ubuntu-x-swat team mailing list archive

[Robert Hooker <sarvatt@xxxxxxxxx>]

** Description changed:

  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).
  
- 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).
+ 
+ --- 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

** 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
+ 
+ --- 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).
- 
- 
- --- 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

-- 
[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.