I do have the AMD drivers installed. I did that bit last night when I installed Ubuntu. Good thought though....I had to double check to make sure I had done that.
Weird enough, now that I'm logged into the front end, I get this:
No device specified or device not found, use -d to specify one of the following
[0] Barts
[1] AMD Phenom(tm) II X6 1055T Processor
$
No idea what "Barts" is...but I'm going to try mining with it!
Edit: nope. Same "permission denied" error message. I wonder if I messed up some ownership somewhere...