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[Bug 1170917] Re: IP: [<ffffffffa01b6c05>] r600_pcie_gart_tlb_flush+0xf5/0x110 [radeon]; RIP: 0010:[<ffffffffa01b6c05>] [<ffffffffa01b6c05>] r600_pcie_gart_tlb_flush+0xf5/0x110 [radeon]


@Christopher: I still have this crash with the upstream kernel version 3.12.0-031200.
It seems that it still crash in 'r600_pcie_gart_tlb_flush'.

Note that I no longer have this crash if I remove this line from
/etc/init/lightdm.conf (please have a look to the comment #7 for more
details about that):

    echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

But then, my ATI/AMD GPU is still enabled and consume a lot of

** Tags removed: needs-upstream-testing
** Tags added: kernel-bug-exists-upstream-v3.12

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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  IP: [<ffffffffa01b6c05>] r600_pcie_gart_tlb_flush+0xf5/0x110 [radeon];
  RIP: 0010:[<ffffffffa01b6c05>]  [<ffffffffa01b6c05>]
  r600_pcie_gart_tlb_flush+0xf5/0x110 [radeon]

Status in The Linux Kernel:
Status in “linux” package in Ubuntu:

Bug description:
  With using Kernel 3.8 and newer sometimes I have a kernel OOPS at startup and it seems it's because I switch off my ATI card.
  I added this line in my /etc/rc.local file:
     echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

  I don't have this bug each time but I guess it depends if this
  previous command is launched before or after that X11's launch. I'm
  using this card: Mobility Radeon HD 4650.

  It seems that this bug has already reported to there: https://bugzilla.kernel.org/show_bug.cgi?id=49531 and https://bugs.freedesktop.org/show_bug.cgi?id=61529
  But I guess it can be interesting to track this bug on Launchpad.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-19-generic 3.8.0-19.29
  ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
  Uname: Linux 3.8.0-19-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
   /dev/snd/controlC0:  mbaerts    2074 F.... pulseaudio
   /dev/snd/pcmC0D0p:   mbaerts    2074 F...m pulseaudio
  Date: Sat Apr 20 11:41:12 2013
  HibernationDevice: RESUME=UUID=06229bec-927d-4cfa-9a82-f9949d5151ca
  InstallationDate: Installed on 2011-08-10 (618 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110803.1)
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 003: ID 064e:a130 Suyin Corp.
  MachineType: Medion P662X
  MarkForUpload: True
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=e7e166e5-3bef-4daf-88a1-5368a679c4a0 ro profile
   linux-restricted-modules-3.8.0-19-generic N/A
   linux-backports-modules-3.8.0-19-generic  N/A
   linux-firmware                            1.106
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/13/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 202
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: H36QM
  dmi.board.vendor: To be filled by O.E.M.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 10
  dmi.chassis.vendor: PEGATRON CORPORATION
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr202:bd04/13/2010:svnMedion:pnP662X:pvr1.0:rvnTobefilledbyO.E.M.:rnH36QM:rvr1.0:cvnPEGATRONCORPORATION:ct10:cvr1.0:
  dmi.product.name: P662X
  dmi.product.version: 1.0
  dmi.sys.vendor: Medion

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