watchdog: BUG: soft lockup - CPU#7 stuck for 23s! [kworker/7:1:75]

[S S]

I had just done a power and BIOS reset to fix a battery problem -- disconnected the battery and the CMOS battery, and held down buttons to reset the power configuration and BIOS. (Not sure I would recommend this, but it worked!)

Booting back into Ubuntu, I had this problem. Things seemed normal, but WiFi wouldn't connect, and any interaction with the system (trying to change wifi networks, turn off wifi, power down, restart) just resulted in no response. I did a Alt-SysRq REISUB and booted back in, saw this error report, and here we are.

ProblemType: KernelOops
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-15-generic 4.15.0-15.16 [modified: boot/vmlinuz-4.15.0-15-generic]
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
Annotation: Your system might become unstable now and might need to be restarted.
ApportVersion: 2.20.9-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: steve 1266 F.... pulseaudio
Date: Sun Apr 22 14:25:35 2018
Failure: oops
InstallationDate: Installed on 2018-04-21 (1 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180420)
MachineType: Acer Spin SP515-51GN
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-15-generic.efi.signed root=UUID=9e351fb3-4ce7-444e-bfe9-07b1c7cd1519 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
SourcePackage: linux
Title: watchdog: BUG: soft lockup - CPU#7 stuck for 23s! [kworker/7:1:75]
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/26/2017
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.03
dmi.board.name: Buzz_KL
dmi.board.vendor: KBL
dmi.board.version: V1.03
dmi.chassis.type: 31
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.03
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.03:bd10/26/2017:svnAcer:pnSpinSP515-51GN:pvrV1.03:rvnKBL:rnBuzz_KL:rvrV1.03:cvnAcer:ct31:cvrV1.03:
dmi.product.family: Spin 5
dmi.product.name: Spin SP515-51GN
dmi.product.version: V1.03
dmi.sys.vendor: Acer

[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/v4.17-rc2

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]