Cannot login after screen lock

[Thierry de Coulon]

On Wednesday 04 May 2011 09:21:50 pm Keyur Desai wrote:
> Hello Experts,
>
> Have been using Ubuntu for sometime and I am not sure what changed but
> everytime I lock the PC it never allows me to login again.
>
> I decided to do an upgrade now to Ubuntu 9.04. Ever since I did that it
> would go straight to login screen and not allow me to login.
>
> Using Cntrl + ALt + F1 I could get to the cli. But not sure what to do from
> there to fix this.
>
> Thanks
> Keyur Desai

I'm not an expert, especialy if you are using Gnome, but you should describe a 
little better "how" it does not let you login again.

I don't know much about locking, but could it be that your user requires 
special permissions?

_If_ it means your user password is not accepted, then when you get to the 
CLI, can you then login?

If yes, I in your case would first enable the root account, login as root, try 
to change the user's password and see if it works.

if not, I would edit /etc/shadow to remove the password, login and set a 
password again.

Hope this helps,

Thierry