Do you have a proper kernel log with this bug? Or perhaps if you can setup crashdump on your laptop and trigger this it may make it easier to get information about the crash. Then identifying the delta may be easier.
-- 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/1439849 Title: BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 Status in linux package in Ubuntu: Confirmed Bug description: I hit this bug as I'm logging in to an encrypted home account after booting with systemd. It results in a hung system immediately after the password authentication stage as pam_ecryptfs call mount.ecryptfs to mount the user's encrypted home directory. I can't reproduce it in a VM. Booting with upstart works fine. I was previously booting with systemd without any problem so this may be due to a change in the 219-6ubuntu1 systemd update. ProblemType: KernelOops DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-11-generic 3.19.0-11.11 ProcVersionSignature: Ubuntu 3.19.0-11.11-generic 3.19.3 Uname: Linux 3.19.0-11-generic x86_64 Annotation: Your system might become unstablenow and might need to be restarted. ApportVersion: 2.17-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: tyhicks 3786 F.... pulseaudio Date: Thu Apr 2 14:19:21 2015 DuplicateSignature: BUG: unable to handle kernel NULL pointer dereference at location RIP: 0010:location location propagate_one+0xc7/0x1e0 Failure: oops InstallationDate: Installed on 2011-08-23 (1318 days ago) InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) MachineType: LENOVO 4286CTO ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-11-generic root=UUID=bd144b12-0d78-4d1e-b69c-8d83ee663c8f ro quiet splash kaslr crashkernel=384M-:128M crashkernel=384M-:128M vt.handoff=7 init=/sbin/upstart PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-3ubuntu8 SourcePackage: linux Title: BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 UpgradeStatus: Upgraded to vivid on 2015-02-27 (34 days ago) dmi.bios.date: 04/11/2013 dmi.bios.vendor: LENOVO dmi.bios.version: 8DET68WW (1.38 ) dmi.board.asset.tag: Not Available dmi.board.name: 4286CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8DET68WW(1.38):bd04/11/2013:svnLENOVO:pn4286CTO:pvrThinkPadX220:rvnLENOVO:rn4286CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4286CTO dmi.product.version: ThinkPad X220 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1439849/+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
