[Expired for xorg-server (Ubuntu) because there has been no activity for
60 days.]

** Changed in: xorg-server (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/892677

Title:
  X server freeze

Status in “xorg-server” package in Ubuntu:
  Expired

Bug description:
  I'm getting X freezes that matches the description of the problem
  listed here: https://wiki.ubuntu.com/X/Troubleshooting/Freeze on a new
  ubuntu 11.10 install on a Thinkpad T60. The freeze has happened on
  several occasions: a few times while on wifi with libreoffice and
  firefox open, other times when the laptop was idle with only firefox
  running on ethernet.

  dmesg says:

  [ 4824.350997] NMI: PCI system error (SERR) for reason a1 on CPU 0.
  [ 4824.351003] Dazed and confused, but trying to continue
  [ 6277.219752] BUG: unable to handle kernel NULL pointer dereference at   
(null)
  [ 6277.219760] IP: [<f82278ee>] radeon_read_ring_rptr+0x1e/0x30 [radeon]

  Xorg.0.log says:

  [  4836.859] [mi] EQ overflowing. The server is probably stuck in an
  infinite loop.

  dmesg, lspci and Xorg.0.log attached.

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