Running Ubuntu 12.04.2 and this behaviour just started after latest kernel update. Per suggestion from Eduards, putting Chromium in full screen mode (F11), followed by locking the desktop and unlocking it, solved any future desktop locks regardless of what software you have active.
Running Ubuntu 12.04.2 and this behaviour just started after latest kernel update. Per suggestion from Eduards, putting Chromium in full screen mode (F11), followed by locking the desktop and unlocking it, solved any future desktop locks regardless of what software you have active.
Very odd indeed, but it works!