Public bug reported:

The following occurred after I updated from Quantal to Raring.

I have an i5 2500K Sandy Bridge. When I remove /etc/X11/xorg.conf and
login to lightdm, SNA is used, but this causes my second monitor to go
out of sync, and my first monitor stops updating (though the mouse
cursor works). I am forced to do Ctrl+Alt+F1 to reboot.

When I create the following xorg.conf:

Section "Device"
        Identifier "intel"
        Driver "intel"
        Option "AccelMethod" "uxa"
EndSection

Everything works, but sometimes, Xorg locks up for a few seconds.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
ProcVersionSignature: Ubuntu 3.8.0-14.24-generic 3.8.4
Uname: Linux 3.8.0-14-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.9.2-0ubuntu5
Architecture: amd64
CompizPlugins: 
[core,crashhandler,composite,opengl,compiztoolbox,decor,dbus,notification,grid,move,mousepoll,session,regex,resize,resizeinfo,scale,animation,workarounds,expo,unityshell]
CompositorRunning: None
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order 
/var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission 
denied
Date: Wed Mar 27 16:53:06 2013
DistUpgraded: 2013-03-19 01:28:15,517 DEBUG failed to SystemUnLock() (E:Not 
locked)
DistroCodename: raring
DistroVariant: ubuntu
DkmsStatus:
 vboxhost, 4.2.10, 3.5.0-26-generic, x86_64: installed
 vboxhost, 4.2.10, 3.8.0-13-generic, x86_64: installed
 vboxhost, 4.2.10, 3.8.0-14-generic, x86_64: installed
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics 
Controller [8086:0112] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. Device [1462:7676]
InstallationDate: Installed on 2011-06-11 (655 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: MSI MS-7676
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-14-generic 
root=UUID=7f1427f0-8ec2-41a4-96e8-5987dd9beaa4 ro elevator=noop quiet splash 
vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to raring on 2013-03-19 (8 days ago)
dmi.bios.date: 05/04/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V10.2
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z68MA-ED55 (MS-7676)
dmi.board.vendor: MSI
dmi.board.version: 2.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 2.0
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrV10.2:bd05/04/2011:svnMSI:pnMS-7676:pvr2.0:rvnMSI:rnZ68MA-ED55(MS-7676):rvr2.0:cvnMSI:ct3:cvr2.0:
dmi.product.name: MS-7676
dmi.product.version: 2.0
dmi.sys.vendor: MSI
version.compiz: compiz 1:0.9.9~daily13.03.25-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.43-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.3-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.3-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
xserver.bootTime: Wed Mar 27 13:31:49 2013
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.3-0ubuntu4
xserver.video_driver: intel

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug raring ubuntu

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1161112

Title:
  Raring regression: SNA fails completely; UXA causes random hangs

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1161112/+subscriptions

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