dual monitor issue after f16 update

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http://forums.fedoraforum.org – Hi, i'm running F16 [3.6.6-1.fc16.x86_64 #1 SMP Mon Nov 5 16:56:43 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux] on a FSC laptop with an integrated video card [VGA compatible controller: Intel Corporation Mobile GM965/GL960] I've connected an iiyama ProLite monitor and the setup worked without a hitch until recently, when i got an automatic kernel update. The dual setup still worked except when i wasn't logged in. The bios output, the fedora splash screen all of that got displayed on the iiyama. but the logon window appears on the laptop screen only. after logging in the display switches (HowTos)