radeon driver is OK on single head, but has broken power management on multi-head. Hot, noisy and power hungry. Ironically, faster card---bigger problems :-) [1

radeon driver is OK on single head, but has broken power management on multi-head. Hot, noisy and power hungry. Ironically, faster card---bigger problems :-) [1]. Proprietary AMD driver used to have serious issues with gnome-shell, but sometime last year they finally got fixed. [1] https://bugs.freedesktop.org/show_bug.cgi?id=49981 https://bugs.freedesktop.org/show_bug.cgi?id=49981