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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Did this issue start happening after an update/upgrade? Was there a
kernel version where you were not having this particular problem? This
will help determine if the problem you are seeing is the result of the
introduction of a regression, and when this regression was introduced.
If this is a regression, we can perform a kernel bisect to identify the
commit that introduced the problem.

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https://bugs.launchpad.net/bugs/1319141

Title:
  [Lenovo ThinkPad T440s] Kernel oops before suspend

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  May 13 18:22:10 faire kernel: [35947.754796] PM: Syncing filesystems ... done.
  May 13 18:22:10 faire kernel: [35947.782070] PM: Preparing system for mem sleep
  May 13 19:17:45 faire kernel: [35947.782396] mmc0: card b368 removed
  May 13 19:17:45 faire kernel: [35947.784816] Freezing user space processes ... (elapsed 0.002 seconds) done.
  May 13 19:17:45 faire kernel: [35947.787286] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
  May 13 19:17:45 faire kernel: [35947.788760] PM: Entering mem sleep
  May 13 19:17:45 faire kernel: [35947.788841] Suspending console(s) (use no_console_suspend to debug)
  May 13 19:17:45 faire kernel: [35947.935975] sd 1:0:0:0: [sdb] Synchronizing SCSI cache
  May 13 19:17:45 faire kernel: [35947.936044] sd 1:0:0:0: [sdb] Stopping disk
  May 13 19:17:45 faire kernel: [35947.936099] sd 0:0:0:0: [sda] Synchronizing SCSI cache
  May 13 19:17:45 faire kernel: [35947.938056] sd 0:0:0:0: [sda] Stopping disk
  May 13 19:17:45 faire kernel: [35948.162233] ------------[ cut here ]------------
  May 13 19:17:45 faire kernel: [35948.162268] WARNING: CPU: 0 PID: 32245 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_uncore.c:125 gen6_gt_check_fifodbg.isra.9+0x38/0x50 [i915]()
  May 13 19:17:45 faire kernel: [35948.162268] MMIO read or write has been dropped ffffffff
  May 13 19:17:45 faire kernel: [35948.162292] Modules linked in: ums_cypress usb_storage veth ccm hid_generic usbhid hid xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables deflate ctr twofish_generic twofish_avx_x86_64 twofish_x86_64_3way twofish_x86_64 twofish_common camellia_generic camellia_aesni_avx2 camellia_aesni_avx_x86_64 camellia_x86_64 serpent_avx2 serpent_avx_x86_64 serpent_sse2_x86_64 xts serpent_generic blowfish_generic blowfish_x86_64 blowfish_common cast5_avx_x86_64 cast5_generic cast_common des_generic cmac xcbc rmd160 crypto_null af_key xfrm_algo arc4 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp iwlmvm kvm_intel mac80211 kvm joydev snd_hda_codec_hdmi serio_raw snd_hda_codec_realtek rtsx_pci_ms memstick iwlwifi btusb bluetooth thinkpad_acpi snd_hda_intel nvram snd_hda_codec cfg80211 snd_seq_midi snd_seq_midi_event snd_hwdep snd_pcm snd_rawmidi lpc_ich snd_seq mei_me snd_page_alloc snd_seq_device mei snd_timer snd soundcore binfmt_misc mac_hid intel_smartconnect cuse parport_pc ppdev lp parport nls_iso8859_1 dm_crypt mmc_block rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci e1000e libahci rtsx_pci i2c_algo_bit ptp drm_kms_helper pps_core drm wmi video
  May 13 19:17:45 faire kernel: [35948.162318] CPU: 0 PID: 32245 Comm: kworker/u16:0 Not tainted 3.13.0-24-generic #47-Ubuntu
  May 13 19:17:45 faire kernel: [35948.162319] Hardware name: LENOVO 20AQCTO1WW/20AQCTO1WW, BIOS GJET71WW (2.21 ) 02/10/2014
  May 13 19:17:45 faire kernel: [35948.162330] Workqueue: i915 gen6_force_wake_work [i915]
  May 13 19:17:45 faire kernel: [35948.162332]  0000000000000009 ffff880236459d38 ffffffff81715ac4 ffff880236459d80
  May 13 19:17:45 faire kernel: [35948.162333]  ffff880236459d70 ffffffff810676bd ffff880306fb0020 ffff880306fb0028
  May 13 19:17:45 faire kernel: [35948.162335]  0000000000000246 0000000000000000 0000000000000200 ffff880236459dd0
  May 13 19:17:45 faire kernel: [35948.162335] Call Trace:
  May 13 19:17:45 faire kernel: [35948.162339]  [<ffffffff81715ac4>] dump_stack+0x45/0x56
  May 13 19:17:45 faire kernel: [35948.162341]  [<ffffffff810676bd>] warn_slowpath_common+0x7d/0xa0
  May 13 19:17:45 faire kernel: [35948.162342]  [<ffffffff8106772c>] warn_slowpath_fmt+0x4c/0x50
  May 13 19:17:45 faire kernel: [35948.162353]  [<ffffffffa018ede8>] gen6_gt_check_fifodbg.isra.9+0x38/0x50 [i915]
  May 13 19:17:45 faire kernel: [35948.162363]  [<ffffffffa018ee8b>] __gen6_gt_force_wake_mt_put+0x2b/0x30 [i915]
  May 13 19:17:45 faire kernel: [35948.162371]  [<ffffffffa018ebb7>] gen6_force_wake_work+0x37/0x50 [i915]
  May 13 19:17:45 faire kernel: [35948.162374]  [<ffffffff810838a2>] process_one_work+0x182/0x450
  May 13 19:17:45 faire kernel: [35948.162376]  [<ffffffff81084641>] worker_thread+0x121/0x410
  May 13 19:17:45 faire kernel: [35948.162377]  [<ffffffff81084520>] ? rescuer_thread+0x3e0/0x3e0
  May 13 19:17:45 faire kernel: [35948.162379]  [<ffffffff8108b312>] kthread+0xd2/0xf0
  May 13 19:17:45 faire kernel: [35948.162381]  [<ffffffff8108b240>] ? kthread_create_on_node+0x1d0/0x1d0
  May 13 19:17:45 faire kernel: [35948.162383]  [<ffffffff817263fc>] ret_from_fork+0x7c/0xb0
  May 13 19:17:45 faire kernel: [35948.162384]  [<ffffffff8108b240>] ? kthread_create_on_node+0x1d0/0x1d0
  May 13 19:17:45 faire kernel: [35948.162384] ---[ end trace 07caaff3206587f4 ]---
  May 13 19:17:45 faire kernel: [35948.174438] PM: suspend of devices complete after 385.612 msecs

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.13.0-24-generic 3.13.0-24.47
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.2-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  james      4290 F.... pulseaudio
   /dev/snd/controlC1:  james      4290 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue May 13 19:20:14 2014
  HibernationDevice: RESUME=UUID=db600bbe-faca-41f4-9338-c3e8e227599a
  InstallationDate: Installed on 2014-04-11 (31 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140409)
  MachineType: LENOVO 20AQCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-24-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.129
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-05-08 (5 days ago)
  dmi.bios.date: 02/10/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET71WW (2.21 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AQCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98405 STD
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGJET71WW(2.21):bd02/10/2014:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvr0B98405STD:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AQCTO1WW
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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