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[CB <1479321@xxxxxxxxxxxxxxxxxx>]

I  just booted with 4.3.0-040300rc2-generic and there is still one
kernel crash and some i915 errors:

[   12.072417] ------------[ cut here ]------------
[   12.072443] WARNING: CPU: 2 PID: 173 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_display.c:1056 intel_disable_pipe+0x2a2/0x2d0 [i915]()
[   12.072444] pipe_off wait timed out
[   12.072462] Modules linked in: crct10dif_pclmul nf_conntrack crc32_pclmul ghash_clmulni_intel iptable_filter ip_tables aesni_intel x_tables aes_x86_64 hp_wmi lrw gf128mul sparse_keymap glue_helper ablk_helper cryptd snd_hda_intel(+) snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi i915(+) snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device ppdev coretemp snd_timer drm_kms_helper snd drm soundcore lp parport_pc serio_raw wmi 8250_fintek ie31200_edac input_leds parport i2c_algo_bit lpc_ich tpm_infineon fb_sys_fops mei_me syscopyarea sysfillrect sysimgblt video mei mac_hid edac_core hid_generic usbhid hid psmouse e1000e ahci r8169 libahci ptp mii pps_core fjes
[   12.072463] CPU: 2 PID: 173 Comm: kworker/u8:5 Not tainted 4.3.0-040300rc2-generic #201509201830
[   12.072464] Hardware name: Hewlett-Packard HP Compaq Pro 6300 MT/339A, BIOS K01 v02.98 03/18/2015
[   12.072467] Workqueue: events_unbound async_run_entry_fn
[   12.072469]  ffffffffc037dd08 ffff88003640b830 ffffffff813a5f9d ffff88003640b878
[   12.072470]  ffff88003640b868 ffffffff8107a566 ffff88020d060000 0000000000071008
[   12.072470]  00000000fffee6ce 0000000000071008 ffff880036b25000 ffff88003640b8c8
[   12.072471] Call Trace:
[   12.072476]  [<ffffffff813a5f9d>] dump_stack+0x44/0x57
[   12.072477]  [<ffffffff8107a566>] warn_slowpath_common+0x86/0xc0
[   12.072478]  [<ffffffff8107a5ec>] warn_slowpath_fmt+0x4c/0x50
[   12.072494]  [<ffffffffc03159f2>] intel_disable_pipe+0x2a2/0x2d0 [i915]
[   12.072509]  [<ffffffffc0315d95>] ironlake_crtc_disable+0x85/0x7c0 [i915]
[   12.072522]  [<ffffffffc0310d7c>] ? intel_crtc_disable_planes+0xdc/0xf0 [i915]
[   12.072535]  [<ffffffffc031e6c5>] intel_atomic_commit+0xf5/0x5f0 [i915]
[   12.072547]  [<ffffffffc01aea69>] ? drm_atomic_get_connector_state+0x49/0x130 [drm]
[   12.072554]  [<ffffffffc01af1b7>] drm_atomic_commit+0x37/0x60 [drm]
[   12.072559]  [<ffffffffc02304be>] drm_atomic_helper_set_config+0x38e/0x400 [drm_kms_helper]
[   12.072566]  [<ffffffffc019ed74>] drm_mode_set_config_internal+0x64/0x100 [drm]
[   12.072570]  [<ffffffffc023309e>] restore_fbdev_mode+0xbe/0xe0 [drm_kms_helper]
[   12.072573]  [<ffffffffc0234e05>] drm_fb_helper_restore_fbdev_mode_unlocked+0x25/0x70 [drm_kms_helper]
[   12.072576]  [<ffffffffc0234e7c>] drm_fb_helper_set_par+0x2c/0x50 [drm_kms_helper]
[   12.072591]  [<ffffffffc0332bea>] intel_fbdev_set_par+0x1a/0x60 [i915]
[   12.072593]  [<ffffffff8141d566>] fbcon_init+0x4c6/0x550
[   12.072596]  [<ffffffff814a7d4a>] visual_init+0xca/0x130
[   12.072597]  [<ffffffff814aa366>] do_bind_con_driver+0x146/0x310
[   12.072598]  [<ffffffff814aa851>] do_take_over_console+0x141/0x1b0
[   12.072600]  [<ffffffff81418767>] do_fbcon_takeover+0x57/0xb0
[   12.072600]  [<ffffffff8141df6b>] fbcon_event_notify+0x60b/0x750
[   12.072602]  [<ffffffff81099229>] notifier_call_chain+0x49/0x70
[   12.072603]  [<ffffffff8109954d>] __blocking_notifier_call_chain+0x4d/0x70
[   12.072604]  [<ffffffff81099586>] blocking_notifier_call_chain+0x16/0x20
[   12.072605]  [<ffffffff814236bb>] fb_notifier_call_chain+0x1b/0x20
[   12.072606]  [<ffffffff8142559e>] register_framebuffer+0x1de/0x300
[   12.072609]  [<ffffffffc02350f2>] drm_fb_helper_initial_config+0x252/0x390 [drm_kms_helper]
[   12.072624]  [<ffffffffc0333ceb>] intel_fbdev_initial_config+0x1b/0x20 [i915]
[   12.072625]  [<ffffffff8109ad58>] async_run_entry_fn+0x48/0x150
[   12.072626]  [<ffffffff810924fe>] process_one_work+0x14e/0x3d0
[   12.072627]  [<ffffffff81092baa>] worker_thread+0x11a/0x470
[   12.072628]  [<ffffffff81092a90>] ? rescuer_thread+0x310/0x310
[   12.072630]  [<ffffffff810982f9>] kthread+0xc9/0xe0
[   12.072631]  [<ffffffff81098230>] ? kthread_park+0x60/0x60
[   12.072632]  [<ffffffff817b34cf>] ret_from_fork+0x3f/0x70
[   12.072634]  [<ffffffff81098230>] ? kthread_park+0x60/0x60
[   12.072634] ---[ end trace d79f76ace2b092d5 ]---
[   12.136497] [drm:ironlake_crtc_disable [i915]] *ERROR* failed to disable transcoder B
[   12.139041] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A
[   12.139057] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
[   12.139077] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder B
[   12.139091] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder B FIFO underrun


