Created attachment 170801 [details]
Archive of the machine generated debugging information

Please note I'm not technically proficient enough to know what part of the kernel this bug relates to, so I put it in "other". I have filed it here at the request of Ubuntu.

I assume this bug is related to my last session, which locked up, I was not doing anything special: I was using Firefox while talking on Skype. I had to restart using Alt+Sys-Required+REISUB, as all other mouse and keyboard input had frozen.

ProblemType: KernelOops
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-9-generic 3.19.0-9.9
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
NonfreeKernelModules: nvidia
Annotation: Your system might become unstablenow and might need to be restarted.
ApportVersion: 2.16.2-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: lightdm 1323 F.... pulseaudio
                      damon 1996 F.... pulseaudio
Date: Sat Mar 14 18:40:42 2015
Failure: oops
HibernationDevice: RESUME=UUID=b541574a-bb95-47e1-b1ea-32fb30c711c5
InstallationDate: Installed on 2015-02-05 (37 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150205)
MachineType: LENOVO 427637U
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-9-generic root=UUID=eb18ef51-a2d0-4372-8eb9-ae009a05d4f6 ro quiet splash
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: general protection fault: 0000 [#1] SMP
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/26/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8BET62WW (1.42 )
dmi.board.asset.tag: Not Available
dmi.board.name: 427637U
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:bvr8BET62WW(1.42):bd07/26/2013:svnLENOVO:pn427637U:pvrThinkPadW520:rvnLENOVO:rn427637U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 427637U
dmi.product.version: ThinkPad W520
dmi.sys.vendor: LENOVO

The Oops text:

general protection fault: 0000 [#1] SMP 
Modules linked in: dm_crypt binfmt_misc rfcomm bnep intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm arc4 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_codec_conexant snd_hda_codec_generic aesni_intel nvidia(POE) iwldvm snd_hda_intel aes_x86_64 lrw gf128mul glue_helper mac80211 snd_hda_controller ablk_helper cryptd snd_hda_codec snd_hwdep joydev snd_pcm uvcvideo serio_raw thinkpad_acpi videobuf2_vmalloc btusb snd_seq_midi videobuf2_memops nvram hid_logitech_hidpp videobuf2_core snd_seq_midi_event cdc_ether v4l2_common snd_rawmidi usbnet videodev mii media iwlwifi bluetooth snd_seq cfg80211 snd_seq_device snd_timer lpc_ich mei_me snd mei wmi soundcore shpchp mac_hid parport_pc ppdev lp parport autofs4 hid_logitech_dj ses enclosure hid_generic usbhid hid uas usb_storage i915 i2c_algo_bit e1000e drm_kms_helper firewire_ohci psmouse ahci drm firewire_core sdhci_pci libahci ptp sdhci crc_itu_t pps_core video
CPU: 0 PID: 1039 Comm: Xorg Tainted: P           OE  3.19.0-9-generic #9-Ubuntu
Hardware name: LENOVO 427637U/427637U, BIOS 8BET62WW (1.42 ) 07/26/2013
task: ffff880034808000 ti: ffff88042834c000 task.ti: ffff88042834c000
RIP: 0010:[<ffffffffc03251d9>]  [<ffffffffc03251d9>] i915_gem_set_tiling+0x279/0x580 [i915]
RSP: 0018:ffff88042834fd58  EFLAGS: 00010206
RAX: ffff8803f2dd38c0 RBX: ffff8803f2dd3800 RCX: dead000000100090
RDX: dead000000100100 RSI: 0000000000000001 RDI: 00000000000001ff
RBP: ffff88042834fd88 R08: 0000000000465000 R09: 0000000000001e00
R10: ffffffffc03afaa0 R11: ffff88042834fdf0 R12: ffff880425cd0000
R13: ffff88042834fdf0 R14: ffff880426496800 R15: ffff880429034800
FS:  00007fae119a79c0(0000) GS:ffff88043e200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fad7dec4000 CR3: 0000000429bd1000 CR4: 00000000000407f0
Stack:
 ffff88042834fed8 ffff88042834fdf0 0000000000000061 fffffffffffffff2
 ffff880426496800 ffff880429034800 ffff88042834fea8 ffffffffc01abadf
 00007fae13eedad0 0000000000001288 ffff88042834fdd8 ffff88042834fdf0
Call Trace:
 [<ffffffffc01abadf>] drm_ioctl+0x1df/0x680 [drm]
 [<ffffffff813bcf50>] ? timerqueue_add+0x60/0xb0
 [<ffffffff810de6e9>] ? enqueue_hrtimer+0x29/0x90
 [<ffffffff810decbc>] ? __hrtimer_start_range_ns+0x2dc/0x410
 [<ffffffff812077b0>] do_vfs_ioctl+0x2e0/0x4e0
 [<ffffffff816a2e45>] ? __sys_recvmsg+0x65/0x80
 [<ffffffff81207a31>] SyS_ioctl+0x81/0xa0
 [<ffffffff817c7aed>] system_call_fastpath+0x16/0x1b
Code: e8 cd 02 4a c1 44 89 f8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 00 48 8b 51 70 48 39 d0 48 8d 4a 90 0f 84 7f fe ff ff <f6> 42 40 0f 74 e9 8b 0b 83 f9 01 0f 84 ba 02 00 00 8d 51 ff 89 
RIP  [<ffffffffc03251d9>] i915_gem_set_tiling+0x279/0x580 [i915]
 RSP <ffff88042834fd58>
---[ end trace 60c8e20a1989ea56 ]---