Comment # 18 on bug 1200983 from Takashi Iwai

(In reply to Michael Hirmke from comment #17)
> All USB keyboards and mice are affected.

Do I understand correctly that, when you login via sddm, all USB keyboards and
mouses don't work, no matter how many keyboards / mouses are connected?
And, if you reconnect one of them, do they all start working?  Or it's only the
reconnected one?

> And yes, Iit is possible to access the machine via ssh.
> What exactly do you want me to check then?

At the moment you have no input control after SDDM login, login via ssh.  Then
get the dmesg output at first.  You can get the hwinfo output at this moment,
too.

Run evtest as root and check whether the corresponding input device appears
there, and test whether the input reacts.

If the input still doesn't work on the screen, reconnect.  And confirm that
it's working, then get the dmesg output and hwinfo output.