"BUG: unable to handle kernel NULL pointer dereference at 00000018" when trying to configure one display centered above another
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
xserver-xorg-video-intel (Ubuntu) |
Fix Released
|
Medium
|
Unassigned |
Bug Description
I was working on diagnosing bug 868354 (Duplicate indicators bar and desktops with overlapped screens) by running the gnome-display-
At one point I (roughly) centered the smaller laptop display above the external monitor, hit apply, and the system locked up. dmesg shows:
[ 1367.073390] BUG: unable to handle kernel NULL pointer dereference at 00000018
[ 1367.073467] IP: [<f8a090f3>] i915_gem_
[ 1367.073530] *pdpt = 0000000033f6b001 *pde = 0000000000000000
[ 1367.073571] Oops: 0000 [#1] SMP
[ 1367.073602] Modules linked in: joydev parport_pc ppdev rfcomm snd_usb_audio usbhid snd_usbmidi_lib hid tpm_infineon bnep arc4 btusb bluetooth snd_hda_codec_hdmi snd_hda_
[ 1367.074156]
[ 1367.074172] Pid: 1208, comm: Xorg Not tainted 3.2.0-5-generic-pae #11-Ubuntu FUJITSU LifeBook T4410/FJNB206
[ 1367.074246] EIP: 0060:[<f8a090f3>] EFLAGS: 00013202 CPU: 1
[ 1367.074295] EIP is at i915_gem_
[ 1367.074338] EAX: f74df24c EBX: f74de000 ECX: f74df1dc EDX: 00000000
[ 1367.074377] ESI: f4794c14 EDI: 05d09000 EBP: f3361e8c ESP: f3361e74
[ 1367.074417] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 1367.074451] Process Xorg (pid: 1208, ti=f3360000 task=f301b2c0 task.ti=f3360000)
[ 1367.074501] Stack:
[ 1367.074517] 00000000 00000000 f3361edc f6d61c80 f4794c00 80106463 f3361f6c f8944f28
[ 1367.074596] 00000001 f895e5ed f8959bb6 f895fc98 000004b8 80106463 00000063 0000e200
[ 1367.074684] 00000001 00000000 00000063 bfc22340 f8a09090 00000010 f8a4c450 ffffffea
[ 1367.074766] Call Trace:
[ 1367.076006] [<f8944f28>] drm_ioctl+
[ 1367.076006] [<f8a09090>] ? i915_gem_
[ 1367.076006] [<c117bbc8>] ? fsnotify+
[ 1367.076006] [<f8944bb0>] ? drm_copy_
[ 1367.076006] [<c1154a89>] do_vfs_
[ 1367.076006] [<c1144180>] ? wait_on_
[ 1367.076006] [<c1154d4f>] sys_ioctl+0x6f/0x80
[ 1367.076006] [<c15ac59f>] sysenter_
[ 1367.076006] Code: 93 4c 12 00 00 8d 83 4c 12 00 00 c7 45 e8 00 00 00 00 c7 45 ec 00 00 00 00 39 d0 8d 4a 98 74 22 31 ff 8d b6 00 00 00 00 8b 51 54
[ 1367.076006] 7a 18 8b 51 68 39 d0 8d 4a 98 75 f0 89 7d e8 c7 45 ec 00 00
[ 1367.076006] EIP: [<f8a090f3>] i915_gem_
[ 1367.076006] CR2: 0000000000000018
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+7ubuntu7
ProcVersionSign
Uname: Linux 3.2.0-5-generic-pae i686
ApportVersion: 1.90-0ubuntu1
Architecture: i386
CompizPlugins: [core,bailer,
Date: Fri Dec 16 17:31:10 2011
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingI
GraphicsCard:
Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
Subsystem: Fujitsu Limited. Device [10cf:1458]
Subsystem: Fujitsu Limited. Device [10cf:1458]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20111121)
MachineType: FUJITSU LifeBook T4410
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/30/2009
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 1.05
dmi.board.name: FJNB206
dmi.board.vendor: FUJITSU
dmi.chassis.type: 10
dmi.chassis.vendor: A40R8CE708EA1001
dmi.modalias: dmi:bvnFUJITSU/
dmi.product.name: LifeBook T4410
dmi.sys.vendor: FUJITSU
version.compiz: compiz 1:0.9.6+
version.libdrm2: libdrm2 2.4.27-1ubuntu1
version.
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summary: |
- X/drm Lockup when trying to configure one display centered above another + "BUG: unable to handle kernel NULL pointer dereference at 00000018" when + trying to configure one display centered above another |
description: | updated |
Changed in xserver-xorg-video-intel (Ubuntu): | |
status: | New → Triaged |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
It also happened to me a couple of times in the last few weeks. I also had random hangs (without the above kernel panic message shown) that could only be solved by hard resetting the machine. I'm on precise and running the latest unity from the unity-team/staging PPA.