Comment # 1 on bug 1184072 from Yifan Jiang

Hi Andreas,

Thanks for reporting, to gather the log, please set Enable=True in the [debug]
section of /etc/gdm/custom.conf and reboot.

After reboot, reproduce the issue, then attach the supportconfig (in
supportutils package) tarball.

Finally, if there is a relevant coredump file (eg. gnome-shell, gdm etc.),
would you also possibly attach it please.