kernel-packages team mailing list archive

[Ross Grady <ross@xxxxxxxxxxxxx>]

Public bug reported:

Brand new install. I have several of these machines & all have been
happy on 3.16.0-34. Today I did an install & the post-install updates
picked up 3.16.0-36 & now it won't boot successfully -- black screen,
backlight still lit, no response to any keyboard input.

I downloaded & installed the current mainline upstream kernel & it works
fine.

This bit from kern.log appears to be salient:

Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397152] BUG: unable to handle kernel NULL pointer dereference at           (null)
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397156] IP: [<          (null)>]           (null)
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397158] PGD 21f49e067 PUD 21fa04067 PMD 0 
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397161] Oops: 0010 [#1] SMP 
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397163] Modules linked in: x86_pkg_temp_thermal(+) intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel(+) snd_hda_controller serio_raw snd_hda_codec snd_seq_midi snd_seq_midi_event snd_hwdep lpc_ich(+) snd_rawmidi snd_pcm snd_seq wmi snd_seq_device snd_timer shpchp(+) thinkpad_acpi nvram parport_pc mei_me(+) mac_hid ppdev i915(+) mei snd lp parport video drm_kms_helper soundcore drm i2c_algo_bit e1000e psmouse ahci ptp libahci pps_core
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397188] CPU: 0 PID: 337 Comm: systemd-udevd Not tainted 3.16.0-36-generic #48~14.04.1-Ubuntu
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397190] Hardware name: LENOVO 20BTS1KH00/20BTS1KH00, BIOS N14ET26W (1.04 ) 01/23/2015
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397192] task: ffff88021fadd180 ti: ffff88021f6d8000 task.ti: ffff88021f6d8000
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397193] RIP: 0010:[<0000000000000000>]  [<          (null)>]           (null)
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397195] RSP: 0018:ffff88021f6db8a0  EFLAGS: 00010282
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397197] RAX: 0000000000000246 RBX: ffff880036861928 RCX: 0000000000000001
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397198] RDX: 0000000000000001 RSI: 00000000ffffeffe RDI: ffff880036861928
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397199] RBP: ffff88021f6db8c0 R08: 0000000000000246 R09: 000000000000000b
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397201] R10: 00000000e01a3000 R11: ffffffff8119bc1f R12: ffff880036860000
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397202] R13: 00000000ffffeffe R14: 00000000ffffeffe R15: ffff8800b88b3800
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397204] FS:  00007f97b75b1880(0000) GS:ffff88022dc00000(0000) knlGS:0000000000000000
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397205] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397206] CR2: 0000000000000000 CR3: 000000021f69a000 CR4: 00000000003407f0
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397208] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397209] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397210] Stack:
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397211]  ffffffffc03ed88e ffff880036861928 0000000000000005 0000000000000000
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397214]  ffff88021f6db8f8 ffffffffc03d2c5d 00000000ffffefff 00000000ffffeffe
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397217]  ffff880036860000 ffff880036860000 ffff880036860000 ffff88021f6db920
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397219] Call Trace:
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397246]  [<ffffffffc03ed88e>] ? intel_ring_init_seqno+0x3e/0xb0 [i915]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397265]  [<ffffffffc03d2c5d>] i915_gem_init_seqno+0x7d/0xc0 [i915]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397280]  [<ffffffffc03d2cc9>] i915_gem_set_seqno+0x29/0x60 [i915]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397296]  [<ffffffffc03d44bd>] i915_gem_init_hw+0x1cd/0x3a0 [i915]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397309]  [<ffffffffc03d46e5>] i915_gem_init+0x55/0x1d0 [i915]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397332]  [<ffffffffc04385e2>] i915_driver_load+0xb42/0xff0 [i915]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397337]  [<ffffffff81389e88>] ? kobject_uevent_env+0x178/0x690
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397340]  [<ffffffff814b5937>] ? get_device+0x17/0x30
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397342]  [<ffffffff814bb0c5>] ? klist_class_dev_get+0x15/0x20
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397345]  [<ffffffff81752c98>] ? klist_node_init+0x38/0x50
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397347]  [<ffffffff81752d46>] ? klist_add_tail+0x46/0x50
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397349]  [<ffffffff814b70e9>] ? device_add+0x219/0x630
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397362]  [<ffffffffc0306236>] ? drm_sysfs_device_add+0xd6/0x120 [drm]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397372]  [<ffffffffc030284d>] drm_dev_register+0xad/0x100 [drm]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397381]  [<ffffffffc030531f>] drm_get_pci_dev+0x8f/0x200 [drm]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397396]  [<ffffffffc03b04bb>] i915_pci_probe+0x3b/0x60 [i915]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397399]  [<ffffffff813cf4c5>] local_pci_probe+0x45/0xa0
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397401]  [<ffffffff813d0685>] ? pci_match_device+0xe5/0x110
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397404]  [<ffffffff813d07c9>] pci_device_probe+0xd9/0x130
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397408]  [<ffffffff814ba26d>] driver_probe_device+0x12d/0x3e0
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397411]  [<ffffffff814ba5f3>] __driver_attach+0x93/0xa0
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397414]  [<ffffffff814ba560>] ? __device_attach+0x40/0x40
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397416]  [<ffffffff814b8213>] bus_for_each_dev+0x63/0xa0
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397419]  [<ffffffff814b9c6e>] driver_attach+0x1e/0x20
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397422]  [<ffffffff814b9880>] bus_add_driver+0x180/0x250
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397425]  [<ffffffff814badd4>] driver_register+0x64/0xf0
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397428]  [<ffffffff813cee4c>] __pci_register_driver+0x4c/0x50
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397436]  [<ffffffffc030559a>] drm_pci_init+0x10a/0x140 [drm]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397439]  [<ffffffffc048f000>] ? 0xffffffffc048efff
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397453]  [<ffffffffc048f089>] i915_init+0x89/0x90 [i915]
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397457]  [<ffffffff81002144>] do_one_initcall+0xd4/0x210
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397460]  [<ffffffff811b645d>] ? kfree+0xfd/0x140
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397463]  [<ffffffff8119d3c2>] ? __vunmap+0xb2/0x100
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397467]  [<ffffffff810edb11>] load_module+0x13c1/0x1b80
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397470]  [<ffffffff810e96c0>] ? store_uevent+0x40/0x40
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397474]  [<ffffffff810ee446>] SyS_finit_module+0x86/0xb0
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397478]  [<ffffffff8176d18d>] system_call_fastpath+0x1a/0x1f
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397479] Code:  Bad RIP value.
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397482] RIP  [<          (null)>]           (null)
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397484]  RSP <ffff88021f6db8a0>
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397485] CR2: 0000000000000000
Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397487] ---[ end trace 57457390f4290305 ]---


