https://bugs.freedesktop.org/show_bug.cgi?id=91880
--- Comment #1 from Alex Deucher alexdeucher@gmail.com --- It's supported. Please attach your xorg log, dmesg output and a copy of your vbios. To get a copy of your vbios: (as root) (use lspci to get the bus id) cd /sys/bus/pci/devices/<pci bus id> echo 1 > rom cat rom > /tmp/vbios.rom echo 0 > rom