Hello, I found out that gdm works perfectly if I use the X.org autoconfiguration feature. I disabled xdebconfigurator and X.org automatically choose the right configuration. I also found out that kdm has a similar problem. If I start kdm instead of gdm I only get the background-image but no login-window. So I suggest that this is not a bug in gdm but some other package (maybe X.org?).
Cheers, Andreas -- Key fingerprint = F547 AB7E 8BF2 1399 DE2A 96CA 4BC2 476A EFEB 8C52
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