xorg intel: binding of gart memory failed

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello,
on a i386 system with the last autobuild netbsd-6 GENERIC kernel and:
vga1 at pci0 dev 2 function 0: vendor 0x8086 product 0x2772 (rev. 0x02)
wsdisplay0 at vga1 kbdmux 1: console (80x25, vt100 emulation)
wsmux1: connecting to wsdisplay0
i915drm0 at vga1: Intel i945G
i915drm0: AGP at 0xe0000000 256MB
i915drm0: Initialized i915 1.6.0 20080730


the X server doesn't start because of:
[    35.097] (II) intel(0): [DRI] installation complete
[    35.097] (WW) intel(0): drmDropMaster failed: Unknown error: 4294967295
[    35.422] (II) intel(0): xf86BindGARTMemory: bind key 0 at 0x007bf000 (pgoffs
et 1983)
[    35.422] (II) intel(0): xf86BindGARTMemory: bind key 1 at 0x0082a000 (pgoffs
et 2090)
[    35.422] (II) intel(0): xf86BindGARTMemory: bind key 2 at 0x01000000 (pgoffs
et 4096)
[    35.424] (II) intel(0): xf86BindGARTMemory: bind key 3 at 0x02000000 
(pgoffset 8192)
[    35.430] (II) intel(0): xf86BindGARTMemory: bind key 4 at 0x05000000 
(pgoffset 20480)
[    35.432] (II) intel(0): xf86BindGARTMemory: bind key 5 at 0x06000000 
(pgoffset 24576)
[    35.434] (II) intel(0): xf86BindGARTMemory: bind key 6 at 0x07000000 
(pgoffset 28672)
[    35.435] (WW) intel(0): xf86BindGARTMemory: binding of gart memory with key 
6 at offset 0x7000000 failed (Invalid argument)
[    35.435] 
Fatal server error:
[    35.435] Couldn't bind memory for classic textures
[    35.435] 

Option     "DRI" "off"
in xorg.conf makes it work, but it would be nice to have DRI enabled.
Any idea ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--