https://bugs.freedesktop.org/show_bug.cgi?id=105046
--- Comment #7 from Michael Zapf forums18@mizapf.de --- Is there at least some way to restore the real monitor resolution without killing the Xserver (and hence all running desktop applications)?
Right now I either have to reboot, or I must turn off the monitor, then kill the Xserver (ctrl-alt-bs), then turn on the monitor again. It does not even suffice to kill the Xserver alone.