I just got an answer in there: "This is a limitation due to the way xrandr works. It uses a single surface for all enabled displays rather than one surface per display. The display hardware has alignment requirements that can cause this situation since we align the start address down. The per-crtc pixmaps work should fix the issue when it finally goes into the xserver."
Now I have a doubt on what's the best procedure to deal with this. Should we leave this bug report open until xrandx 1.4 is in ubuntu and the problem is actually fixed, or it's declared as closed? In my opinion, the bug should be kept open until the moment it's actually fixed, even if waiting for upstream. ** Bug watch added: freedesktop.org Bugzilla #58652 https://bugs.freedesktop.org/show_bug.cgi?id=58652 ** Also affects: xserver-xorg-driver-ati via https://bugs.freedesktop.org/show_bug.cgi?id=58652 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-ati in Ubuntu. 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: Unknown Status in “xserver-xorg-video-ati” package in Ubuntu: New 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 To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-driver-ati/+bug/1085338/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp