nvidia drivers will not load

[Magnus Morton]

nvidia drivers will no longer load after upgrade to kernel 5.8.0-45.

This is an OPTIMUS laptop. Before, Intel and nvidia GPUs would be active; now, nvidia drivers will not load and external monitors will not be detected. Everything works correctly if I switch to nouveau.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: nvidia-driver-460 460.39-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.8.0-45.51~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-45-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 15 15:50:27 2021
InstallationDate: Installed on 2021-03-08 (7 days ago)
InstallationMedia: Ubuntu 20.04.2 LTS "Focal Fossa" - Release amd64 (20210204)
SourcePackage: nvidia-graphics-drivers-460
UpgradeStatus: No upgrade log present (probably fresh install)

[Magnus Morton (jaffachief)]

I've added an excerpt from the apt log. There were errors rebuilding the kernel modules during the kernel upgrade

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[MG (mgg1)]

I have the same issue on a laptop with Optimus and on a desktop with dedicated Nvidia GPU.
My apt log looks the same (attached).
I switched back to 5.8.0-44.