Created attachment 45237 [details]
For reference, here's a screenie

I'll check it

Marcus this is a bug in YaST2.call script:

--- cut ---
if [ $server_running = 1 ];then
        sleep 1 && kill $xserver_pid
        while kill -0 $xserver_pid 2>/dev/null ; do
                sleep 1
        done
fi
--- cut ---

it seems that the $server_running variable is undefined (empty) and bash cannot
handle that.

Debugging Example:
--- y2call.sh ---
#!/bin/bash

if [ $server_running = 1 ];then
    echo "1"
fi
--- y2call.sh ---

produces --> ./y2call.sh: line 3: [: =: unary operator expected

Solution (quoting):
--- y2call.sh ---
server_running=1

if [ "$server_running" = "1" ];then
    echo "1"
fi
--- y2call.sh ---

produces --> ./y2call.sh
1

And works also with the undefined $server_running variable too

has been fixed yesterday  

*** This bug has been marked as a duplicate of 100729 ***

Rule of thumb: put "" around every var.