call to inusertemp failed

[queen]

I started today to have problems when login into kde. I passed the login screen but then the spalsh got stalled. I tried various things, including removing .kde4. In kdm.log I have some errors about dbus, but dbus is started and is at default run level. Other errors in kdm.log kdeinit4:Communication error with launcher. Exiting. I still get the error Call to inusertemp failed (temporary directories is full?) Check your installation. I checked /tmp and it's not full. I still have 8gb free in /.

I don't know what else to do. I even emerged again krunner.