I have the exact same problem. It was working before, but some recent update must have broken something. Running Xorg, not wayland on 18.04. Screenshot goes through the motions, but nothing ends up in the clipboard buffer to paste.
I have the exact same problem. It was working before, but some recent update must have broken something. Running Xorg, not wayland on 18.04. Screenshot goes through the motions, but nothing ends up in the clipboard buffer to paste.