SUMMARY There are to ways to change the brightness of the screen: Fn + brightness keys or the energy plasmoid. For the first case it goes in steps of 5%: 100%, 95% ... 10% 5% OFF The plasmoid's slider however is more fine graded and has a significant difference: 0% does not turn off the screen but dims it to the lowest level or to a level which is way below the 5%, which makes it very pleasant for the eyes in the night. Turning off the screen is not possible here, though. I'd like to propose to add an extra step for the "Fn + Brightness key" solution: 5% __0%__ OFF. SOFTWARE/OS VERSIONS Operating System: Manjaro Linux KDE Plasma Version: 5.20.4 KDE Frameworks Version: 5.76.0 Qt Version: 5.15.2 Kernel Version: 5.9.11-3-MANJARO OS Type: 64-bit Processors: 4 × Intel® Core™ i7-7500U CPU @ 2.70GHz Memory: 15.4 GiB of RAM Graphics Processor: Mesa Intel® HD Graphics 620
I can confirm this. Display shouldn't just turn blank. It can be like this, 5% then 1% then blank.
It's true: setting the slider to 0% doesn't turn off the backlight the way going down to 0% using the keyboard actions does.
Testing right now, the Fn keys and the plasmoid have the same behavior: neither of them can turn off the screen.
I've tested in Plasma 5.27.4 on Wayland and neither does seem to actually turn off the screen With the slider I got to 1% while dragging and 0% only with arrow key; instead with Fn + brightness keys I got to 0%; but in all the cases I could still see the content even if very faintly. KDE Plasma 5.27.4 KDE frameworks Version: 5.105.0 Qt Version: 5.15.9 Kernel Version: 6.2.11-arch1-1 (64 bit) Graphics Platform: Wayland
*** Bug 445529 has been marked as a duplicate of this bug. ***
Fixed with https://invent.kde.org/plasma/powerdevil/-/merge_requests/184; now the decrease key will no longer turn the screen off and instad cap it at the same minimum brightness as the slider in the battery applet already does.
*** Bug 467910 has been marked as a duplicate of this bug. ***
*** Bug 403125 has been marked as a duplicate of this bug. ***
Git commit 6ca6308ccd2f3266f20f84af6658fa97547e12ee by Jakob Petsovits. Committed on 18/07/2024 at 07:13. Pushed by jpetso into branch 'master'. wayland: Use brightness range 1..max for internal displays This avoids regressing compared to PowerDevil in 6.1 which also protected against setting internal display brightness to 0. Related: bug 483490 M +2 -1 src/wayland/externalbrightness_v1.cpp https://invent.kde.org/plasma/kwin/-/commit/6ca6308ccd2f3266f20f84af6658fa97547e12ee