OK, if you have successfully downgraded mutter then it looks like this problem existed before the introduction of xrandr-scaling. So that's good. But just to verify, please run:
dpkg -l | grep mutter
And send us the output.
OK, if you have successfully downgraded mutter then it looks like this problem existed before the introduction of xrandr-scaling. So that's good. But just to verify, please run:
dpkg -l | grep mutter
And send us the output.