Switching to AccelMethod "EXA" removes the artifacts, but is terribly
slow. I've downgraded to Jaunty's xserver-xorg-video-ati and -radeon
drivers, and have no problems with the AccelMethod "XAA" now.
lspci -vvv for the graphics card:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY
Subsystem: IBM Device 0235
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR+ FastB2B+ DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 66 (2000ns min), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 11
Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M]
Region 1: I/O ports at 3000 [size=256]
Region 2: Memory at c0100000 (32-bit, non-prefetchable) [size=64K]
[virtual] Expansion ROM at c0120000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel modules: radeon, radeonfb
--
KDE kicker, menu and apps titlebar not viewable
https://bugs.launchpad.net/bugs/434376
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