Forwarding this bug from Ubuntu reporter Jay Taoko: http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/715405 [Problem] Rendering corruption is seen in tooltips (see screenshots). This was reported by a user and reproduced by Jay who is one of the Unity/Compiz developers. [Original Description] Some lines appears above the tooltip when running Unity on an ATI gpu with the open source driver. It does not happen with other GPU. The problem is random and shows up on a few of the tooltips only. To reproduce, move the mouse over the launcher icons (to bring up the tooltips) for a little while. It is best if you have many icons in the launcher. Shortly after, some tooltips will exhibit the problem. DistroRelease: Ubuntu 11.04 Package: xserver-xorg-video-ati 1:6.13.2+git20110124.fadee040-0ubuntu4 ProcVersionSignature: Ubuntu 2.6.38-2.29-generic-pae 2.6.38-rc3 Uname: Linux 2.6.38-2-generic-pae i686 Architecture: i386 CompositorRunning: compiz DRM.card0.DIN.1: status: disconnected enabled: disabled dpms: On modes: edid-base64: Date: Tue Feb 8 15:39:11 2011 DistUpgraded: Yes, recently upgraded Log time: 2011-01-28 11:00:32.139757 DistroCodename: natty DistroVariant: ubuntu GraphicsCard: Subsystem: PC Partner Limited Radeon HD 4670 512MB DDR3 [174b:e880] InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007) MachineType: System manufacturer System Product Name ProcEnviron: LANGUAGE=en_CA:en LANG=en_CA.UTF-8 LC_MESSAGES=en_CA.utf8ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-2-generic-pae root=UUID=96c603fd-a46b-4516-ac34-28d1de74227b ro quiet splash vt.handoff=7 SourcePackage: xserver-xorg-video-ati dmi.bios.date: 11/18/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0701 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P8P67 PRO dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0701:bd11/18/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8P67PRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer version.compiz: compiz 1:0.9.2.1+glibmainloop4-0ubuntu9 version.libdrm2: libdrm2 2.4.23-1ubuntu3 version.libgl1-mesa-glx: libgl1-mesa-glx 7.10-1ubuntu1 version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu3 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.13.2+git20110124.fadee040-0ubuntu4 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu6 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu4
Created attachment 43128 [details] XorgLog.txt
Created attachment 43129 [details] glxinfo.txt
Created attachment 43130 [details] BootDmesg.txt
Created attachment 43131 [details] CurrentDmesg.txt
Created attachment 43132 [details] Screenshot.png
For reference, the following bug was the original user report of the issue: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/684992 "It doesn't happen immediately on boot but after about half an hour after I've run some applications. Happens to a different tooltip everytime, but once it happens that tooltip's stuck with the artefact until reboot."
(In reply to comment #6) > "[...] Happens to a different tooltip everytime, but once it happens that > tooltip's stuck with the artefact until reboot." So Unity caches the tooltip images? Does this also happen with the r600g driver?
I want to add that I have seen a similar bug in Firefox 4.0 (beta 10) while running the classic gnome desktop. See the attached screenshot. When I move the mouse over the forward button, the tooltip shows up and exhibit the same problem. The forward button itself also features 2 vertical parallel lines.
Created attachment 43161 [details] Firefox tooltip bug
Btw, Jay mentioned to me that he does still have this issue with current Ubuntu (which *should* be r600g unless Jay has specifically configured his system otherwise). Jay, can you please post your current dmesg, Xorg.0.log, and screenshot of this tooltip corruption issue? (Fwiw, I'm not able to reproduce this corruption with unity on RV770)
Created attachment 45772 [details] Rendering artifact in Unity Dash
Created attachment 45773 [details] dmesg.txt
Created attachment 45774 [details] Xorg.0.log
Created attachment 45775 [details] glxinfo.txt
I added a more recent snapshot of the bug in the Unity Dash.
Any suggestions on how we could go about further diagnosing this problem, or any branches/patches we should try testing?
(In reply to comment #16) > Any suggestions on how we could go about further diagnosing this problem, or > any branches/patches we should try testing? Keep trying newer versions of r600g and the kernel. Ideally you could find a small test that can reliably reproduce the problem. You might also try enabling tiling: Option "ColorTiling" "Enable" in the device section of your xorg.conf
Closing reopen if it's still an issue with 3.2 kernel or newer and 8.0 mesa or newer.
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