Comment 23 for bug 459961

I too have this problem:

# /usr/lib/xscreensaver/hyperspace
bo(0x2182ad0, 65536) is mapped (-1) can't valide it.
validated 0x2182ad0 [0xF47C2000, 0xF47D2000]
hyperspace: radeon_dma.c:210: radeonRefillCurrentDmaRegion: Assertion `dma_bo->bo->cref == 1' failed.

Originally saw it in ParaView, but hyperspace reproduces it more easily (in ParaView it seems to happen when I load a dataset over a certain size and try to manipulate the viewport in any way).

error is much the same from ParaView:

bo(0x36401e0, 65536) is mapped (-1) can't valide it.
validated 0x36401e0 [0xF47C2000, 0xF47D2000]
paraview-real: radeon_dma.c:210: radeonRefillCurrentDmaRegion: Assertion `dma_bo->bo->cref == 1' failed.

Some info from my system:

# uname -a
Linux Bilberry 2.6.31-15-generic #50-Ubuntu SMP Tue Nov 10 14:53:52 UTC 2009 x86_64 GNU/Linux
# cat /proc/meminfo | grep MemTotal
MemTotal: 1014032 kB
# lspci -nn | grep VGA
04:02.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE] [1002:5159]
# glxinfo | grep renderer
OpenGL renderer string: Mesa DRI R100 (RV100 5159) 20090101 NO-TCL
# glxinfo | grep "version string"
server glx version string: 1.2
client glx version string: 1.4
OpenGL version string: 1.3 Mesa 7.6
# cat /var/log/Xorg.0.log|grep RAM
(II) RADEON(0): Detected total video RAM=65536K, accessible=65536K (PCI BAR=131072K)
(--) RADEON(0): Mapped VideoRAM: 65536 kByte (64 bit DDR SDRAM)

with version 7.6.0-1ubuntu4 of libgl1-mesa-glx (and related mesa packages) installed

I've only just installed Ubuntu 9.10 and had not tested either of these apps before to know if its a new problem or not.