Same problem here. Fullscreen doesn't work in X11 output mode and video "flickers in OpenGL output mode. It looks like if anything is moving (i.e. you receive and IM, a webpage refreshes, or even the bar moving across the gmplayer box) it makes the video flicker in that location. I have found that minimizing all windows makes the video much smoother. However, it is very difficult to read the right click menu due to the video trying to cover the menu.
I have also found another bug report that appears similar https://bugs.launchpad.net/ubuntu/+source/mplayer/+bug/71502 -- gmplayer doesn't change video size when switched to fullscreen https://bugs.launchpad.net/bugs/110183 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs