Forwarding this bug from Ubuntu reporter Brian Murray:
Drop down boxes for menus and context menus show a very brief artifacted box (looks like uninitialized graphics memory), before drawing the correct menu.
Typically it appears when you go to a window that hasn't been accessed in a while and then right click or open the menu. Subsequent menu activity in that window doesn't show the problem, but if you leave the window for a few minutes and then come back, it'll recur.
Unfortunately the display is so brief it's not possible to get a snapshot. Hopefully it's clear enough from the description.
It occurs with compositing either on or off, and has been occurring for the past month (I think coinciding with when we switched to r600g as the default in ubuntu).
When clicking a menu like View in Audacity or clicking a drop down list in Firefox I briefly see artifacts before the list or menu is rendered.
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-video-radeon 1:6.14.0-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic x86_64
Date: Mon Feb 28 12:53:01 2011
DistUpgraded: Yes, recently upgraded Log time: 2010-11-29 08:39:20.158516
ATI Technologies Inc RV730 PRO [Radeon HD 4650] [1002:9498] (prog-if 00 [VGA controller])
Subsystem: XFX Pine Group Inc. Device [1682:2451]
MachineType: Dell Inc. Dell DXP051
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-5-generic root=UUID=615bf598-a228-4bcc-9e4c-2aceb30c7c3e ro quiet splash vt.handoff=7
UpgradeStatus: Upgraded to natty on 2011-02-23 (4 days ago)
dmi.bios.vendor: Dell Inc.
dmi.board.vendor: Dell Inc.
dmi.chassis.vendor: Dell Inc.
dmi.product.name: Dell DXP051
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4-0ubuntu1
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1~git20110215.cc1636b6-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu8
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu11
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu5
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Here is a screenshot I made with my phone: http://launchpadlibrarian.net/66657228/corruption.png
Forgot to add that I notice this problem with my Radeon mobility X700 (R300g)
Same here, ATI Mobility Radeon 3470 (r600g), KDE 4.6.1, qt 4.7.2, xorg-server/mesa/libdrm/xf86-video-ati git master. It is there for a long time now, cannot say when it started. It is not very distracting, so I didn't report it. It is easily reproducible - just open any popup-menu and when it appears, the area looks corrupted (uninitialized?) until it is first drawn (happens very soon).
Sounds like bug 34427.
(In reply to comment #9)
> Sounds like bug 34427.
Indeed, proposed patch from bug 34427 solved this here.
*** This bug has been marked as a duplicate of bug 34427 ***