Mattieu Baerts: >'I didn't have this bug with Precise and Raring (I've not tested with Precise >and the kernel 3.8 but I guess we still have this bug)"
This statement seems to contradict itself. You are saying you did not have the bug in Precise or Raring, but then you haven't tested Precise or Raring. Could you please clarify? -- 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/1170917 Title: Powering down inactive GPU while running X causes NULL pointer dereference Status in The Linux Kernel: Confirmed Status in “linux” package in Ubuntu: Incomplete Bug description: Hello, I'm using Ubuntu Raring 13.04 with the latest version of the kernel available in these repos (3.8.0-19.29). 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 AudioDevicesInUse: USER PID ACCESS COMMAND /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) Lsusb: 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 ProcFB: 0 inteldrmfb 1 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=e7e166e5-3bef-4daf-88a1-5368a679c4a0 ro profile RelatedPackageVersions: linux-restricted-modules-3.8.0-19-generic N/A linux-backports-modules-3.8.0-19-generic N/A linux-firmware 1.106 RfKill: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1170917/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp