Bug#319689: Radeon default AGPMode

[Kaare Hviid <ukh@id.cbs.dk>]

I don't know if this is related, but using 6.9.0.dfsg.1-2 on amd64
2.6.14 and 2.6.15 systems, I have a similar lockup if the *glx* module
is enabled.  Forcing the AGPMode appears to help.  My particular card is
a 9200 (non-SE).  I've also had two reports of this helping on 9600
cards.  In Section "Device", try adding

	Option	"AGPMode"	"8"

That is, the default AGPMode (1x?) doesn't work anymore on all radeon
cards.

My `lspci -v` output:

0000:01:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200] (rev 01) (prog-if 00 [VGA])
        Subsystem: PC Partner Limited: Unknown device 7c11
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 16
        Memory at d0000000 (32-bit, prefetchable) [size=128M]
        I/O ports at c000 [size=256]
        Memory at fd800000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at fd700000 [disabled] [size=128K]
        Capabilities: [58] AGP version 3.0
        Capabilities: [50] Power Management version 2

0000:01:00.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200] (Secondary) (rev 01)
        Subsystem: PC Partner Limited: Unknown device 7c10
        Flags: bus master, 66MHz, medium devsel, latency 64
        Memory at c8000000 (32-bit, prefetchable) [size=128M]
        Memory at fd600000 (32-bit, non-prefetchable) [size=64K]

-ukh