watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [Xorg:5557]

[emk2203]

after startup

ProblemType: KernelOops
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-12-generic 4.15.0-12.13
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_uvm nvidia_drm nvidia_modeset nvidia
Annotation: Your system might become unstable now and might need to be restarted.
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: gdm 5288 F.... pulseaudio
                      erik 7152 F.... pulseaudio
 /dev/snd/controlC0: gdm 5288 F.... pulseaudio
                      erik 7152 F.... pulseaudio
Date: Wed Mar 14 20:10:57 2018
Failure: oops
HibernationDevice: RESUME=UUID=fb731a76-d649-4283-9a48-91fda418f5d4
InstallationDate: Installed on 2018-02-25 (18 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180225)
IwConfig:
 enp3s0 no wireless extensions.

 lo no wireless extensions.

 enp8s0 no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-12-generic root=UUID=269d199c-0dea-47bc-89fb-5388d4361c0e ro quiet splash vt.handoff=1
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
RfKill:

SourcePackage: linux
Title: watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [Xorg:5557]
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/11/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: U1n
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z68X-UD3H-B3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrU1n:bd07/11/2016:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ68X-UD3H-B3:rvrTobefilledbyO.E.M.:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

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 v4.16 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/v4.16-rc4

[emk2203 (emk2203)]

Issue started after one of the updates. Prior kernel version difficult to pinpoint, since the bug seems to happen only after cold boots, not after a warm boot.

WORKAROUND: Start computer, restart after boot process completed.

4.16rc4 didn't show the symptoms, but was unusable since zfs is missing from it.