Here is my xorg.conf for:
lspci output:
"VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY"
This is now nice and snappy with window rendering and all the corruption
issues have resolved. Scrolling in Firefox is also fine. If I try to
enable compiz, the whole system freezes, but since I don't bother with
it on this old 1 GHz celeron notebook, I don't miss it.
Section "Device"
Identifier "ATI Technologies Inc Radeon Mobility M6 LY"
Driver "ati"
BusID "PCI:1:0:0"
Option "AGPMode" "4"
Option "AGPSize" "64" # default: 8
Option "RingSize" "8"
Option "BufferSize" "2"
Option "EnablePageFlip" "True"
Option "EnableDepthMoves" "True"
Option "SWcursor" "off" #Faster than default (on)
Option "AccelMethod" "EXA"
Option "MigrationHeuristic" "greedy"
Option "AccelDFS" "true"
Option "BIOSHotkeys" "on"
Option "RenderAccel" "true" # Enables hardware acceleration
Option "DynamicClocks" "on" # Adds clock scalability / power
management for the video card
EndSection
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ATI graphics corruption with compiz on XAA
https://bugs.launchpad.net/bugs/429251
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