Using a Thinkpad T41 with Radeon 9000 (r250) @1400x1050 on Ubuntu 7.10
(Gutsy Gibbon):

I also have felt the love from compiz now that I modified xorg.conf
Thanks to the folks here I reduced default depth from 24 to 16 and
miracles of miracles, it works.

Because of the bug in the compiz wrapper for ati, I have to run it as
">SKIP_CHECKS=yes compiz" to get it to work.  But after that works
great, no crashes, resume after suspend ok....

Here is the relevant section from xorg.conf


 Section "Device"
        Identifier      "Radeon 9000"
        Driver          "ati"
        BusID           "PCI:1:0:0"
        Option          "XAANoOffscreenPixmaps"
EndSection

Section "Monitor"
        Identifier      "Generic Monitor"
        Option          "DPMS"
        HorizSync       30-70
        VertRefresh     50-160
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Device          "Radeon 9000"
        Monitor         "Generic Monitor"
        DefaultDepth    16
        SubSection      "Display"
                Depth   16
#               Virtual 1600 1200    # seems to work without this hack
                Modes   "1400x1050"
        EndSubSection
EndSection

Section "ServerLayout"
        Option          "AIGLX" "true"
        Identifier      "Default Layout"
        Screen          "Default Screen"
        InputDevice     "Generic Keyboard"
        InputDevice     "Configured Mouse"
EndSection

Section "DRI"
        Mode    0666
EndSection

Section "Extensions"
        Option "Composite" "Enable"
EndSection

-- 
need to add max texture size check
https://bugs.launchpad.net/bugs/124519
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