BUG: unable to handle kernel NULL pointer dereference
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
nvidia-graphics-drivers-340 (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned | ||
nvidia-graphics-drivers-352 (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
System: Ubuntu 14.04
Graphics Card: Geforce GTX 670
Graphics Driver: nvidia-352.55
Starting with kernel 3.13.0-66, the start of X / default display manager results in a black screen. My observations are:
- When I get this black screen, I cannot CTRL+ALT+F1 into a text console
- Pressing the power button in this state leads to a proper shutdown (which I guess means that it is not a complete kernel panic).
- When using these latest kernel, the graphics behavior during boot-up also has changed. Instead of a graphical animation, the system boots in text mode (I can see the syslog output), and at the moment I should get the display manager, the screen goes black.
My work-around so far has been to boot kernel 3.13.0-65 instead of 3.13.0-66, 3.13.0-67, or 3.13.0-68. So far this has worked reliably. However today, booting kernel 3.13.0-65 has resulted in a black screen as well. Fortunately, I found a new work-around: I can boot kernel 3.13.0-68 in recovery mode, and chose simply "continue" in the recovery console. With this modification of the boot process, X will start.
In the syslog, I can see some suspicious messages, around the time X should start: "BUG: unable to handle kernel NULL pointer dereference at (null)". I have attached a syslog contain some failed starts as well as a successful one.
Another suspicion is that the problem is related having an Oculus Rift DK2 connected. In particular, this requires to use a custom Xorg.conf which runs individual X screens for the main display and the Oculus Rift.
---
ApportVersion: 2.14.1-0ubuntu3.18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=
InstallationDate: Installed on 2014-04-24 (569 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
MachineType: MSI MS-7816
NonfreeKernelMo
Package: linux (not installed)
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=
ProcVersionSign
RelatedPackageV
linux-
linux-
linux-firmware 1.127.18
RfKill:
Tags: trusty
Uname: Linux 3.13.0-68-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 05/17/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.2
dmi.board.
dmi.board.name: Z87-G43 (MS-7816)
dmi.board.vendor: MSI
dmi.board.version: 1.0
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: MS-7816
dmi.product.
dmi.sys.vendor: MSI
affects: | ubuntu → linux (Ubuntu) |
affects: | ubuntu → nvidia-graphics-drivers-352 (Ubuntu) |
summary: |
- X fails to start, starting with kernel version 3.13.0-66 including - 3.13.0-68 + BUG: unable to handle kernel NULL pointer dereference |
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