Teoh Han Hui, please select Xfce Session in gdm login and try it again. If that solves the problem then it will confirm that for some reason the default session in gdm is not calling startxfce4, as I said before.
-- xfce4-panel lock screen button not working https://bugs.launchpad.net/bugs/200665 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs