https://bugs.freedesktop.org/show_bug.cgi?id=45291
--- Comment #4 from Glen Ogilvie nelg@linuxsolutions.co.nz --- Also occurs on a Dell Studio 1747 with an Mobility Radoen HD 4650.
Anything I can do to help? No errors in the logs. Monitor is detected, correct resolutions found. I can tell it to extend the desktop it.. but no output on the monitor.. it stays sleeping.
Works OK on the ATI legacy driver.. but I want to upgrade from a 4 year old distro.