Nvidia drivers

[James Allsopp <jamesaallsopp@googlemail.com>]

Hi,
Having a terrible time trying to get nvidia drivers working. I had them
working ages ago but an update broke them whilst I was trying to get
CUDA to work.

I'm trying to do this properly the nvidia way, and have tried to remove
all of the packages using apt, and them used
m-a prepare
m-a auto-install nvidia

and everything went to plan, but when I reboot X fails saying it can't
find the modules.

ja@Hawaiian:~$ uname -a
Linux Hawaiian 2.6.30-2-amd64 #1 SMP Mon Dec 7 05:21:45 UTC 2009 x86_64
GNU/Linux

Hawaiian:/home/ja# find / -iname 'nvidia.ko'
/lib/modules/2.6.30-2-amd64/nvidia/nvidia.ko
/lib/modules/2.6.30-2-amd64/kernel/drivers/video/nvidia.ko

lsmod shows an nvidia module
Hawaiian:/home/ja# lsmod | grep nvidia
nvidia              10852808  0
i2c_core               25424  2 i2c_i801,nvidia

But it doesn't seem the same size as the other two, which are different
from each other.
Hawaiian:/home/ja# ls -l /lib/modules/2.6.30-2-amd64/nvidia/nvidia.ko
-rw-r--r-- 1 root root 13294487 Sep 12 12:40
/lib/modules/2.6.30-2-amd64/nvidia/nvidia.ko

Hawaiian:/home/ja# ls -l
/lib/modules/2.6.30-2-amd64/kernel/drivers/video/nvidia.ko
-rw-r--r-- 1 root root 11670161 Jan 12  2010
/lib/modules/2.6.30-2-amd64/kernel/drivers/video/nvidia.ko

Not exactly sure where to go from here, any advice or requests for more
information gratefully received.

Thanks,
James