I have two graphics cards listed below (2.4.20-pre5 /proc/pci).
With both framebuffers enabled...
CONFIG_FB_RIVA
CONFIG_FB_ATY
CONFIG_FB_ATY_CT
...the kernel freezes after printing the ATY messages.
With FB_RIVA enabled, and ATY disabled, the framebuffer works.
I've experienced the same problem on earlier 2.4 kernels.
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Bus 0, device 10, function 0:
VGA compatible controller: ATI Technologies Inc 3D Rage Pro 215GP (rev
92).
IRQ 9.
Master Capable. Latency=32. Min Gnt=8.
Prefetchable 32 bit memory at 0xde000000 [0xdeffffff].
I/O at 0xdc00 [0xdcff].
Non-prefetchable 32 bit memory at 0xe0000000 [0xe0000fff].
Bus 1, device 0, function 0:
VGA compatible controller: nVidia Corporation NV20 [GeForce3 Ti200] (rev
163 ).
IRQ 5.
Master Capable. Latency=248. Min Gnt=5.Max Lat=1.
Non-prefetchable 32 bit memory at 0xdc000000 [0xdcffffff].
Prefetchable 32 bit memory at 0xd4000000 [0xd7ffffff].
Prefetchable 32 bit memory at 0xd8000000 [0xd807ffff].