** Tags added: kernel-bug-exists-upstream kernel-fixed-upstream-4.3-rc2

** Tags removed: kernel-fixed-upstream-4.3-rc2
** Tags added: kernel-bug-exists-upstream-4.3-rc2

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

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https://bugs.launchpad.net/bugs/1479321

Title:
  WARNING: CPU: 1 PID: 207 at /build/linux-lts-vivid-3x86XO/linux-lts-
  vivid-3.19.0/drivers/gpu/drm/i915/intel_display.c:958

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Every now and than my desktop freezes for a couple of minutes.  I can
  move the mouse pointer but it gets stuck in a single display (I have
  two).

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8.1
  ProcVersionSignature: Ubuntu 3.16.0-45.60~14.04.1-generic 3.16.7-ckt14
  Uname: Linux 3.16.0-45-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Wed Jul 29 08:38:07 2015
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   virtualbox, 4.3.10, 3.16.0-43-generic, x86_64: installed
   virtualbox, 4.3.10, 3.16.0-45-generic, x86_64: installed
  ExtraDebuggingInterest: I just need to know a workaround
  GpuHangFrequency: Several times a week
  GpuHangReproducibility: Seems to happen randomly
  GpuHangStarted: Immediately after installing this version of Ubuntu
  GraphicsCard:
   Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0152] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:339a]
  InstallationDate: Installed on 2015-04-10 (109 days ago)
  InstallationMedia: It
  MachineType: Hewlett-Packard HP Compaq Pro 6300 MT
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-45-generic root=UUID=88d8ecda-fb83-4942-83db-bbb2ee83be80 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/16/2013
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: K01 v02.90
  dmi.board.asset.tag: BRJ40510V4
  dmi.board.name: 339A
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: BRJ40510V4
  dmi.chassis.type: 6
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrK01v02.90:bd07/16/2013:svnHewlett-Packard:pnHPCompaqPro6300MT:pvr:rvnHewlett-Packard:rn339A:rvr:cvnHewlett-Packard:ct6:cvr:
  dmi.product.name: HP Compaq Pro 6300 MT
  dmi.sys.vendor: Hewlett-Packard
  version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2~ubuntu14.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri N/A
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core N/A
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
  xserver.bootTime: Wed Jul 29 08:19:44 2015
  xserver.configfile: default
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        Power Button         KEYBOARD, id 7
   input        CHICONY HP Basic USB Keyboard KEYBOARD, id 8
   input        PixArt USB Optical Mouse MOUSE, id 9
   input        HP WMI hotkeys       KEYBOARD, id 10
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               12387 
   vendor                                     HWP
  xserver.version: 2:1.16.0-1ubuntu1.2~trusty2

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