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[Launchpad Bug Tracker <1157144@xxxxxxxxxxxxxxxxxx>]

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My 2nd monitor (a Samsung SyncMaster 930BF) worked perfectly up to
kernel 3.5.0.19-generic. Starting from 3.5.0-21-generic up to now
(3.5.0-32-generic) the display is not usable. It just flickers very
rapidly, making it impossible to work with.

I tried to use xrandr to set a lower display rate, or even to supply a custom modeline. Nothing works.
So now I just froze my kernel to 3.5.0-19 in the grub configuration, but I don't like it because I miss out on security updates.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
Uname: Linux 3.5.0-19-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Tue Mar 19 12:34:50 2013
DistUpgraded: 2012-10-19 11:20:50,891 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
DkmsStatus: vboxhost, 4.2.10, 3.5.0-19-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Advanced Micro Devices [AMD] nee ATI Whistler XT [AMD Radeon HD 6700M Series] [1002:6740] (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:04a3]
InstallationDate: Installed on 2012-05-14 (308 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MachineType: Dell Inc. Precision M4600
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=f306ac5b-7656-4877-bf0a-4c41123e513e ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to quantal on 2012-10-19 (151 days ago)
dmi.bios.date: 07/11/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 08V9YG
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA05:bd07/11/2011:svnDellInc.:pnPrecisionM4600:pvr01:rvnDellInc.:rn08V9YG:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Precision M4600
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.8.6-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.2-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.2-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Incomplete


** Tags: amd64 apport-bug compiz-0.9 quantal running-unity ubuntu
-- 
2nd monitor flickers since kernel 3.5.0-19
https://bugs.launchpad.net/bugs/1157144
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