Happens for me sometimes too. Just some minutes ago when I right clicked on the network-manager icon the whole desktop froze more or less. I could move the mouse pointer some times but nothing was clickable. Could switch to tty1 but even that was super-slow recognizing keyboard inputs. Needed to strg+alt+2xbackspace to kill X. After that everything fine. Latest openSUSE Tumbleweed x64 on AMD APU A8 7600 Which logs do you need?