kernel-packages team mailing list archive

[Januszmk6 <1041790@xxxxxxxxxxxxxxxxxx>]

(In reply to comment #100)
> I have, I think, a reliable way to trigger this behavior, if that helps. It
> requires a non-trivial setup, though.
> 
> I have gnome-shell running on dual monitors. The first is 1920x1200, the
> second is 1920x1080 (not sure if the resolution difference matters). If I
> run a full-screen game on The 1920x1200 monitor, I get freezes, and notes in
> the dmesg about hangcheck timers and kickrings ("stuck wait on blitter
> ring").
> 
> I believe OpenGL acceleration of the desktop is important, because the
> freezes are not triggered in fluxbox, for instance. I'm not sure if the game
> itself needs to be using OpenGL, or if the full-screen window is the
> triggering factor, or something else entirely. It is important that the game
> keep the monitors distinct, and only go full screen on one. I just tried it
> on Battle for Wesnoth, and full screen there sets the monitors to mirror,
> which doesn't trigger the problem.
> 
> This is on an i7 4770, if that matters.
> 
> I realize this is may be difficult to put together for a test setup, but I
> thought I'd mention it.

I also have dual monitors and also gnome-shell, but I have on both
1920x1080px. I notice that when I am watching some videos on full screen
on one monitor, this is happening more often (on non full-screen work,
it's still happening)

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https://bugs.launchpad.net/bugs/1041790

Title:
  [snb] GPU lockup  IPEHR: 0x0b160001 IPEHR: 0x0b140001, workaround
  i915.semaphores=0

Status in X.org xf86-video-intel:
  Confirmed
Status in “linux” package in Ubuntu:
  Confirmed
Status in “sandybridge-meta” package in Ubuntu:
  Confirmed
Status in “xserver-xorg-video-intel” package in Ubuntu:
  Triaged

Bug description:
  X locks up periodically for a 2 to ten seconds at a time and this
  crash log gets generated. It's significantly more than several times a
  day but not quite continuous.

  Temporarily disabiling semaphores seems to eliminate the problem.
  E.g.:

  $ sudo -s
  # echo 0 > /sys/modules/i915/parameters/semaphores

  [Workaround]
  1.  Edit your /etc/default/grub file.
  2.  Change this line:

      GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

  to

      GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.semaphores=0"

  3.  Then run

      sudo update-grub

  4.  And reboot

  If you indeed have this bug, that should stop the lockups from happening.
  If it doesn't, then file a new bug report.

  Side Effects:  Rendering throughput is dropped by 10% with SNA, or as
  much as 3x with UXA. OpenGL performance is likely to be reduced by
  about 30%. More CPU time is spent waiting for the GPU with rc6
  disabled, so increased power consumption.

  [Original Report]

  ProblemType: Crash
  DistroRelease: Ubuntu 12.10
  Package: xserver-xorg-video-intel 2:2.20.3-0ubuntu1
  Uname: Linux 3.6.0-rc3-git-20120826.1015 x86_64
  ApportVersion: 2.5.1-0ubuntu2
  Architecture: amd64
  Chipset: sandybridge-m-gt2
  Date: Sun Aug 26 16:06:32 2012
  DistroCodename: quantal
  DistroVariant: ubuntu
  DuplicateSignature: [sandybridge-m-gt2] GPU lockup  IPEHR: 0x0b160001 IPEHR: 0x0b140001 Ubuntu 12.10
  EcryptfsInUse: Yes
  ExecutablePath: /usr/share/apport/apport-gpu-error-intel.py
  GpuHangFrequency: Continuously
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120724.2)
  InterpreterPath: /usr/bin/python3.2mu
  MachineType: Dell Inc. Dell System XPS L502X
  ProcCmdline: /usr/bin/python3 /usr/share/apport/apport-gpu-error-intel.py
  ProcEnviron:

  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.6.0-rc3-git-20120826.1015 root=UUID=135c8090-427c-460a-909d-eff262cd44b6 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   xserver-xorg             1:7.7+1ubuntu3
   libdrm2                  2.4.38-0ubuntu2
   xserver-xorg-video-intel 2:2.20.3-0ubuntu1
  SourcePackage: xserver-xorg-video-intel
  Title: [sandybridge-m-gt2] GPU lockup  IPEHR: 0x0b160001 IPEHR: 0x0b140001
  UdevDb: Error: [Errno 2] No such file or directory: 'udevadm'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  dmi.bios.date: 05/29/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 0NJT03
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA11:bd05/29/2012:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS L502X
  dmi.sys.vendor: Dell Inc.

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