# Screen brightness breaks after sleep

**URL:** <https://forum.endeavouros.com/t/screen-brightness-breaks-after-sleep/79643>\
**Category:** Plasma\
**Created:** [May 13, 2026, 4:44pm UTC](https://forum.endeavouros.com/t/screen-brightness-breaks-after-sleep/79643 "2026-05-13T16:44:53Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![hornie](https://forum.endeavouros.com/letter_avatar_proxy/v4/letter/h/47e85d/32.png) [@hornie](https://forum.endeavouros.com/u/hornie)\
**Post date:** [May 13, 2026, 4:44pm UTC](https://forum.endeavouros.com/t/screen-brightness-breaks-after-sleep/79643/1 "2026-05-13T16:44:53Z")

</div>

So basically after hibernation or sleep or whatever screen brightness breaks on main screen, while 2nd screen is fine. But it fixes itself after like timeout when the system shuts off the screen. I tried poking around nvidia driver stuff, but nothing works. Also the scaling is messed up for some reason. Works in one app doesn’t in another. Upgraded from qt5 to qt6(not without issue, but whatever).

**Kernel** : Linux 6.18.29-1-lts  
**Display (LU28R55)**: 3840x2160 @ 1.79x in 29", 60 Hz [External] \*  
**Display (S275HL)**: 1920x1080 in 27", 60 Hz [External]  
**DE** : KDE Plasma 6.6.5  
**WM** : KWin (Wayland)  
**GPU** : NVIDIA GeForce RTX 3080 Lite Hash Rate [Discrete]