Forwarding this bug from Ubuntu reporter Martin Pool: http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/752157 [Problem] On RS880 solid grey rectangles appear over icon text and window borders in some applications in a compositing environment, namely Unity's launcher. Unity developers are able to reproduce this and say it is a video driver / mesa issue. [Original Description] on current natty, clicking the Ubuntu button in the top left shows a window with graphical corruption as shown in the attached screenshot. sometimes there are solid grey rectangles over the icon text too. DistroRelease: Ubuntu 11.04 Package: unity 3.8.2-0ubuntu1 ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2 Uname: Linux 2.6.38-8-generic x86_64 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,scale,session,unityshell] CompositorRunning: compiz DRM.card0.DVI.D.1: status: connected enabled: enabled dpms: On modes: 1920x1200 1600x1200 1680x1050 1280x1024 1280x1024 1152x864 1024x768 1024x768 800x600 800x600 640x480 640x480 720x400 edid-base64: AP///////wAQrDCgUzE0MBMTAQOAOiR46un1rFEwtCURUFSlSwCBgKlAcU+zAAEBAQEBAQEBKDyAoHCwI0AwIDYARmwhAAAaAAAA/wBSSzUxNDk1ODA0MVMKAAAA/ABERUxMIDI3MDlXCiAgAAAA/QA4TB5TEQAKICAgICAgAHU= DRM.card0.VGA.1: status: disconnected enabled: disabled dpms: On modes: edid-base64: Date: Wed Apr 6 13:21:21 2011 DistUpgraded: Log time: 2010-12-21 12:35:39.044742 DistroCodename: natty DistroVariant: ubuntu EcryptfsInUse: Yes GraphicsCard: ATI Technologies Inc RS880 [Radeon HD 4290] [1002:9714] (prog-if 00 [VGA controller]) Subsystem: Giga-byte Technology Device [1458:d000] MachineType: Gigabyte Technology Co., Ltd. GA-890GPA-UD3H ProcEnviron: LANGUAGE=en_AU:en PATH=(custom, user) LANG=en_AU.UTF-8 SHELL=/bin/zsh ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=/dev/mapper/vg_main-natty_64 ro clock=hpet quiet splash rootdelay=10 vt.handoff=7 ProcVersionSignature_: Ubuntu 2.6.38-8.41-generic 2.6.38.2 ProcVersionSignature__: Ubuntu 2.6.38-8.41-generic 2.6.38.2 Renderer: Unknown SourcePackage: unity UpgradeStatus: Upgraded to natty on 2010-12-21 (105 days ago) XorgConf: Section "Device" Identifier "Configured Video Device" Option "SWCursor" "on" EndSection dmi.bios.date: 05/04/2010 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F7c dmi.board.name: GA-890GPA-UD3H dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF7c:bd05/04/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-890GPA-UD3H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-890GPA-UD3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-890GPA-UD3H dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz 1:0.9.4git20110322-0ubuntu5 version.ia32-libs: ia32-libs 20090808ubuntu11 version.libdrm2: libdrm2 2.4.23-1ubuntu6 version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.1-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3 version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu6 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu6