QXL Driver xf86-video-qxl 0.1.5-7 changes xrandr output names
On arch linux, installing the latest qxl driver with the latest community/xf86-video-qxl (0.1.5-7 at time of writing) changes qxl xrandr outputs to use output naming scheme:
qxl-0
qxl-1
qxl-n
These output names are currently unsupported in agent/device-info.c and cause the warning: Couldn't find an XRandr output for the specified device
followed by xorg-server core dump and occasional guest kernel panic.
Edited by branflakes2