Hi, I had the same issue recently. Check in /var/log/kdm.log. I had an entry like Error: Can not create directory "/var/tmp/kdecache-..." /var/tmp was simply not there. I added it with sudo mkdir /var/tmp sudo chmod 777 /var/tmp sudo chmod o+t /var/tmp (not sure if the last step is necessary, but /var/log has it as well) After that it worked fine. Regards Peter