[Stable Update] 2020-12-30 - Kernels, KDE, Cinnamon, LibreOffice, Python 3.9, Mesa 20.3.1

[linub]

maybe this but i have no idea:

PCI-Express runtime D3 power management broken by commit 4d03e3cc59828(?)

After update to kernel 5.10, cannot enable external monitor

I’m experiencing the same problem. There are workarounds, fortunately: downgrade to the 5.4 kernel (or any version, really, but preferably an LTS version) if you can (that’s the simplest); or use the beta NVIDIA drivers from AUR (nvidia-utils-dkms, nvidia-beta-dkms); or use optimus-manager and switch to the “nvidia” mode, but note that PRIME synchronization is seemingly non-functioning with NVIDIA 455.45.01 + Linux 5.10, and using the NVIDIA GPU to do all rendering has implications on the batt…