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[bugbot <563366@xxxxxxxxxxxxxxxxxx>]

** Description changed:

  Binary package hint: xserver-xorg-video-intel
  
  Hello,
  
  My system works fine at the default depth of 24. However, if I create a
  /etc/X11/xorg.conf with the contents
  
  
  Section "Screen"
       Identifier "screen 1"
       DefaultDepth 16
  EndSection
  
  
  horizontal lines (looking like static on an old TV) show up when I am using Firefox on some pages. In particular, when I am using my organization's Zimbra webmail system moving the mouse over  message headers in the inbox causes those horizontal lines to appear. This always happens when the mouse is hovering over messages about half-way down the screen (center height).
  
  I also found another situation in which this happens. When I open gnome-
  terminal and then run jed to open a file with long lines of text around
  the center of the screen, moving the cursor over those center text lines
  causes the horizontal corruption to appear, too.
  
  None of this happens if I remove the /etc/X11/xorg.conf (ie, if I run at
  24 depth). Unfortunately 24bit depth prevents me from using some higher
  resolutions.
  
  Best
  
  lara
  
  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: xserver-xorg-video-intel 2:2.9.1-3ubuntu3
  ProcVersionSignature: Ubuntu 2.6.32-20.30-generic 2.6.32.11+drm33.2
  Uname: Linux 2.6.32-20-generic x86_64
  Architecture: amd64
  Date: Wed Apr 14 16:14:26 2010
  DkmsStatus:
   vboxdrv, 3.1.6, 2.6.32-20-generic, x86_64: installed 
   vboxnetadp, 3.1.6, 2.6.32-20-generic, x86_64: installed 
   vboxnetflt, 3.1.6, 2.6.32-20-generic, x86_64: installed
  InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100406.1)
  MachineType: Acer Aspire 1810TZ
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-20-generic root=UUID=aabe5f82-6b13-4361-9592-a8bd2fdc2370 ro quiet splash
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.utf8
   SHELL=/bin/bash
  SourcePackage: xserver-xorg-video-intel
  XorgConf:
   Section "Screen"
        Identifier "screen 1"
        DefaultDepth 16
   EndSection
  dmi.bios.date: 08/14/2009
  dmi.bios.vendor: INSYDE
  dmi.bios.version: v0.3115
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Base Board Product Name
  dmi.board.vendor: Acer
  dmi.board.version: Base Board Version
  dmi.chassis.type: 1
  dmi.chassis.vendor: Chassis Manufacturer
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnINSYDE:bvrv0.3115:bd08/14/2009:svnAcer:pnAspire1810TZ:pvrv0.3115:rvnAcer:rnBaseBoardProductName:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
  dmi.product.name: Aspire 1810TZ
  dmi.product.version: v0.3115
  dmi.sys.vendor: Acer
  glxinfo: Error: [Errno 2] No such file or directory
  system:
   distro:             Ubuntu
   codename:           lucid
   architecture:       x86_64
   kernel:             2.6.32-20-generic
+ 
+ [lspci]
+ 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
+     	Subsystem: Acer Incorporated [ALI] Device [1025:029b]

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https://bugs.launchpad.net/bugs/563366

Title:
  screen corruption when DefaultDepth = 16