Comment 6 for bug 659509

I have found this lines in my daemon.log in the moment the login is unsuccessful. I paste them here in case they offer some help:

Dec 18 15:38:53 localhost gdm-session-worker[7214]: GLib-GObject-CRITICAL: g_value_get_boolean: assertion `G_VALUE_HOLDS_BOOLEAN (value)' failed
Dec 18 15:39:01 localhost gdm-session-worker[7214]: pam_sm_authenticate: Called
Dec 18 15:39:01 localhost gdm-session-worker[7214]: pam_sm_authenticate: username = [shankao]
Dec 18 15:39:01 localhost gdm-session-worker[7214]: pam_sm_authenticate: /home/shankao is already mounted
Dec 18 15:39:05 localhost gdm-simple-slave[7319]: WARNING: Unable to load file '/etc/gdm/custom.conf': No such file or directory
Dec 18 15:39:05 localhost acpid: client 7159[0:0] has disconnected
Dec 18 15:39:05 localhost acpid: client connected from 7321[0:0]
Dec 18 15:39:05 localhost acpid: 1 client rule loaded