Same problem here, before using the tool I had a screen resolution of 1280x800 and a British keyboard layout. After I had 1024x768 and Us layout. I wasn't able to change the screen resolution from the Preferrences, I had to edit the xorg.conf manually.
-- Restricted Driver manager changes keyboard layout and screen resolution https://launchpad.net/bugs/94549 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
