So I installed Tumbleweed KDE using an ISO image: openSUSE Tumbleweed KDE LiveCD.
Operating System: openSUSE Tumbleweed 20260616
KDE Plasma Version: 6.6.5
KDE Frameworks Version: 6.27.0
Qt Version: 6.11.1
Kernel Version: 7.0.12-1-default (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800H with Radeon Graphics
Memory: 16 GiB of RAM (15.5 GiB usable)
Graphics Processor: NVIDIA GeForce RTX 3070 Laptop GPU
Manufacturer: LENOVO
Product Name: 82JU
System Version: Legion 5 15ACH6H
I installed this ISO with my laptop in ‘dynamic mode’, which basically allows me to use integrated AMD graphics, which I always do with my linux installs to ease the installation of a distro.
All good, it installs, then I go ahead into YaST (first time, never used this tool before). When going into Software Management, a selection of NVIDIA packages is selected for me. This is not mentioned in the docs, but I thought it was good. Rebooted laptop into ‘discrete mode’ (a.k.a nvidia only).
It turns out that the suggested packages for my card NVIDIA GeForce RTX 3070 Mobile is not good, because it selects nvidia-glG06 and that misses functionality for my laptop display brightness and after reboot somehow by wallpaper was reset. It also installed mokutils, which although I have used before, I did not expect to have to go through that and didn’t know what to press (though I saw the userdocs were still WIP for that, so I’m guessing that a step-by-step tutorial on mokutil enrolling is already in the works). I don’t care much for secureboot so I removed mokutils package and turned off secure boot.
After some troubleshooting, and knowing that my Debian install used way higher nvidia-driver versions (610), I decided to try a higher nvidia-driver version and removed all nvidia packages except firmware. Then I installed glG07 which was not mentioned in the docs, specifically:
sudo zypper install nvidia-open-driver-G07-signed-kmp-meta
Now everything works exactly like on my Debian install, display brightness working and external displays working great again.
PS:
I also tried this:
sudo zypper install-new-recommends --repo https://download.nvidia.com/opensuse/tumbleweed
It was mentioned as a CLI installation option in the docs, but that installed G06 as well, which got me the same problem again with my display brightness. So G07 is the way.