I have attached a bug report log, which also shows my various attempts to hack around the problem (different = kernel parameters, using a self-built 5.12 kernel in the hopes nouveau would work sufficiently etc.), but the currently running config should be sane (distro kernel, no special kernel parameters).
FWIW, brightness control is working when using the iGPU (using amdgpu driver) instead of the dGPU, but in that case the external monitor doesn’t work because the nvidia driver can’t be used as output sink for amdgpu. This is the case for both the 460.67 and 465.24 drivers. In the past week I have noticed they no longer do anything when I try to adjust my brightness, however my Fn key still works for volume or anything else.
I am using Fedora 33 on a Legion 5 Pro laptop featuring a RTX 3070 GPU, and backlight brightness control isn’t working at all.
