me how I can capture
some more debugging information (or where to read up on it), I'll try to
do so.

This is on an Intel Core2 duo laptop with x3100 gpu, 32bit Ubuntu Natty
install with PAE kernel. I have another system, AMD Phenom, Nvidia 460
GPU with Natty 64bit installed that runs the same KDE apps in Unity just
fine. When I get the chance, I have another system with Natty 32 bit
installed (Athlon Xp, Nvidia GPU) that I will test to see if it is a
general 32bit issue or maybe more of a Intel GPU specific issue.

Thanks

Adam

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.6-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Uname: Linux 2.6.38-8-generic-pae i686
Architecture: i386
CompizPlugins: 
[core,bailer,detection,composite,opengl,decor,place,compiztoolbox,regex,imgpng,vpswitch,move,animation,grid,expo,gnomecompat,resize,mousepoll,commands,snap,unitymtgrabhandles,session,wall,fade,workarounds,scale,thumbnail,ezoom,scaleaddon,unityshell,switcher]
CompositorRunning: compiz
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: Off
 modes: 1280x800
 edid-base64:
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1920x1080 1680x1050 1600x900 1280x1024 1280x1024 1280x960 1152x864 
1280x720 1152x720 1024x768 1024x768 832x624 800x600 800x600 640x480 640x480 
720x400
 edid-base64: 
AP///////wAJ0V54RVQAAC8TAQMONR14LmCFplZKnCUSUFSla4BxAIHAgUCBgKnAswDRwAEBAjqAGHE4LUBYLEUA3QwRAAAeAAAA/wBQQjkwMTkzN1NMMDAwAAAA/QAyTBhTEQAKICAgICAgAAAA/ABHMjQyMEhEQkwKCgoKAEY=
Date: Thu Apr 14 12:13:06 2011
DistUpgraded: Log time: 2011-04-07 19:07:35.489157
DistroCodename: natty
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) 
[8086:2a02] (rev 0c) (prog-if 00 [VGA controller])
   Subsystem: Sony Corporation Device [104d:9015]
   Subsystem: Sony Corporation Device [104d:9015]
MachineType: Sony Corporation VGN-CR11S_L
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic-pae 
root=UUID=20443279-212b-48e4-815d-64a791d9c125 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
ProcVersionSignature__: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Renderer: Unknown
SourcePackage: unity
UpgradeStatus: Upgraded to natty on 2011-04-07 (6 days ago)
dmi.bios.date: 07/25/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: R0231Q0
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnPhoenixTechnologiesLTD:bvrR0231Q0:bd07/25/2008:svnSonyCorporation:pnVGN-CR11S_L:pvr01:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VGN-CR11S_L
dmi.product.version: 01
dmi.sys.vendor: Sony Corporation
version.compiz: compiz 1:0.9.4+bzr20110411-0ubuntu1
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu1
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
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:0.0.16+git20110107+b795ca6e-0ubuntu7

** Affects: unity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug compiz-0.9 i386 natty running-unity ubuntu

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https://bugs.launchpad.net/bugs/760587

Title:
  Screen interface hangs when running some KDE apps in Unity compiz

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