That only occurs with 3.16.0-36

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-34-generic 3.16.0-34.47~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-34.47~14.04.1-generic 3.16.7-ckt8
Uname: Linux 3.16.0-34-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Apr 29 14:47:47 2015
InstallationDate: Installed on 2015-04-29 (0 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-lts-utopic (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-lts-utopic in Ubuntu.
https://bugs.launchpad.net/bugs/1450156

Title:
  kernel 3.16.0-36 won't boot on Lenovo Thinkpad X1 Carbon 3rd Gen

Status in linux-lts-utopic package in Ubuntu:
  New

Bug description:
  Brand new install. I have several of these machines & all have been
  happy on 3.16.0-34. Today I did an install & the post-install updates
  picked up 3.16.0-36 & now it won't boot successfully -- black screen,
  backlight still lit, no response to any keyboard input.

  I downloaded & installed the current mainline upstream kernel & it
  works fine.

  This bit from kern.log appears to be salient:

  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397152] BUG: unable to handle kernel NULL pointer dereference at           (null)
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397156] IP: [<          (null)>]           (null)
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397158] PGD 21f49e067 PUD 21fa04067 PMD 0 
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397161] Oops: 0010 [#1] SMP 
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397163] Modules linked in: x86_pkg_temp_thermal(+) intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_intel(+) snd_hda_controller serio_raw snd_hda_codec snd_seq_midi snd_seq_midi_event snd_hwdep lpc_ich(+) snd_rawmidi snd_pcm snd_seq wmi snd_seq_device snd_timer shpchp(+) thinkpad_acpi nvram parport_pc mei_me(+) mac_hid ppdev i915(+) mei snd lp parport video drm_kms_helper soundcore drm i2c_algo_bit e1000e psmouse ahci ptp libahci pps_core
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397188] CPU: 0 PID: 337 Comm: systemd-udevd Not tainted 3.16.0-36-generic #48~14.04.1-Ubuntu
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397190] Hardware name: LENOVO 20BTS1KH00/20BTS1KH00, BIOS N14ET26W (1.04 ) 01/23/2015
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397192] task: ffff88021fadd180 ti: ffff88021f6d8000 task.ti: ffff88021f6d8000
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397193] RIP: 0010:[<0000000000000000>]  [<          (null)>]           (null)
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397195] RSP: 0018:ffff88021f6db8a0  EFLAGS: 00010282
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397197] RAX: 0000000000000246 RBX: ffff880036861928 RCX: 0000000000000001
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397198] RDX: 0000000000000001 RSI: 00000000ffffeffe RDI: ffff880036861928
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397199] RBP: ffff88021f6db8c0 R08: 0000000000000246 R09: 000000000000000b
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397201] R10: 00000000e01a3000 R11: ffffffff8119bc1f R12: ffff880036860000
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397202] R13: 00000000ffffeffe R14: 00000000ffffeffe R15: ffff8800b88b3800
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397204] FS:  00007f97b75b1880(0000) GS:ffff88022dc00000(0000) knlGS:0000000000000000
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397205] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397206] CR2: 0000000000000000 CR3: 000000021f69a000 CR4: 00000000003407f0
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397208] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397209] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397210] Stack:
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397211]  ffffffffc03ed88e ffff880036861928 0000000000000005 0000000000000000
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397214]  ffff88021f6db8f8 ffffffffc03d2c5d 00000000ffffefff 00000000ffffeffe
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397217]  ffff880036860000 ffff880036860000 ffff880036860000 ffff88021f6db920
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397219] Call Trace:
