[Bug 316000] Re: [iGM45, Intrepid] Screen corruption when enabling/disabling external monitor with compiz

[Bryce Harrington]

** Description changed:

  Binary package hint: xserver-xorg-video-intel
  
  Steps to reproduce
  1) Start laptop (Lenovo T400) with external monitor disconnected.
  2) Log into Gnome with compiz enabled
  3) Plug in external monitor
  4) Enable external monitor (Mirror Screens is unchecked) in the Screen Resolutions Utility and click apply.
  
  When this happens I expect my desktop to be extended to the external
  monitor. Instead the screen is corrupted (photo attached). In this state
  the mouse pointer moves, but the rest of the screen is frozen. Further
  I'm unable switch tty. By killing X (ctrl-alt-bksp) I return to GDM.
  When I log in again, my desktop is extended across both monitors
  properly with compiz enabled.
  
  Further Information
  This bug does not occur if compiz is not enabled. To get compiz working with dual monitors I applied the patch found in  bug 146859. I installed the drivers found in http://ppa.launchpad.net/intel-gfx-testing/ubuntu, but the bug had manifested itself BEFORE those drivers were installed.
  
  ProblemType: Bug
  Architecture: amd64
  DistroRelease: Ubuntu 8.10
  Package: xserver-xorg-video-intel 2:2.5.1-1ubuntu5~intrepid
  ProcEnviron:
   PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersion: Linux version 2.6.27-11-generic (buildd at crested) (gcc version 4.3.2 (Ubuntu 4.3.2-1ubuntu11) ) #1 SMP Thu Jan 8 08:38:38 UTC 2009
  
  SourcePackage: xserver-xorg-video-intel
  Uname: Linux 2.6.27-11-generic x86_64
  UnreportableReason: This is not a genuine Ubuntu package
  xkbcomp:
+ 
+ [lspci]
+ 00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
+     	Subsystem: Lenovo Device [17aa:20e0]
+ 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
+     	Subsystem: Lenovo Device [17aa:2112]

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[iGM45,Intrepid] Screen corruption when enabling/disabling external monitor with compiz
https://bugs.launchpad.net/bugs/316000
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