Fdora 16 beta log me out random

[Zhang Di]

Hello everyone,
     Now I am using F16 beta version, after today's update, I was random 
logged out just after I logged in.
     My computer is Lenovo's Thinkpad T420, when I changed the display 
to integrated graphic(intel), it can not work even in fall-back model. I 
only can work with the nVidia graphic card, but the nouveau driver 
doesn't work on it.
     I don't know what's the matter, I search the fedoraforum, someone 
has the same problem with me.
http://forums.fedoraforum.org/showthread.php?t=271191<http://forums.fedoraforum.org/showthread.php?t=271148>
http://forums.fedoraforum.org/showthread.php?t=271148

     I love fedora very much, can anyone give me some help!

Thank you!

silentdi
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