Ubuntu
linux package

BUG: unable to handle kernel NULL pointer dereference at 0000000000000020

Bug #1728429 reported by bobrecio on 2017-10-29

This bug affects 2 people

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Confirmed	Medium	Unassigned

Bug Description

Seems to have happened when I was adding an external monitor (Dell 2407)
Using Apple display port -> VGA adapter.
Monitor is not detected in Ubuntu.
External monitor will not work with Ubuntu, but does work with same setup in OSX.

ProblemType: KernelOops
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-16-generic 4.13.0-16.19 [modified: boot/vmlinuz-4.13.0-16-generic]
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
NonfreeKernelModules: wl
Annotation: Your system might become unstable now and might need to be restarted.
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: gdm 988 F.... pulseaudio
recio 1373 F.... pulseaudio
/dev/snd/controlC0: gdm 988 F.... pulseaudio
recio 1373 F.... pulseaudio
Date: Sun Oct 29 12:16:46 2017
DuplicateSignature: BUG: unable to handle kernel NULL pointer dereference at location RIP: nv50_mstm_service+0x18/0xb0 [nouveau] RSP: ffffadf703c4fdc0
Failure: oops
InstallationDate: Installed on 2017-10-21 (8 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
MachineType: Apple Inc. MacBookPro6,1
ProcFB:
0 nouveaufb
1 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic.efi.signed root=UUID=74994dd6-e680-4622-9ef1-c93af42635e3 ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions: kerneloops-daemon N/A
SourcePackage: linux
Title: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/17/17
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP61.88Z.0057.B1C.1706170449
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F22589C8
dmi.board.vendor: Apple Inc.
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F22589C8
dmi.modalias: dmi:bvnAppleInc.:bvrMBP61.88Z.0057.B1C.1706170449:bd06/17/17:svnAppleInc.:pnMacBookPro6,1:pvr1.0:rvnAppleInc.:rnMac-F22589C8:rvr:cvnAppleInc.:ct10:cvrMac-F22589C8:
dmi.product.family: MacBook Pro
dmi.product.name: MacBookPro6,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

Tags:

Revision history for this message

bobrecio (bobrecio) wrote on 2017-10-29:

AlsaInfo.txt Edit (46.5 KiB, text/plain; charset="utf-8")
CRDA.txt Edit (426 bytes, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (80.0 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (2.8 KiB, text/plain; charset="utf-8")
IwConfig.txt Edit (539 bytes, text/plain; charset="utf-8")
JournalErrors.txt Edit (135.0 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (41.3 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (911 bytes, text/plain; charset="utf-8")
OopsText.txt Edit (2.7 KiB, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (3.4 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (869 bytes, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (2.7 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (5.5 KiB, text/plain; charset="utf-8")
RfKill.txt Edit (174 bytes, text/plain; charset="utf-8")
UdevDb.txt Edit (218.4 KiB, text/plain; charset="utf-8")
WifiSyslog.txt Edit (119.0 KiB, text/plain; charset="utf-8")

Revision history for this message

Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote on 2017-10-29: Status changed to Confirmed

This change was made by a bot.

Changed in linux (Ubuntu):
status:	New → Confirmed

Apport retracing service (apport) on 2017-10-29

tags:

removed: need-duplicate-check

Revision history for this message

Joseph Salisbury (jsalisbury) wrote on 2017-10-30:

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.14 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14-rc7

Changed in linux (Ubuntu):
importance:	Undecided → Medium
status:	Confirmed → Incomplete

Revision history for this message

bobrecio (bobrecio) wrote on 2017-11-06:

kernel-fixed-upstream

Thanks!

Changed in linux (Ubuntu):
status:	Incomplete → Confirmed

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BUG: unable to handle kernel NULL pointer dereference at 0000000000000020

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