FC6 freezing at bootup

[Gilboa Davara]

On Sat, 2006-11-04 at 22:33 -0400, Felipe Nunez wrote:
>  Hi :
>     I recently upgraded to FC6 and I'm very pleased with it, but I've got a 
> big trouble.
>  Every other bootup with the new kernel /boot/vmlinuz-2.6.18-1.2798.fc6xen the 
> system
>  freezes during this boot process.
> 
>   The las two messages I get are:
>        loading uhci-hcd.ko  module
>        USB Universal Host Controller Interface driver v3.0
> 
>   So, what can I do to safely boot FC6 ?
>   
> 
>    Felipe Nunez
> 

Does the non-Xen kernel boot OK?
Can you connect a serial console [1] and see if the kernel spews out any
death/OOPS/BUG messages?

- Gilboa
[1] http://tldp.org/HOWTO/Remote-Serial-Console-HOWTO/