https://bugs.kde.org/show_bug.cgi?id=406164
--- Comment #1 from Holger ---
A few more issues to think about in a broader view on accessibility of
lock-screens:
- control speaker volume works (obviously needed feature for the non-impaired)
- control screen brightness also works
- both have dedicated keys on my keyboard (independent of keyboard layout /
language / user-assigned shortcut)
- so far I haven't seen dedicated keys for inversion/contrast/color
rotation/magnification/reading texts aloud/...
- multiple users might assign non-standard shortcuts
Therefore, at the moment, I don't see a universal solution, where everybody can
control the effects to his liking with his custom shortcuts in his favorite
keyboard layout. But, it might be enough to install specifically designed
lock-screen layouts, that optimally support this limited situation of providing
credentials. In case, the computer is shared between multiple diffenrent users
(e.g. a school), a fool-proof standard-way to cycle the designs must be
available.
The existing effects are more general but at the same time a choice of the
individual and could be restricted inside that one unlocked session, currently
occupying the screen. So engaging the lockscreen should undo those effects,
while entering the session should reenable the last effect-combination (no only
on unlock, but also at login).
E.g. mouse traces already somewhat respect the lockscreen (the overlay is
hidden below the lockscreen and resumes on unlock). On the other hand, I can
"draw" new traces while in lockscreen, that only become visible after login.
Moreover the "highlight mouse cursor" works on top of the lock-screen, although
it uses my personal shortcut-mapping - strange ... Also the custom selected
mouse-cursor-theme shines through onto the lockscreen.
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