Along the same lines....
I've been trying to upgrade my kernel (2.4.7-10 -> 2.4.9-31, via RPM), and when I do so my video doesn't work.
I'm using an NVIDIA card, which requires a little fiddling anyway.
I removed the NVIDIA rpm's, then tried to reinstall them... when doing so, it complains that modprobe can't find the NVidia module.
It lives in:
...and doesn't exist in:
Why doesn't the rpm install the driver in the new modules tree?