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397246]  [<ffffffffc03ed88e>] ? intel_ring_init_seqno+0x3e/0xb0 [i915]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397265]  [<ffffffffc03d2c5d>] i915_gem_init_seqno+0x7d/0xc0 [i915]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397280]  [<ffffffffc03d2cc9>] i915_gem_set_seqno+0x29/0x60 [i915]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397296]  [<ffffffffc03d44bd>] i915_gem_init_hw+0x1cd/0x3a0 [i915]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397309]  [<ffffffffc03d46e5>] i915_gem_init+0x55/0x1d0 [i915]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397332]  [<ffffffffc04385e2>] i915_driver_load+0xb42/0xff0 [i915]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397337]  [<ffffffff81389e88>] ? kobject_uevent_env+0x178/0x690
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397340]  [<ffffffff814b5937>] ? get_device+0x17/0x30
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397342]  [<ffffffff814bb0c5>] ? klist_class_dev_get+0x15/0x20
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397345]  [<ffffffff81752c98>] ? klist_node_init+0x38/0x50
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397347]  [<ffffffff81752d46>] ? klist_add_tail+0x46/0x50
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397349]  [<ffffffff814b70e9>] ? device_add+0x219/0x630
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397362]  [<ffffffffc0306236>] ? drm_sysfs_device_add+0xd6/0x120 [drm]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397372]  [<ffffffffc030284d>] drm_dev_register+0xad/0x100 [drm]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397381]  [<ffffffffc030531f>] drm_get_pci_dev+0x8f/0x200 [drm]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397396]  [<ffffffffc03b04bb>] i915_pci_probe+0x3b/0x60 [i915]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397399]  [<ffffffff813cf4c5>] local_pci_probe+0x45/0xa0
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397401]  [<ffffffff813d0685>] ? pci_match_device+0xe5/0x110
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397404]  [<ffffffff813d07c9>] pci_device_probe+0xd9/0x130
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397408]  [<ffffffff814ba26d>] driver_probe_device+0x12d/0x3e0
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397411]  [<ffffffff814ba5f3>] __driver_attach+0x93/0xa0
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397414]  [<ffffffff814ba560>] ? __device_attach+0x40/0x40
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397416]  [<ffffffff814b8213>] bus_for_each_dev+0x63/0xa0
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397419]  [<ffffffff814b9c6e>] driver_attach+0x1e/0x20
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397422]  [<ffffffff814b9880>] bus_add_driver+0x180/0x250
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397425]  [<ffffffff814badd4>] driver_register+0x64/0xf0
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397428]  [<ffffffff813cee4c>] __pci_register_driver+0x4c/0x50
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397436]  [<ffffffffc030559a>] drm_pci_init+0x10a/0x140 [drm]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397439]  [<ffffffffc048f000>] ? 0xffffffffc048efff
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397453]  [<ffffffffc048f089>] i915_init+0x89/0x90 [i915]
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397457]  [<ffffffff81002144>] do_one_initcall+0xd4/0x210
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397460]  [<ffffffff811b645d>] ? kfree+0xfd/0x140
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397463]  [<ffffffff8119d3c2>] ? __vunmap+0xb2/0x100
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397467]  [<ffffffff810edb11>] load_module+0x13c1/0x1b80
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397470]  [<ffffffff810e96c0>] ? store_uevent+0x40/0x40
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397474]  [<ffffffff810ee446>] SyS_finit_module+0x86/0xb0
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397478]  [<ffffffff8176d18d>] system_call_fastpath+0x1a/0x1f
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397479] Code:  Bad RIP value.
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397482] RIP  [<          (null)>]           (null)
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397484]  RSP <ffff88021f6db8a0>
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397485] CR2: 0000000000000000
  Apr 29 14:44:39 eb-thinkpad-4444 kernel: [    1.397487] ---[ end trace 57457390f4290305 ]---

  
  That only occurs with 3.16.0-36

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-34-generic 3.16.0-34.47~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-34.47~14.04.1-generic 3.16.7-ckt8
  Uname: Linux 3.16.0-34-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Apr 29 14:47:47 2015
  InstallationDate: Installed on 2015-04-29 (0 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)

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