Après investigations, c'est l'AGP qui ne se met pas
en route:
(II) R128(0): [drm] created "r128" driver at busid
"PCI:1:0:0"
(II) R128(0): [drm] added 8192 byte SAREA at
0xe0d11000
(II) R128(0): [drm] mapped SAREA 0xe0d11000 to
0x411ef000
(II) R128(0): [drm] framebuffer handle = 0xf8000000
(II) R128(0): [drm] added 1 reserved context for
kernel
(WW) R128(0): [agp] AGP not available
(WW) R128(0): [agp] AGP failed to initialize --
falling back to PCI
mode.(WW) R128(0): [agp] Make sure you have the
agpgart kernel module
loaded.