Hmm,  looks like HSW reintroduced MI_LOAD_SCAN_LINES. Wonderful.

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https://bugs.launchpad.net/bugs/1156679

Title:
   [Ubuntu13.04]GPU hang after set the resolution rate on all sharkbay
  platforms

Status in “xserver-xorg-video-intel” package in Ubuntu:
  Incomplete

Bug description:
  SharkBay(Desktop):
  BIOS:HSWLPTU1.86C.0092.R02.1209220303
  Kernel: 3.8.0-12-generic
  OS: Ubuntu Raring Ringtail (development branch)

  SharkBay(Mobile):
  BIOS:HSWLPTU1.86C.0097.R00.1210222040
  Kernel: 3.8.0-12-generic
  OS: Ubuntu Raring Ringtail (development branch)

  SharkBay-ULT:
  BIOS: HSWLPTU1.86C.0087.R01.1208151750
  CPU: Pre-release Intel MCP processor code named Hasswell M,(2+2) 2 
cores,GT2,B0
  Chipset :Lynx Point-LP A0(QDBY)
  Baseboard: Intel ULT board code named Whitetip Mountain Fab 3.
  Kernel: 3.8.0-12-generic
  OS: Ubuntu Raring Ringtail (development branch)

  Details:
  whatever set the resolution by "xrandr -s [0..3]" or by the GUI to set the
  resolution, the screen will become garbage screen. And the demsg will appear
  "[drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung"

  Reproducible: always

  Steps to Reproduce:
  1.login the system
  2.set the resolution

  Actual Results: 
  Garbage screen became.

  Reason: It is the issue of xf86-video-intel package, upstream xf86
  -video-intel hasn't this issue. Both of them have a version of 2.21.4,
  I compared the source code of ubuntu 13.04 and upstream xf86-video-
  intel, they are the same. But the configure.ac files are different.

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