I'm running PCLinuxOS in VirtualBox for test purposes. I decided to see how smoothly the upgrade from KDE 3.5 to KDE 4 would go.
I got everything updated and installed as per Tex's instructions.
However, when I rebooted, at login, I'm shown a screen that says, "Welcome to Linux at Local host." On the left hand side are listed users' accounts and then some (admin, LP, root, etc.) and on the right side is the login area. I can click on my account, but I cannot enter a password. he keyboard does not respond. The mouse is captured and works and can highlight and click on accounts, , but the keyboard is dead.
Mouse and keyboard work fine when running Windows XP. They also worked when running KDE3.5.