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[jhansonxi <1310823@xxxxxxxxxxxxxxxxxx>]

I'm encountering the same problems with my Dell Inspiron 1525 and
Xubuntu 14.04 (Trusty Tahr) x86_64.  Most any display change (blanking,
add/removing external monitor) results in a non-fatal error:

May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784402] CPU: 1 PID: 1546 Comm: Xorg Tainted: PF       W  O 3.13.0-24-generic #46-Ubuntu
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784407] Hardware name: Dell Inc. Inspiron 1525                   /0U990C, BIOS A11 03/10/2008
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784412]  0000000000000009 ffff88007918dbb8 ffffffff81715a64 0000000000000000
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784423]  ffff88007918dbf0 ffffffff810676bd ffff880035d0b000 0000000000000000
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784433]  ffff880035c17800 ffff880035c17af8 ffff880056704ca0 ffff88007918dc00
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784443] Call Trace:
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784456]  [<ffffffff81715a64>] dump_stack+0x45/0x56
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784467]  [<ffffffff810676bd>] warn_slowpath_common+0x7d/0xa0
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784475]  [<ffffffff8106779a>] warn_slowpath_null+0x1a/0x20
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784521]  [<ffffffffa00ba232>] intel_modeset_check_state+0x6f2/0x780 [i915]
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784568]  [<ffffffffa00ba355>] intel_set_mode+0x25/0x30 [i915]
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784615]  [<ffffffffa00babfb>] intel_crtc_set_config+0x7ab/0x9a0 [i915]
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784657]  [<ffffffffa000fe9d>] drm_mode_set_config_internal+0x5d/0xe0 [drm]
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784696]  [<ffffffffa0012d87>] drm_mode_setcrtc+0xf7/0x5e0 [drm]
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784725]  [<ffffffffa0003c22>] drm_ioctl+0x502/0x630 [drm]
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784743]  [<ffffffff811cc6e0>] do_vfs_ioctl+0x2e0/0x4c0
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784752]  [<ffffffff8109dd84>] ? vtime_account_user+0x54/0x60
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784761]  [<ffffffff811cc941>] SyS_ioctl+0x81/0xa0
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784771]  [<ffffffff8172663f>] tracesys+0xe1/0xe6
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.784776] ---[ end trace 7832e5d6c3fcdce6 ]---
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.790057] ------------[ cut here ]------------
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.790120] WARNING: CPU: 1 PID: 1546 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:9226 intel_modeset_check_state+0x62d/0x780 [i915]()
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.790123] encoder's hw state doesn't match sw tracking (expected 0, found 1)
May 20 19:03:18 jhansonxi-l4 kernel: [ 8205.790125] Modules linked in:...

Suspend/hibernate fails also.  Closing the lid results in a freeze.

The "encoder's hw state doesn't match sw tracking" seems to be the problem.  A fix for the same error was made last year:
http://linux-kernel.2935.n7.nabble.com/Re-Re-drm-i915-new-warning-regression-in-3-7-10-and-3-8-3-td631548.html
https://bugzilla.redhat.com/show_bug.cgi?id=962386

The current problem may be another regression.  Others encountered a similar problem with 3.13:
https://lkml.org/lkml/2013/12/17/796


** Bug watch added: Red Hat Bugzilla #962386
   https://bugzilla.redhat.com/show_bug.cgi?id=962386

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https://bugs.launchpad.net/bugs/1310823

Title:
  [Dell Inspiron 1525] Ubuntu freezes when lid closed

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Hi. I'm using Dell Inspiron 1525 for several years and it was used
  with Ubuntu since 10.04 or so.

  After upgrading from 13.10 to 14.04 my PC started to freeze completely
  (no response from anything, requires hard reboot) if I'm closing the
  lid or display turning off due to inactivity timeout. I also had this
  problem after wake from suspend, but recently got kernel update and
  looks like it was fixed (no freezes after wake up). I tried fresh
  install of 14.04 that I'm using right now, but it doesn't help.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  NonfreeKernelModules: wl
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3
  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: Tue Apr 22 02:07:31 2014
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus: bcmwl, 6.30.223.141+bdcom, 3.13.0-24-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GpuHangFrequency: Several times a day
  GpuHangReproducibility: Yes, I can easily reproduce it
  GpuHangStarted: Immediately after installing this version of Ubuntu
  GraphicsCard:
   Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 0c) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:022f]
     Subsystem: Dell Device [1028:022f]
  InstallationDate: Installed on 2014-04-20 (1 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Dell Inc. Inspiron 1525
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-24-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/16/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A16
  dmi.board.name: 0U990C
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA16:bd10/16/2008:svnDellInc.:pnInspiron1525:pvr:rvnDellInc.:rn0U990C:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Inspiron 1525
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Tue Apr 22 01:39:40 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                9076 
   vendor                                     AUO
  xserver.version: 2:1.15.1-0ubuntu2

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