Had the same problem and could solve it by changing a VRAM setting in the BIOS: [RESPONDED] AMD Ryzen 7040 (7840U) - Arch Linux amdgpu errors, blank screen on opening Steam - #12 by Remy_Garrigue
Had the same problem and could solve it by changing a VRAM setting in the BIOS: [RESPONDED] AMD Ryzen 7040 (7840U) - Arch Linux amdgpu errors, blank screen on opening Steam - #12 by Remy_Garrigue