The problem seems to be an upstream one as seen in the comments
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https://bugs.launchpad.net/bugs/1085338
Title:
One pixel column that belongs in one monitor shows up in the other
instead
Status in X.org XServer - ATI gfx chipset driver:
Won't Fix
Status in “xserver-xorg-video-ati” package in Ubuntu:
Incomplete
Bug description:
I have configured the laptop screen in the left and a external monitor
in the right. On the left most part of the monitor, I can see 1 column
of pixels that belong to the content that is in the right most part of
the laptop.
Strangely, it does not show up when I try to do a screenshot, but is
quite evident when watching a fullscreen movie in the monitor, for
example.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.7.0-4.12-generic 3.7.0-rc7
Uname: Linux 3.7.0-4-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.6.3-0ubuntu2
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: Sat Dec 1 12:42:13 2012
DistUpgraded: 2012-11-25 13:52:25,604 DEBUG enabling apt cron job
DistroCodename: raring
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 4.1.22, 3.7.0-3-generic, x86_64: installed
virtualbox, 4.1.22, 3.7.0-4-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
Advanced Micro Devices [AMD] nee ATI Wrestler [Radeon HD 6310] [1002:9802]
(prog-if 00 [VGA controller])
Subsystem: Sony Corporation Device [104d:9082]
InstallationDate: Installed on 2012-11-25 (6 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120627)
MachineType: Sony Corporation VPCYB16KG
MarkForUpload: True
ProcEnviron:
LANGUAGE=en_SG:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_SG.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.7.0-4-generic
root=UUID=c5e8db97-be79-41c7-a2d8-be5fa7b409a8 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to raring on 2012-11-25 (5 days ago)
dmi.bios.date: 12/22/2010
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: R0160Z7
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnInsydeCorp.:bvrR0160Z7:bd12/22/2010:svnSonyCorporation:pnVPCYB16KG:pvrC900K9AU:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VPCYB16KG
dmi.product.version: C900K9AU
dmi.sys.vendor: Sony Corporation
version.compiz: compiz 1:0.9.8.4+bzr3412-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.40-1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.1-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.1-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu8
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.0.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.14-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.4-0ubuntu1
xserver.bootTime: Fri Nov 30 13:03:50 2012
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.0-0ubuntu8
xserver.video_driver: radeon
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