Comment 7 for bug 808478

What solved my problem,
was reading /usr/share/doc/xserver-xorg/howto/configure-input.txt.gz
and running
udevadm trigger --subsystem-match=input --action=change
as described in this doc.
(this I did in remote ssh session from another computer to my laptop)
However I don't understand why such action is needed now.
Earlier, kbd&mouse worked well in X without that.
This could be a bug in updated udev or initramfs scripts.