failed online update 12.10 to 13.04 black screen

[O. Sinclair]

On 29/05/2013 05:36, Uriah Heep wrote:
> I have a basic Lenovo G580 laptop with and Intel I5 running at 2.5 GHz
> and except for adding a second four gig stick of memory I have not
> modified it.  Video is handled by the I5.  Of course, Windows 8 was
> installed though I would rather not have to pay for it.  I installed
> Kubuntu 12.10 in a dual boot configuration and have been using it for
> three months without issue.  I then did an online upgrade to Kubuntu
> 13.04.  I rebooted the password screen came up, I entered my password
> hit enter, and now have a black screen with the exception of the mouse
> cursor.  When experimenting hitting the print screen button brought up
> the screen capture program.  From there I was able to get into Firefox
> on exiting Firefox I was again confronted with a black screen.  After
> invoking screen copy again, I was able to get printscreen to show other
> areas such as root, grub, etc.
>
> Would anyone be able to suggest a way I could get my regular home screen
> back?
>
>
try pressing ctrl+alt+F2 or F3 and see if you get a login prompt. If so, 
logon with normal username/password. Then run command startx and see 
what output you get