Comment 4 for bug 46193

It's not thta long ago that I reinstalled my entire system. I installed from the Kubuntu Flight 4 CD, and dist-upgraded from there.

I tried to reinstall gdm (apt-get --purge remove gdm; apt-get install gdm), but that doensn't help.
Seems like this is not in gdm at all, but perhaps gdm is started to soon in the startup process.
If I login to tty1 and restart gdm from there, everithing works fine.

I had a similar problem before, when my NFS filesystems could not be mounted and my NIS client couldn't connect to the server, because the startup scripts were started before I got an IP address from de DHCP server.