When locking screen and kdm package is missing the input events (mouse click, keyboard) are disabled and there is no way to recover from that except of killing X. I tried to install kscreensaver, kdepassword without kdm and still same behaviour. I start kde using startx without any display manager. Any hints?
I Had the same problem, don't know exactly how to reproduce it yet. It happened after I enabled both my internal and discrete GPU (Lenovo W530 with optimus) on a two screen setup (only way to have a tri-head setup with optimus enabled) and my screen locked automaticly. When I typed no nothing seemed to happen, but when I pressed caps-lock I did get a notification. I have this problem after upgrading from kde 4.9.5 to kde 4.10.1.
Is this bug #463176 ?
(In reply to comment #2) > Is this bug #463176 ? No. I am experiencing that one as well... on unlock focus is not returned to the last focused window. But without kdm, even the password prompt is not appearing and input is disabled.
Please test with current stable KDE SC 4.11.2