I have forgotten my user password and cannot get past the logon screen. Is there a way to recover beside reinstalling Ubuntu Studio from scratch? (I am new to Ubuntu Studio).

You can find instructions here: http://www.linuxclues.com/articles/11.htm

Hello,
This procedure is all nice, but how do I get to the command prompt from the logon screen (popup)?
I have just upgraded to Ubuntu Studio 11.04 from 10.10. and now cannot get passed the logon popup window.

Hello,

Just as long as you remember your root password, you can use the passwd <username> method. Control + Alt + F[1-6] will bring you to a terminal.

Cheers,

Josh

Ubuntu usually has a locked root account with unknown password. So if that is the case you need a live CD and

1. boot from it
2. go to your HD (mount it if necessary)
3. edit the file /etc/passwd and remove the first x on the line containing your username

Below an excerpt of the file on one of my systems (slackware)
The entries contain a number of fields seperated by colons (':'). The first field contains the username and the second field is the password field.
The first line has a user (teboho) with a password; you can see this from the x following the name. Removing the x will remove the password and will result in a line like the second one. The password will be empty.

Note:
this assumes that your system uses shadow passwords (standard setups do). If it does not, the x will actually be a longer piece of text; just remove it.