Fixed as per https://bugs.freedesktop.org/show_bug.cgi?id=19215#c26 .

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https://bugs.launchpad.net/bugs/320771

Title:
  [X1950] Vertical bands of interference around HW cursor

Status in xserver-xorg-driver-ati:
  Invalid
Status in xserver-xorg-video-ati package in Ubuntu:
  Fix Released

Bug description:
  After changing monitors, I've removed the proprietary ATI drivers and
  switched to the open source ones to allow me to run the monitors at
  different resolutions.  Since doing this I'm noticing bands of
  graphical interference around the mouse cursor.

  It looks to me like the interference bands are 20 pixels wide, and repeated 
every 250 pixels across the screen, on both screens.  Locations I've measured 
(very approximately) are:
  1770 - 1989
  2025 - 2045
  2290 - 2299
  2540 - 2559

  With the mouse cursor in any vertical position on one of these bands,
  a bunch of small flickering horizontal lines appear within the band,
  running from the right hand edge of the mouse cursor, to the right
  side of the band.

  The lines don't move around, with the mouse cursor in any one spot you
  get 2-3 lines that just constantly flicker between black and white.

  This is on a ATI 1950 (PCI-e), with the first screen running at
  1280x1024, and the second 1680x1050.  I'm running Ubuntu 8.10, and
  apart from the Intel graphics driver update released today, it's fully
  patched and up to date.

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