fedora 17 black screen after update to kernel

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http://forums.fedoraforum.org – Hi all, all happy using Fedora 17 till the last update that installed kernel my ATI card stop working giving me a black screen after boot i can listening to the start up sound of KDE but no image. tteliteAnyone as the same issue? Running Laptop Toshiba Satellite L755D-128 AMD A4 dual core with ATI HD6xxx series Thank in advance (HowTos)