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[Marius Gedminas <marius@xxxxxx>]

Public bug reported:

Binary package hint: xorg

After upgrading to Maverick, I've been noticing X freezes that happen after I unplug an external monitor and run xrandr --auto to reconfigure from dual-head to single-head mode.  Symptoms include:
  * black screen
  * no reaction to CapsLock
  * working network
  * X.org eating 100% CPU
  * "[mi] EQ overflowing" in Xorg.0.log
  * "no error state collected" in /sys/kernel/debug/dri/0/i915_error_state
  * nothing out of the ordinary in dmesg

I've been running with Apport enabled in /etc/default/apport, in hopes
that it will notice the freeze and collect a batchbuffer dump, as
described in https://wiki.ubuntu.com/X/Troubleshooting/Freeze.  This
does not appear to be happening :(

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic 2.6.35.8
Uname: Linux 2.6.35-24-generic i686
Architecture: i386
DRM.card0.DVI.D.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x800
 edid-base64: AP///////wAwrlBAAAAAAAAQAQOAIRV46rNwmVlTjScjUFQAAAABAQEBAQEBAQEBAQEBAQEBEhsAgFAgEDAYIEQAS88QAAAZcRYAgFAgEDAYIEQAS88QAAAZAAAADwCBCjKBCigUAQAyDAAAAAAA/gAxNTRXMDEtVExFNQogAFQ=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
Date: Wed Dec 22 21:41:51 2010
DkmsStatus:
 virtualbox-ose, 3.2.8, 2.6.32-25-generic, i686: built 
 virtualbox-ose, 3.2.8, 2.6.35-23-generic, i686: installed 
 virtualbox-ose, 3.2.8, 2.6.35-22-generic, i686: installed 
 virtualbox-ose, 3.2.8, 2.6.35-24-generic, i686: installed
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MachineType: LENOVO 646655G
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-24-generic root=UUID=4efb22e5-85e5-4a14-9eaa-4f4435e321c3 ro quiet splash
ProcEnviron:
 LANGUAGE=lt_LT:lt:en_GB:en
 LC_CTYPE=lt_LT.UTF-8
 PATH=(custom, user)
 LANG=lt_LT.utf8
 SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
dmi.bios.date: 12/06/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 7LETA7WW (2.07 )
dmi.board.name: 646655G
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7LETA7WW(2.07):bd12/06/2007:svnLENOVO:pn646655G:pvrThinkPadT61:rvnLENOVO:rn646655G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 646655G
dmi.product.version: ThinkPad T61
dmi.sys.vendor: LENOVO
system:
 distro:             Ubuntu
 codename:           maverick
 architecture:       i686
 kernel:             2.6.35-24-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug freeze i386 maverick

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https://bugs.launchpad.net/bugs/693540

Title:
  Xorg freeze on xrandr --auto