i have the same problem... take a look here : Nov 10 02:17:34 l-laptop kdm_greet[5196]: Can't open default user face Nov 10 02:17:41 l-laptop kdm_greet[5196]: Internal error: memory corruption detected i use the Kubuntu 6.10 (Edgy) what can i do? -- KDM detected memory corruption https://launchpad.net/bugs/47455