[Fedora 11+KDE] Login screen not responding to keyboard and mouse after update!

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http://forums.fedoraforum.org – Hi all. It's two days now I'm in deep troubles after my last "yum update". The system boots as usual, the graphical login pops up the normal way but no input is handled by either the internal keyboard (the system is a laptop), the mouse pad, the external USB mouse and keyboard. The hardware itself seems to be working as I can pop up the BIOS menus and even edit the GRUB booting line. But, after GRUB there's no possible input. I've tried to boot the system with the Fedora 11 DVD, rescue menu and then chroot. This in order to run a "yum update" in the hope that the problem was in some broken update. No chance: there's no update. My questions are: 1. Is there a way to boot Fedora withou any graphical interface from GRUB (or anything else to skip the KDE)? 2. Is there a way to have the (cabled) network activated at boot *before* the graphical login? 3. What the he** is happening to my otherwise pefectly working laptop? Thanks. (HowTos)