Blinking cursor after reboot with Preupgrade

[Terry Polzin]

On Tue, 2011-07-05 at 13:35 -0500, Richard Shaw wrote:
> Since I know I don't have enough ram to do a fresh install I'm trying
> to upgrade my old EEEPC 701 from F13 to F15 via Preupgrade. I ran
> preupgrade-cli from runlevel 3 to maximize the amount of ram available
> at everything appears to run fine prior to the reboot.
> 
> When I try to run the upgrade from GRUB upon reboot nothing happens. I
> just get a blinking cursor in the upper left and it sits with no disk
> activity.
> 
> Choosing the previous Kernel from GRUB and it boots up fine to F13.
> 
> Any ideas?
> 
> Thanks,
> Richard

What are the kernel versions involved?