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[Launchpad Bug Tracker <1535521@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1535521

Title:
  kernel stack trace

Status in linux package in Ubuntu:
  Expired

Bug description:
  When I booted into 3.19.0.43 from Ubuntu 14.04.3 .   The kernel
  stopped during boot.  I checked dmesg. There was a stack trace.  The
  motherboard I used is a ASRock H170M Pro4  Bios p1.8.  The following
  is the stack trace.

   [    8.484935] [drm] Replacing VGA console driver
  [    8.489503] Console: switching to colour dummy device 80x25
  [    8.492850] usbcore: registered new interface driver btusb
  [    8.503446] audit: type=1400 audit(1453175142.377:2): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=600 comm="apparmor_parser"
  [    8.503654] audit: type=1400 audit(1453175142.377:3): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/cupsd" pid=600 comm="apparmor_parser"
  [    8.504798] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
  [    8.504800] [drm] Driver supports precise vblank timestamp query.
  [    8.506398] BUG: unable to handle kernel NULL pointer dereference at 0000000000000060
  [    8.506403] IP: [<ffffffffc0702e45>] ddi_get_encoder_port+0x5/0x70 [i915_bpo]
  [    8.506428] PGD 274ff3067 PUD 274494067 PMD 0
  [    8.506430] Oops: 0000 [#1] SMP
  [    8.506432] Modules linked in: snd_seq(+) snd_seq_device snd_timer snd btusb soundcore i915_bpo(+) intel_ips drm_kms_helper drm i2c_algo_bit shpchp 8250_fintek wmi video i2c_hid mac_hid acpi_pad parport_pc ppdev coretemp hwmon_vid rfcomm lp parport bnep bluetooth nfsd auth_rpcgss nfs_acl nfs binfmt_misc lockd grace sunrpc fscache hid_generic hid_logitech_dj usbhid hid raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor megaraid_sas psmouse e1000e ptp ahci pps_core libahci raid6_pq raid1 raid0 multipath linear dm_mirror dm_region_hash dm_log
  [    8.506457] CPU: 0 PID: 634 Comm: systemd-udevd Not tainted 3.19.0-43-generic #49~14.04.1-Ubuntu
  [    8.506459] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./H170M Pro4, BIOS P1.80 11/10/2015
  [    8.506461] task: ffff880275f6f5c0 ti: ffff8802751c8000 task.ti: ffff8802751c8000
  [    8.506463] RIP: 0010:[<ffffffffc0702e45>]  [<ffffffffc0702e45>] ddi_get_encoder_port+0x5/0x70 [i915_bpo]
  [    8.506482] RSP: 0018:ffff8802751cb750  EFLAGS: 00010286
  [    8.506483] RAX: 0000000000000000 RBX: ffff880071800000 RCX: ffff8802755c1800
  [    8.506484] RDX: ffff8802751cb7a4 RSI: ffff8802751cb7b0 RDI: fffffffffffffff8
  [    8.506485] RBP: ffff8802751cb7e8 R08: ffff8802751c8000 R09: 0000000000000246
  [    8.506487] R10: 0000000000000004 R11: 0000000000000005 R12: ffff8802755c1800
  [    8.506488] R13: ffffffffc0760770 R14: 00000000fffee35b R15: 0000000000000001
  [    8.506489] FS:  00007f4aa208d880(0000) GS:ffff880280c00000(0000) knlGS:0000000000000000
  [    8.506491] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [    8.506492] CR2: 0000000000000060 CR3: 0000000274ff2000 CR4: 00000000003407f0
  [    8.506493] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  [    8.506494] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  [    8.506495] Stack:
  [    8.506496]  ffffffffc0706fe1 ffff880280d8e4c0 0000000000000000 000000000000027a
  [    8.506499]  ffffffff817b677c 0000000000000246 ffff8802755c1b60 ffff8802755c1800
  [    8.506501]  fffffffffffffff8 0000000000000000 ffff880071800000 0000000000000000
  [    8.506503] Call Trace:
  [    8.506522]  [<ffffffffc0706fe1>] ? intel_prepare_ddi+0x71/0x390 [i915_bpo]
  [    8.506527]  [<ffffffff817b677c>] ? schedule_hrtimeout_range_clock+0xac/0x160
