Severe artifacts with Mobility M6 and XAA

[SadEagle]

Binary package hint: xserver-xorg-video-ati

(Note that the autosent xorg.conf has workarounds)

When using a nearly-empty/please-autodetect-everything Xorg.conf,
on Karmic RC, on ATI Radeon Mobility M6, no composite manager,
I am getting severe artifacts in KDE --- the plasma panel and window manager
decoration are entirely unpainted, just basically white with some noise.

Turning off the composite extension (even though cm wasn't on) fixes
Plasma but not kwin. Switching to EXA removes major[1] problems, but
is extraordinarily slow --- any animation, like say in kickoff, is just
unusable, and Xorg often uses 100% CPU.
[1] There are some occasional black lines on top of text, but rare and
not affecting system usability.

ProblemType: Bug
Architecture: i386
Date: Tue Oct 27 10:36:13 2009
DistroRelease: Ubuntu 9.10
Lsusb:
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: IBM 2672B1U
Package: xserver-xorg-video-radeon 1:6.12.99+git20090929.7968e1fb-0ubuntu1
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   no card
ProcCmdLine: root=UUID=c5c65678-eaf8-4e4c-8de6-0f79bc4bda58 ro
ProcEnviron:
 LANGUAGE=
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu7
 libgl1-mesa-glx 7.6.0-1ubuntu4
 libdrm2 2.4.14-1ubuntu1
 xserver-xorg-video-intel 2:2.9.0-1ubuntu2
 xserver-xorg-video-ati 1:6.12.99+git20090929.7968e1fb-0ubuntu1
SourcePackage: xserver-xorg-video-ati
Uname: Linux 2.6.31-14-generic i686
dmi.bios.date: 09/22/2005
dmi.bios.vendor: IBM
dmi.bios.version: 1QET97WW (3.02 )
dmi.board.name: 2672B1U
dmi.board.vendor: IBM
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: IBM
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnIBM:bvr1QET97WW(3.02):bd09/22/2005:svnIBM:pn2672B1U:pvrThinkPadX31:rvnIBM:rn2672B1U:rvrNotAvailable:cvnIBM:ct10:cvrNotAvailable:
dmi.product.name: 2672B1U
dmi.product.version: ThinkPad X31
dmi.sys.vendor: IBM
fglrx: Not loaded
system:
 distro: Ubuntu
 architecture: i686kernel: 2.6.31-14-generic