@Andrew Cruz I have the same issue. You can kill the process by going to the command line interface typing Ctrl+Alt+F3. First type your username and then your password. Use ps ax | grep font to find the PID of the gnome-viewer currently opened window and then kill it using kill PID.
@Andrew Cruz I have the same issue. You can kill the process by going to the command line interface typing Ctrl+Alt+F3. First type your username and then your password. Use ps ax | grep font to find the PID of the gnome-viewer currently opened window and then kill it using kill PID.