Dieter Ries wrote:
> 
> The problem I encountered was, that when I tried to start X with 8776, I got 
> the following error message:
> 
> API mismatch: the NVIDIA kernel module has the version 1.0.9629 but this X 
> module has the version 1.0-8776. Please make sure that the kernel module and 
> all NVIDIA driver components have the same Version.
> 
> And this even occurred after emerge -C nvidia-drivers etc. Now I got it back 
> working with uninstalling the NVIDIA.<bla>.run package manually, and then 
> unmerging nvidia-drivers, and remerging nvidia-drivers. So it seems that this 
> BETA driver from NVIDIA behaves different from the former versions. 

Did you unload the nvidia kernel module after uninstalling the 9629
drivers? This one stays loaded until you either reboot or do a "rmmod
nvidia".

The morale of the story: If you have an error message and want help,
post the exact error message, not some summary what you think it says ;)