[Dri-users] Radeon: Video Ram not detected correctly

[Jan G. <g....@gm...>]

Hi,

I've got a notebook with a Mobility Radeon 9000 graphics chip with 64 MB
VRAM.
However, most of the time, Xorg does only detect 32 MB, although there
are some occassions (about one in 5-10 boots) when it correctly detects
the whole RAM.

This is an Xorg.0.log diff extract between the two cases:

------------------------------------------------------------------------
-(II) RADEON(0): Detected total video RAM=32768K, accessible=65536K (PCI BAR=131072K)
-(--) RADEON(0): Mapped VideoRAM: 32768 kByte (64 bit DDR SDRAM)
+(II) RADEON(0): Detected total video RAM=65536K, accessible=65536K (PCI BAR=131072K)
+(--) RADEON(0): Mapped VideoRAM: 65536 kByte (128 bit DDR SDRAM)
------------------------------------------------------------------------

Whole (failed) log and the complete diff attached.

I tried 
	Option "VideoRam" "65536"
in my xorg.conf but this gets ignored.

I only recently started to notice this behaviour when I installed Compiz
which fails to display maximized windows correctly (resolution
1440x1050) when only 32 MB are available.

Is there anything I could tweak or try? Any hints would be appreciated. 
If you need more infos, config files, etc. feel free to ask.

TIA,
Jan

PS: Please keep me CC'ed as I'm not suscribed.

Output of lspci -v:
------------------------------------------------------------------------
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 [Mobility FireGL 9000] (rev 01) (prog-if 00 [VGA])
        Subsystem: Acer Incorporated [ALI] Unknown device 001f
        Flags: bus master, stepping, fast Back2Back, 66MHz, medium devsel, latency 66, IRQ 10
        Memory at d8000000 (32-bit, prefetchable) [size=128M]
        I/O ports at 3000 [size=256]
        Memory at d0100000 (32-bit, non-prefetchable) [size=64K]
        [virtual] Expansion ROM at d0120000 [disabled] [size=128K]
        Capabilities: [58] AGP version 2.0
        Capabilities: [50] Power Management version 2
------------------------------------------------------------------------