Discovery complained about not finding Bus but I got the others. I replaced <driver> with 'radeon' for xresprobe.
** Attachment added: "uname.txt" http://launchpadlibrarian.net/18540780/uname.txt -- Regression - C640 Brightness cannot be changed while X is active https://bugs.launchpad.net/bugs/283364 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs