mrtoth/kde-lockscreen-suspend-display
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Hybernates your display after entering the lockscreen on KDE.
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Kristóf Tóth bae3b95b6c Improve cleanup logic (handle singals gracefully) and use config magic
2021-10-16 22:39:47 +02:00
afterlock Explain keypress sleep debouncing in hybernateDisplayLoop 2020-09-08 16:14:34 +02:00
cmd/after-lock Improve cleanup logic (handle singals gracefully) and use config magic 2021-10-16 22:39:47 +02:00
config Add poc to parse config from env. Should refactor (famous last words) 2021-10-16 22:39:47 +02:00
lockfile Rename package 2020-09-08 16:32:55 +02:00
xdg Add some hacky PoC XLib/XInput C code to fetch slave device nodes 2021-10-16 22:39:45 +02:00
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proof-of-concept.sh Initial commit. Add poc hack script 2020-08-17 12:28:52 +02:00
README.md Rename package 2020-09-08 16:32:55 +02:00

README.md

KDE Lockscreen Suspend Display (KDE LSD)

What?

KDE Plasma (as of 5.19.4) lacks the funcionality of hybernating your display after locking your computer.

This hack implements Gnome-like lockscreen behaviour: it hybernates your display after a given timeout if the computer is locked. It also makes sure that the display won't turn off while you are typing your password to unlock your machine.

How?

This whole started as a simple bash script (proof-of-concept.sh) using qdbus and xset to implement this functionality. However, it had an annoying defect: the screen would hybernate after the timeout no matter what (i.e. the display could turn off while you were typing your password to unlock the machine). To remedy this defect I've decided to monitor keypresses via /dev/input and rewrite the whole thing in golang to provide proper debouncing (i.e. the timeout resets if you start typing).

Beware this is a quick&dirty hack. Instead of calling qdbus and xset from golang, proper dbus bindings should be used. Instead of registering a go binary to execute once the lockscreen is active (System Settings -> Notifications -> Application Settings -> Screen Saver), the whole thing should probably be rewritten in C++ and contributed to KDE.