Doing some more testing with the final version of Ubuntu 13.04, I can say that this bug is not longer present. I can successfully switch to the dedicated GPU as I did on Ubuntu 12.10. However, after switching backlight is off and can't be turned on, as stated in bug Bug #1163418.
** Changed in: linux (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1162526 Title: vgaswitcheroo - Can't switch to dedicated GPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1162526/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs