ubuntu-x-swat team mailing list archive

[Robert Hooker <sarvatt@xxxxxxxxx>]

Sorry about that, there was a problem in the previous debdiff, new one
attached.


** Patch added: "xserver-xorg-video-intel_2.12.0-1ubuntu5.1.debdiff (fixed)"
   https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/654876/+attachment/1699567/+files/xserver-xorg-video-intel_2.12.0-1ubuntu5.1.debdiff

** Patch removed: "xserver-xorg-video-intel_2.12.0-1ubuntu5.1.debdiff"
   https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/654876/+attachment/1692570/+files/xserver-xorg-video-intel_2.12.0-1ubuntu5.1.debdiff

** Description changed:

  --- SRU JUSTIFICATION NOTES ---
  
  IMPACT: Sandy Bridge machines (with generation 6 intel GPUs) do not have
  code in the driver to handle Xv acceleration, but due to the way its
  coded it advertises that it works and attempts to use a generic GM45
  generation code path for it which hangs the system 100% of the time.
  This confuses gstreamer which does auto detection and every app that
  plays back video with it will hang the system unless Xv is forcibly
  disabled.
  
  RESOLUTION: Disable Xv only on this generation of devices by adding an
  XVideo option to the intel driver that only disables it on generation 6
  devices. The option was universally enabled previously.
  
  TEST CASE:
  1) Boot ubuntu maverick on a Sandy Bridge machine
  2) Launch gstreamer-properties
  3) Go to the video tab, under default output press "Test"
  4) System hangs without this fix. Switching the output to "X Window System (No Xv)" works correctly.
  
  REGRESSION POTENTIAL: Extremely low, this only changes the behavior for
  devices that match the IS_GEN6 macro which only contains Sandy Bridge
  devices.
  
  SRU PATCH PROPOSALS:
- https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/654876/+attachment/1692570/+files/xserver-xorg-video-intel_2.12.0-1ubuntu5.1.debdiff
+ https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/654876/+attachment/1699567/+files/xserver-xorg-video-intel_2.12.0-1ubuntu5.1.debdiff
  
  --- ORIGINAL DESCRIPTION ---
  
  Binary package hint: xserver-xorg-video-intel
  
  xserver-xorg-video-intel does not have support for Sandybridge Xv video
  acceleration, but it advertises support and attempting to use it is
  causing a system hang. Given that these devices will be released before
  11.04 is released, I believe it would be in our best interest to disable
  Xv for Maverick for a better user experience. The change only affects
  these specific devices (covered by the IS_GEN6 macro) so the regression
  potential is extremely low.
  
  Upstream addressed this issue in this commit:
  http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=8784c4f5a1524fb979b00c7ce7981cbc1dcf0ec0
  
  author	Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>	2010-10-01 20:40:36 (GMT)
  committer	 Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>	2010-10-01 20:45:15 (GMT)
  commit	8784c4f5a1524fb979b00c7ce7981cbc1dcf0ec0
  tree	d73f10e7631195c2ecb70d87aa7f3ba00da93e09
  parent	345c963e443ec325f1ff530512a356ddb318ff70
  
  video: Disable TextureAdaptor for Sandybridge
  The acceleration code does not yet exist, so we try to use gen4 shaders
  which hangs the chip and makes everybody upset. Disable it until such a
  time as support is written for Sandybridge XVideo.
  
  Reported-by: Matthias Hopf <mhopf@xxxxxxx>
  Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=30500
  Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
  
  Patch will follow soon and has been tested by me on 2 sandybridge
  machines to verify that desktop applications that autodetect Xv support
  no longer crash the system (cheese, totem visualizations, rhythmbox
  visualizer).

-- 
[Sandybridge] Attempting to use Xv textured video hangs the system.
https://bugs.launchpad.net/bugs/654876
You received this bug notification because you are a member of Ubuntu-X,
which is the registrant for xf86-video-intel.