Since kernel 4.10.x my desktop running Fedora 25 KDE can not log back in after lock screen activates. Most of the time the lock screen is totally unresponsive, other times I can enter a password and then X crashes completely and I can start a new session. This does not happen if i boot the last 4.9.x kernel which I have kept, but it happens on all 4.10.x kernels that have come out so far. I can switch to a console (ctrl alt F2) and log in. The graphics card is Nvidia but no third party drivers.