Comment # 73 on bug 1222156 from Togan Muftuoglu

I can confirm also under X11 I don't need to force amdgpu. Didn't try wayland
as I am not using it 

System:
Kernel: 6.8.7-1-default arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
clocksource: tsc avail: hpet,acpi_pm
parameters: BOOT_IMAGE=/boot/vmlinuz-6.8.7-1-default
root=UUID=f5f5c2e6-78db-42c1-af58-d73dc71f58ef splash=silent
resume=/dev/disk/by-uuid/9400120e-afe4-47a1-b9e7-583e36c49aef quiet
security=apparmor mitigations=auto
Desktop: KDE Plasma v: 6.0.4 tk: Qt v: N/A info: frameworks v: 6.1.0
wm: kwin_x11 with: krunner tools: avail: xscreensaver vt: 2 dm: SDDM
Distro: openSUSE Tumbleweed 20240429
Graphics:
Device-1: AMD Tahiti PRO [Radeon HD 7950/8950 OEM / R9 280] vendor: ASUSTeK
driver: radeon v: kernel alternate: amdgpu arch: GCN-1
code: Southern Islands process: TSMC 28nm built: 2011-20 pcie: gen: 3
speed: 8 GT/s lanes: 8 link-max: lanes: 16 ports: active: DP-1,HDMI-A-1
empty: DVI-D-1,DVI-I-1 bus-ID: 01:00.0 chip-ID: 1002:679a class-ID: 0300
temp: 53.0 C
Display: x11 server: X.Org v: 21.1.12 with: Xwayland v: 23.2.6
compositor: kwin_x11 driver: X: loaded: radeon
unloaded: fbdev,modesetting,vesa dri: radeonsi gpu: radeon display-ID: :0
screens: 1
Screen-1: 0 s-res: 3840x1200 s-dpi: 96 s-size: 1016x317mm (40.00x12.48")
s-diag: 1064mm (41.9")
Monitor-1: DP-1 mapped: DisplayPort-0 pos: primary,left
model: EIZO NANAO CX241 serial: <filter> built: 2014 res: 1920x1200 hz: 60
dpi: 94 gamma: 1.2 size: 519x324mm (20.43x12.76") diag: 616mm (24.2")
ratio: 16:10 modes: max: 1920x1200 min: 720x400
Monitor-2: HDMI-A-1 mapped: HDMI-0 pos: right model: Idek Iiyama PL2292H
serial: <filter> built: 2019 res: 1920x1080 hz: 60 dpi: 102 gamma: 1.2
size: 476x268mm (18.74x10.55") diag: 546mm (21.5") ratio: 16:9 modes:
max: 1920x1080 min: 720x400
API: EGL v: 1.5 hw: drv: amd radeonsi platforms: device: 0 drv: radeonsi
device: 1 drv: swrast gbm: drv: kms_swrast surfaceless: drv: radeonsi x11:
drv: radeonsi inactive: wayland
API: OpenGL v: 4.5 vendor: amd mesa v: 24.0.5 glx-v: 1.4
direct-render: yes renderer: TAHITI (radeonsi LLVM 18.1.4 DRM 2.50
6.8.7-1-default) device-ID: 1002:679a memory: 2.93 GiB unified: no
API: Vulkan Message: No Vulkan data available.