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[bugbot <589140@xxxxxxxxxxxxxxxxxx>]

** Description changed:

  Binary package hint: xserver-xorg-video-intel
  
  Hi,
  
  I am experiencing problems with the VGA Output in 10.04 (lucid), but it
  worked fine in 9.10 (karmic). I did a clean installation, not an
  upgrade, but could verify that the problems are not there in 9.10 by
  using the livecd. I have tried many of the suggested KMS-related
  workarounds (including disabling DRI, using glasen's 855gm-fix ppa,
  disabling KMS on boot etc.) and also tried x-updates and x-retro PPAs to
  use driver 2.8 and 2.11 instead of 2.9. However, the problem with the
  black screen went away, but with *each* of the various combinations I
  get screen flickering on the VGA output, when screen updates are made
  (i.e. keyboard input or mouse movement).
  
  I am using the 1024x768 resolution on the internal screen, and also
  1024x768 on the external output. I tried this with 2 beamers and one
  external monitor - the same problem persists everywhere. When I change
  the external output's resolution to a higher resolution like 1152x862 or
  1280x1024, the problems are gone. By switching to a lower resolution
  (i.e. 800x600), the problems still persist.
  
  I have tried various of the intel driver's options (disabling DRI,
  pageflip, using UXA rendering etc.) but none of my attempts was
  successful in adressing this problem.
  
  I have attached a demonstration video of the problem and the system
  information collected by apport.
+ 
+ [lspci]
+  [    2.220800] agpgart-intel 0000:00:00.0: Intel 855GM Chipset
+  [    2.221207] agpgart-intel 0000:00:00.0: detected 8060K stolen memory
+  [    2.223422] agpgart-intel 0000:00:00.0: AGP aperture is 128M @ 0xe0000000
+  00:00.0 Host bridge [0600]: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller [8086:3580] (rev 02)
+      	Subsystem: IBM Device [1014:055c]
+  00:02.0 VGA compatible controller [0300]: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582] (rev 02)
+      	Subsystem: IBM Device [1014:0557]
+  00:02.0 VGA compatible controller [0300]: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582] (rev 02)
+      	Subsystem: IBM Device [1014:0557]
+  P: /devices/pci0000:00/0000:00:00.0
+  E: DEVPATH=/devices/pci0000:00/0000:00:00.0
+  E: PCI_SLOT_NAME=0000:00:00.0
+  KERNEL[1275565668.048724] add      /devices/pci0000:00/0000:00:00.0 (pci)
+  DEVPATH=/devices/pci0000:00/0000:00:00.0
+  PCI_SLOT_NAME=0000:00:00.0
+  UDEV  [1275565668.061234] add      /devices/pci0000:00/0000:00:00.0 (pci)
+  DEVPATH=/devices/pci0000:00/0000:00:00.0
+  PCI_SLOT_NAME=0000:00:00.0

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https://bugs.launchpad.net/bugs/589140

Title:
  [i855gm] VGA out flickering after upgrade to lucid (regression)