Taking a tip from https://bugs.freedesktop.org/show_bug.cgi?id=58382, I tried suspending using "pm-suspend --quirk-test --quirk-s3-mode" and this works for me too. Using this, the display *does* get re-enabled on resume.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1010683 Title: ATI Resume from Suspend leads into black screen (VGA_Switcheroo) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1010683/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs