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 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1763301 Title: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 Status in linux package in Ubuntu: Incomplete Bug description: Afraid not much to add, this occurred after rebooting the laptop. ProblemType: KernelOops DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-13-generic 4.15.0-13.14 ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10 Uname: Linux 4.15.0-13-generic x86_64 Annotation: Your system might become unstable now and might need to be restarted. ApportVersion: 2.20.9-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: gdm 1156 F.... pulseaudio calum 2981 F.... pulseaudio Date: Wed Apr 11 22:14:58 2018 DuplicateSignature: BUG: unable to handle kernel NULL pointer dereference at location RIP: timecounter_read+0x10/0x60 RSP: ffffb2b88116be08 Failure: oops InstallationDate: Installed on 2017-10-20 (173 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018) MachineType: LENOVO 20JDCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic.efi.signed root=UUID=4f03289b-2cac-4bfb-bc59-47e041629a44 ro quiet splash resume=UUID=4f03289b-2cac-4bfb-bc59-47e041629a44 resume_offset=757760 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: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 UpgradeStatus: Upgraded to bionic on 2018-04-11 (0 days ago) dmi.bios.date: 12/14/2017 dmi.bios.vendor: LENOVO dmi.bios.version: N1NET34W (1.21 ) dmi.board.asset.tag: Not Available dmi.board.name: 20JDCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 31 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1NET34W(1.21):bd12/14/2017:svnLENOVO:pn20JDCTO1WW:pvrThinkPadX1Yoga2nd:rvnLENOVO:rn20JDCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct31:cvrNone: dmi.product.family: ThinkPad X1 Yoga 2nd dmi.product.name: 20JDCTO1WW dmi.product.version: ThinkPad X1 Yoga 2nd dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763301/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
