nvidia-kernel-source-440-server 440.95.01-0ubuntu0.20.04.1: nvidia kernel module failed to build

[Aules Metellius]

Updating the kernel from 5.4 to 5.8

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: nvidia-kernel-source-440-server 440.95.01-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.4.0-59.65-generic 5.4.78
Uname: Linux 5.4.0-59-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
DKMSKernelVersion: 5.8.0-34-generic
Date: Wed Jan 6 16:48:18 2021
Dependencies:

DuplicateSignature: dkms:nvidia-kernel-source-440-server:440.95.01-0ubuntu0.20.04.1:/var/lib/dkms/nvidia/440.95.01/build/common/inc/nv-linux.h:512:17: error: too many arguments to function ‘__vmalloc’
InstallationDate: Installed on 2020-07-28 (161 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageVersion: 440.95.01-0ubuntu0.20.04.1
Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.2
SourcePackage: nvidia-graphics-drivers-440-server
Title: nvidia-kernel-source-440-server 440.95.01-0ubuntu0.20.04.1: nvidia kernel module failed to build
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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

[Ben (ben-durrans)]

To fix the fallout: First, ensure you are running the latest kernel and all your other packages are up-to-date; Then in "Software & Updates" > "Additional Drivers" change to the Nouveau driver (which seemed to uninstall all the Nvidia packages); Finally run `sudo -i ubuntu-drivers autoinstall` which should select the correct Nvidia driver.

[Robin (rxryrz1234)]

https://forums.developer.nvidia.com/t/linux-kernel-5-8-0-rc-3-1-breaks-nvidia-driver/140602

appears relevant. This claims to be fixed in the 450.57 driver release

https://www.nvidia.com/download/driverResults.aspx/162107/en-us

Attempting to switch to nvidia-driver-450-server via "Software & Updates" > "Additional Drivers" (for me) reported unmet dependencies for llvm10. Despite this, the driver change still appeared to run. It never declared completion, but having waited until nothing further appeared to be happening and rebooted, "Additional Drivers" reports that I am using the 450 driver, and this appears to have addressed the obvious symptoms.