This happened to me as well on Kubuntu 20.10. This bug seems to be upstream.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to nvidia-graphics-drivers-455 in Ubuntu. https://bugs.launchpad.net/bugs/1909871 Title: package nvidia-dkms-455 455.38-0ubuntu0.20.04.1 failed to install/upgrade: installed nvidia-dkms-455 package post-installation script subprocess returned error exit status 10 Status in nvidia-graphics-drivers-455 package in Ubuntu: Confirmed Bug description: what happened: ============== updated kernel from 5.4 to 5.10.4, reinstalled nvidia-driver-455 and it failed details: ========= lsb_release -rd Description: Ubuntu 20.04.1 LTS Release: 20.04 apt-cache policy nvidia-driver-455 nvidia-driver-455: Installed: 455.38-0ubuntu0.20.04.1 Candidate: 455.38-0ubuntu0.20.04.1 Version table: *** 455.38-0ubuntu0.20.04.1 500 500 http://in.archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 Packages 100 /var/lib/dpkg/status what should happen: ================== install successfully ProblemType: Package DistroRelease: Ubuntu 20.04 Package: nvidia-dkms-455 455.38-0ubuntu0.20.04.1 Uname: Linux 5.10.4-051004-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.14 Architecture: amd64 CasperMD5CheckResult: skip Date: Sun Jan 3 00:38:29 2021 ErrorMessage: installed nvidia-dkms-455 package post-installation script subprocess returned error exit status 10 InstallationDate: Installed on 2020-12-27 (6 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) 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-455 Title: package nvidia-dkms-455 455.38-0ubuntu0.20.04.1 failed to install/upgrade: installed nvidia-dkms-455 package post-installation script subprocess returned error exit status 10 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-455/+bug/1909871/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
