Comment # 2 on bug 1023792 from Stefan Hundhammer

Not sure if there are any fresh logs when starting YaST is the problem...

Kurt,

can you try to start an individual YaST module manually? (i.e. not the YaST
control center which is a standalone plain Qt program)

e.g. (from a terminal window)

    su -
    xterm               # to make sure a simple X11 program can start
    yast2 sw_single     # the YaST2 software module

if not even "xterm" starts, you might have to do

    xhost +

(from your user account, not the root shell)

Does yast2 sw_single start? If yes, please try again with the YaST control
center. If that does not work, try calling it directly:

    /usr/lib/YaST2/bin/y2controlcenter

(both as root and as your normal user)