SDDM black login screen with mouse ponter

No, I only have the opensource drivers radeon and amdgpu. It looks like I’m using the previously-broken radeonsi driver now without mishap. Here is my inxi output.

inxi -Gxxz
Graphics:
Device-1: AMD Oland [Radeon HD 8570 / R5 430 OEM R7 240/340 Radeon 520 OEM]
vendor: Dell driver: radeon v: kernel arch: GCN-1 pcie: speed: 5 GT/s
lanes: 4 ports: active: DVI-I-1 empty: DP-1 bus-ID: 04:00.0
chip-ID: 1002:6611 temp: 35.0 C
Display: x11 server: X.Org v: 21.1.12 compositor: xfwm4 v: 4.18.0 driver:
X: loaded: modesetting unloaded: fbdev,vesa dri: radeonsi gpu: radeon
display-ID: :0.0 screens: 1
Screen-1: 0 s-res: 1920x1080 s-dpi: 96
Monitor-1: DVI-I-1 model: Dell S2409W res: 1920x1080 dpi: 92
diag: 609mm (24")
API: OpenGL v: 4.5 vendor: amd mesa v: 24.0.5 glx-v: 1.4 es-v: 3.2
direct-render: yes renderer: OLAND (radeonsi LLVM 18.1.4 DRM 2.50
6.8.7-1-default) device-ID: 1002:6611
API: Vulkan Message: No Vulkan data available.

Prior to the Mesa 24.0.5 update, I had exactly the same problem as OP, which I could fix by putting “modprobe.blacklist=radeon” in my grub configuration file. I could remove this option without any problem after the Mesa 24.0.5 update.