[Bug 291381] Random black screenlocker

[Thomas Lübking]

https://bugs.kde.org/show_bug.cgi?id=291381

--- Comment #9 from Thomas Lübking <thomas.luebking at gmail.com> ---
(In reply to comment #8)

> Ok, I do not understand much about OpenGL programming. Where the hack you
> are talking about is located? In kwin or in the screensavers?
*ggg* xscreensaver "modules" (eg. glmatrix) are traditionally called
"xscreensaver hacks" - sorry for confusion :-)

What basically happens (for that bug) is that the GL code in the screensaver
*assumes* there's some black background (w/o actually causing it) what is no
longer necessarily true for a composited desktop and esp. MSAA (multiscreen
sampling for antialiasing)

> I followed some of those discussions. Well, it seems there are people
> interested in using light-dm instead of kdm, how that would affect moving
> screenlocker to kdm?

you could not (easily) invoke the greeter as actual lock layer (and fancy
animations as optional, well... fancy animations)

> What about this approach to move it to ksmserver?
similar good protection against ctrl+alt+* but the (ksmserver) code is (i
think) more complex (at least doing a lot of unrelated stuff) and doesn't
actually handle logging in atm (think of other PAM stuff, eg. logging in by
touching some image points etc.) - in terms of security the actual login
handler seemed the far more natural location to me (but of course spellbinds
you to that DM)

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