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[linas <linasvepstas@xxxxxxxxx>]

Please also see https://bugs.launchpad.net/ubuntu/+source/linux-lts-
raring/+bug/1097178

These Xorg errors seem to be a side-effect of X hanging in
uninteruptible sleep, in the kernel: i.e. a nouveau kernel module issue.
At least for me. See the bug I just quoted for details.

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https://bugs.launchpad.net/bugs/1222791

Title:
  1002:94c3 (EE) [mi] EQ overflowing. Additional events will be
  discarded until existing events are processed

Status in “xorg” package in Ubuntu:
  Expired

Bug description:
  Random screen freezes (see also https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1184451).
  Sometimes system is hanging and it looks like swapping is active (but swap is disabled completely), no response to either mouse/keyboard. Switching to terminals (Ctrl+Alt+F1-F6) and Alt+SysRq is still working. In Xorh.0.log there are next messages:

  [258008.925] [mi] EQ overflowing.  Additional events will be discarded until existing events are processed.
  [258009.690] [mi] These backtraces from mieqEnqueue may point to a culprit higher up the stack.
  [258009.690] [mi] mieq is *NOT* the cause.  It is a victim.
  [258009.690] [mi] Increasing EQ size to 512 to prevent dropped events.
  [258009.691] [mi] EQ processing has resumed after 67 dropped events.
  [258009.691] [mi] This may be caused my a misbehaving driver monopolizing the server's resources.

  I use radeon driver.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xorg 1:7.7+1ubuntu4
  ProcVersionSignature: Ubuntu 3.8.0-30.44-generic 3.8.13.6
  Uname: Linux 3.8.0-30-generic i686
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: i386
  CompizPlugins: [core,composite,opengl,decor,vpswitch,compiztoolbox,move,gnomecompat,snap,imgpng,regex,animation,grid,mousepoll,place,obs,resize,expo,wall,workarounds,session,fade,ezoom,scale]
  CompositorRunning: None
  Date: Mon Sep  9 16:00:46 2013
  DistUpgraded: 2013-05-24 14:43:41,354 DEBUG enabling apt cron job
  DistroCodename: raring
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Advanced Micro Devices [AMD] nee ATI RV610 [Radeon HD 2400 PRO] [1002:94c3] (prog-if 00 [VGA controller])
     Subsystem: PC Partner Limited Device [174b:e370]
  InstallationDate: Installed on 2011-01-28 (954 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-30-generic root=UUID=172134af-724c-40b6-a610-6c2214bca596 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: Upgraded to raring on 2013-05-24 (108 days ago)
  dmi.bios.date: 11/08/2005
  dmi.bios.vendor: Award BIOS for Intel
  dmi.bios.version: GC11010N.86A.0303.2005.1108.2057
  dmi.board.name: D101GGC
  dmi.board.vendor: Intel Corporation
  dmi.board.version: AAD35788-304
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnAwardBIOSforIntel:bvrGC11010N.86A.0303.2005.1108.2057:bd11/08/2005:svn:pn:pvr:rvnIntelCorporation:rnD101GGC:rvrAAD35788-304:cvn:ct3:cvr:
  version.compiz: compiz 1:0.9.9~daily13.06.19~13.04-0ubuntu1
  version.libdrm2: libdrm2 2.4.43-0ubuntu1.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.4-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.4-0ubuntu0.1
  version.xserver-xorg-core: xserver-xorg-core 3:1.12.4+git20121105-makson1~ppa2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 2:2.7.3+git20120928~quantal2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 2:6.14.6+git20120928~quantal1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 3:2.20.8+git20120928~quantal2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
  xserver.bootTime: Fri Sep  6 15:23:51 2013
  xserver.configfile: /etc/X11/xorg.conf
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        Power Button         KEYBOARD, id 7
   input        AT Translated Set 2 keyboard KEYBOARD, id 8
   input        ImPS/2 Generic Wheel Mouse MOUSE, id 9
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 3:1.12.4+git20121105-makson1~ppa2
  xserver.video_driver: radeon

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