Log-in screen gone mission in Ubuntu 11.04

[Colin Law]

On 10 December 2011 16:38, Davis Thomas <davisth48 at gmail.com> wrote:
> Hi all,
>
> On logging out from a session on Ubuntu 11.04 (gnome) I get a blank screen
> instead of the log-in prompt. So, I'm not able to log-in again and end up
> forcefully restarting the machine using power button. On regular booting the
> log-in prompt is appearing properly. This issue seems to be happening just
> after an upgrade.
>
> Even ctrl+alt+F1 does not give any log-in prompt on CLI.
>
> Anyone aware of the packages needed for displaying the log-in prompt? I
> already tried re-installing gdm.

It sounds more serious than that.  Have you had a look in syslog (use
the Log File Viewer) to see if there are any rude messages when you
logout.  Also look in ~/.xsession-errors (have a look there before
logging out first to see what is at the end of it so you will know
what has been added, if anything, as it tends to be full of warnings).

Colin