  [    8.506541]  [<ffffffffc0687071>] skl_set_power_well+0x421/0xae0 [i915_bpo]
  [    8.506555]  [<ffffffffc0687763>] skl_power_well_enable+0x13/0x20 [i915_bpo]
  [    8.506568]  [<ffffffffc0687a26>] intel_display_power_get+0xa6/0x100 [i915_bpo]
  [    8.506578]  [<ffffffffc0687d15>] intel_display_set_init_power+0x45/0x50 [i915_bpo]
  [    8.506587]  [<ffffffffc0687fa4>] intel_power_domains_init_hw+0x204/0x340 [i915_bpo]
  [    8.506606]  [<ffffffffc07275f4>] i915_driver_load+0x7d4/0xeb0 [i915_bpo]
  [    8.506608]  [<ffffffff813a97a0>] ? cleanup_uevent_env+0x10/0x10
  [    8.506610]  [<ffffffff813a9b58>] ? kobject_uevent_env+0x178/0x690
  [    8.506614]  [<ffffffff814fc000>] ? devtmpfs_create_node+0x100/0x130
  [    8.506616]  [<ffffffff814f0d77>] ? get_device+0x17/0x30
  [    8.506618]  [<ffffffff814f67b5>] ? klist_class_dev_get+0x15/0x20
  [    8.506620]  [<ffffffff8179fbe8>] ? klist_node_init+0x38/0x50
  [    8.506622]  [<ffffffff8179fc96>] ? klist_add_tail+0x46/0x50
  [    8.506624]  [<ffffffff814f2709>] ? device_add+0x289/0x650
  [    8.506632]  [<ffffffffc05d2685>] drm_dev_register+0xb5/0x110 [drm]
  [    8.506638]  [<ffffffffc05d55ff>] drm_get_pci_dev+0x8f/0x200 [drm]
  [    8.506649]  [<ffffffffc067523b>] i915_pci_probe+0x3b/0x60 [i915_bpo]
  [    8.506653]  [<ffffffff813f20b5>] local_pci_probe+0x45/0xa0
  [    8.506655]  [<ffffffff813f3355>] ? pci_match_device+0xe5/0x110
  [    8.506657]  [<ffffffff813f3499>] pci_device_probe+0xd9/0x130
  [    8.506660]  [<ffffffff814f5935>] driver_probe_device+0x155/0x400
  [    8.506662]  [<ffffffff814f5cbb>] __driver_attach+0x9b/0xa0
  [    8.506664]  [<ffffffff814f5c20>] ? __device_attach+0x40/0x40
  [    8.506666]  [<ffffffff814f37f3>] bus_for_each_dev+0x63/0xa0
  [    8.506669]  [<ffffffff814f52ce>] driver_attach+0x1e/0x20
  [    8.506671]  [<ffffffff814f4ec0>] bus_add_driver+0x180/0x240
  [    8.506673]  [<ffffffff814f64a4>] driver_register+0x64/0xf0
  [    8.506675]  [<ffffffff813f19fc>] __pci_register_driver+0x4c/0x50
  [    8.506682]  [<ffffffffc05d586a>] drm_pci_init+0xfa/0x130 [drm]
  [    8.506684]  [<ffffffffc078c000>] ? 0xffffffffc078c000
  [    8.506695]  [<ffffffffc078c0a0>] i915_init+0xa0/0xa8 [i915_bpo]
  [    8.506698]  [<ffffffff81002144>] do_one_initcall+0xd4/0x210
  [    8.506701]  [<ffffffff811cf4e9>] ? kmem_cache_alloc_trace+0x199/0x220
  [    8.506704]  [<ffffffff810f7e1c>] ? load_module+0x164c/0x1cc0
  [    8.506706]  [<ffffffff810f7e55>] load_module+0x1685/0x1cc0
  [    8.506708]  [<ffffffff810f3700>] ? store_uevent+0x40/0x40
  [    8.506710]  [<ffffffff810f8606>] SyS_finit_module+0x86/0xb0
  [    8.506713]  [<ffffffff817b770d>] system_call_fastpath+0x16/0x1b
  [    8.506714] Code: ff 93 c8 00 00 00 4c 89 e6 48 89 df 31 d2 ff 93 a8 00 00 00 5b 41 5c 5d c3 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 <8b> 47 68 83 f8 0b 74 33 83 f8 0a 74 1e 8d 48 fa 83 f9 02 76 16
  [    8.506732] RIP  [<ffffffffc0702e45>] ddi_get_encoder_port+0x5/0x70 [i915_bpo]
  [    8.506749]  RSP <ffff8802751cb750>
  [    8.506750] CR2: 0000000000000060
  [    8.506751] ---[ end trace bbc1959b1af7bdf6 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.19.0-43-generic 3.19.0-43.49~14.04.1
  ProcVersionSignature: Ubuntu 3.13.0-74.118-generic 3.13.11-ckt30
  Uname: Linux 3.13.0-74-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Jan 18 22:23:42 2016
  InstallationDate: Installed on 2013-04-02 (1022 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  SourcePackage: linux-lts-vivid
  UpgradeStatus: Upgraded to trusty on 2014-04-19 (639 days ago)

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