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[LibertyZero <liberty.zero@xxxxxxxxx>]

I tested:
mesa 7.6.0-1ubuntu4
mesa 7.6.1-rc1 git (the one mentioned above)
kernel 2.6.31-14
kernel 2.6.32-020632rc7-generic

System Ram: 1.2 GiB

liberty@acer:~$ lspci -nn | grep VGA
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc M9+ 5C61 [Radeon Mobility 9200 (AGP)] [1002:5c61] (rev 01)

liberty@acer:~$ cat /var/log/Xorg.0.log|grep RAM
(II) RADEON(0): Detected total video RAM=65536K, accessible=131072K (PCI BAR=131072K)
(--) RADEON(0): Mapped VideoRAM: 65536 kByte (128 bit DDR SDRAM)

liberty@acer:~$ glxinfo |grep renderer
OpenGL renderer string: Mesa DRI R200 (RV280 5C61) 20090101 AGP 4x x86/MMX/SSE2 TCL

While running compiz hyperspace terminates immediately after showing the
first frame:

liberty@acer:~$ /usr/lib/xscreensaver/hyperspace 
bo(0xa30c230, 65536) is mapped (-1) can't valide it.
validated 0xa30c230 [0xB07C2000, 0xB07D2000]
hyperspace: radeon_dma.c:210: radeonRefillCurrentDmaRegion: Assertion `dma_bo->bo->cref == 1' failed.
Aborted

Without compiz hyperspace seems to work normal but as soon as the
hyperspace window is completely covered by another window the system
freezes.

Openarena seems to work fine here with and without compositing.

In Jaunty (Mesa 7.4) I did NOT encountered this problem.

-- 
radeon_dma.c:210: radeonRefillCurrentDmaRegion: Assertion `dma_bo->bo->cref == 1' failed.
https://bugs.launchpad.net/bugs/459961
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