kernel-packages team mailing list archive

[helios <Martin@xxxxxxxxxxxx>]

(In reply to Chris Wilson from comment #226)
> (In reply to Martin Steigerwald from comment #225)
> > Chris, you referred me to this bug as I reported
> > 
> > Bug 90835 - [4.1-rc6] gpu hang: ecode 6:-1:0x00000000, Kicking stuck
> > semaphore on render ring
> > 
> > I skimmed through it and it appears that there are some patches to test? But
> > I am not sure which ones these are. Can you or someone else enlighten me?
> 
> There's likely a modest improvement in 4.2.

Nice.

> > Also I note that I still use
> > 
> >         Option          "AccelMethod"   "uxa"
> > 
> > and I have
> > 
> > martin@merkaba:~> cat /etc/modprobe.d/i915-kms.conf 
> > options i915 modeset=1 i915_enable_rc6=7
> 
> Fortuitously that dangerous option doesn't do anything for your kernel.

Well I found out why, I compiled i915 into the kernel it seems, at least
I don´t have an i915 module in lsmod. But also i915.i915_enable_rc6=7 on
kernel command line does not seem to have any effect. I removed the
option.

> > ffffffff813a4b0e
> > thus maximum energy saving. But according to powertop it never enters the
> > highest sleep state anyway.
> > 
> > I will remove the AccelMethod setting now and see whether it helps. If not,
> > I downgrade to 4.1-rc4 for now, as issues have been at least much less
> > frequent with it.
> 
> Purely circumstantial.

Since using SNA I didn´t see a GPU hang so far. Too early to say for
sure, but it seems something in UXA may have triggered it more easily.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
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:
  In Progress
Status in linux package in Ubuntu:
  Incomplete
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. If you indeed have this bug, that should
  stop the lockups from happening. Irrespective, please file a new bug
  report so your hardware may be tracked.

  WORKAROUND: Edit your /etc/default/grub from:
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

  to:
  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.semaphores=0"

  run the following and reboot:
  sudo update-grub

  The side effects of this is 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.

  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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1041790/+subscriptions