I switched from the open source xserver-xorg-video-nouveau driver to nvidia-375 in the Additional Drivers tab of the Software & Updates application and was able to recover after locking my screen with Ctrl-Alt-L, which was locking up my mouse and keyboard before.
I switched from the open source xserver- xorg-video- nouveau driver to nvidia-375 in the Additional Drivers tab of the Software & Updates application and was able to recover after locking my screen with Ctrl-Alt-L, which was locking up my mouse and keyboard before.