makes sense maybe I’ll spend a day on windows to double check as its been a while … tbh its been a like this since the beginning when I brought it but didnt think too much about the occasional flicker but the brightness thing is new
Have you tried reseating the eDP cable on the motherboard? This sounds like a hardware/cable connection issue to me. It’s known that some members of the community have had to reseat their eDP cable.
I can confirm to have the same issue with openSUSE Tumbleweed since about 3 weeks ago. At about 97%, the screen gets dimmer rather than brighter. If I load a very old kernel, it will work properly.
Edit: it looks like it will be fixed in Linux Kernel 7.1.9
I just upgraded today and yeah, the issue is now fixed for me. I don’t have a copy of Windows to test with right now so I don’t know why OP is getting the same issue with Windows but at least it’s all fixed in both openSUSE Tumbleweed and Fedora.
Thanks guys appreciate the feedback! I spent some time on windows 11 I don’t have any brightness issues and so far no screen tear/flicker issue. Although the screen tear/flicker is a bit trickier to detect for windows as it just randomly does it in Fedora, need to spend more time on windows to really see if its ok… I think the path forward is just updating the linux kernel, I have 7.1.8-200 and it judging from your responses 7.1.9-200 & 7.1.10-200 are working fine.
UPDATE: I upgraded it to 7.1.10 and its fixed my brightness issue. But going to have to wait on the screen tear/flicker I get randomly, only time will tell.