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[brokeasshachi <greasemunkeyparts@xxxxxxxxxxx>]

*** This bug is a duplicate of bug 1449401 ***
    https://bugs.launchpad.net/bugs/1449401

FYI, on trusty:

~ % apt-cache show linux-image-3.16.0-37-generic 
Package: linux-image-3.16.0-37-generic
Priority: optional
Section: kernel
Installed-Size: 43736
Maintainer: Ubuntu Kernel Team <kernel-team@xxxxxxxxxxxxxxxx>
Architecture: amd64
Source: linux-lts-utopic
Version: 3.16.0-37.49~14.04.1
Provides: fuse-module, ivtv-modules, kvm-api-4, linux-image, linux-image-3.0, redhat-cluster-modules
Depends: initramfs-tools (>= 0.36ubuntu6), module-init-tools (>= 3.3-pre11-4ubuntu3)
Pre-Depends: dpkg (>= 1.10.24)
Recommends: grub-pc | grub-efi-amd64 | grub-efi-ia32 | grub | lilo (>= 19.1)
Suggests: fdutils, linux-lts-utopic-tools, linux-headers-3.16.0-37-generic
Conflicts: hotplug (<< 0.0.20040105-1)
Filename: pool/main/l/linux-lts-utopic/linux-image-3.16.0-37-generic_3.16.0-37.49~14.04.1_amd64.deb
Size: 16113392
MD5sum: db115c196b691e55f24c94c5eea5d47c
SHA1: a624ce19640594ade09801fc3eed32462b595068
SHA256: 3d769ec0d305b083705fc85d7461dc4e40444a039d46c7c04410e1909503e2cb
Description-en: Linux kernel image for version 3.16.0 on 64 bit x86 SMP
 This package contains the Linux kernel image for version 3.16.0 on
 64 bit x86 SMP.
 .
 Also includes the corresponding System.map file, the modules built by the
 packager, and scripts that try to ensure that the system is not left in an
 unbootable state after an update.
 .
 Supports Generic processors.
 .
 Geared toward desktop and server systems.
 .
 You likely do not want to install this package directly. Instead, install
 the linux-generic meta-package, which will ensure that upgrades work
 correctly, and that supporting packages are also installed.
Description-md5: 1e02f1d5baa368a8ac5875babbb3f358
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 9m

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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 package in Ubuntu:
  In Progress
Status in linux-lts-utopic package in Ubuntu:
  Confirmed
Status in linux source package in Utopic:
  In Progress
Status in linux-lts-utopic source package in Utopic:
  Confirmed

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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