Public bug reported: Upon startup after a routine software update, my desktop was limited to 640×480 resolution, making the desktop UI unusable. Switching graphics drivers didn't help.
Downgrading the kernel from linux-image-5.11.0-7612-generic to linux- image-5.8.0-7642-generic via Grub after restart solved the problem, at least temporarily. After the "fix" (reversion to old kernel): $ uname -a Linux flying-gazelle 5.8.0-7642-generic #47~1614007149~20.10~82fb226~dev-Ubuntu SMP Wed Feb 24 15:29:29 x86_64 x86_64 x86_64 GNU/Linux $ lsb_release -rd Description: Ubuntu 20.10 Release: 20.10 $ apt-cache policy nvidia-dkms-390 nvidia-dkms-390: Installed: 390.141-0ubuntu0.20.10.1 Candidate: 390.141-0ubuntu0.20.10.1 Version table: *** 390.141-0ubuntu0.20.10.1 500 500 http://us.archive.ubuntu.com/ubuntu groovy-updates/restricted amd64 Packages 500 http://security.ubuntu.com/ubuntu groovy-security/restricted amd64 Packages 100 /var/lib/dpkg/status 390.138-0ubuntu2 500 500 http://us.archive.ubuntu.com/ubuntu groovy/restricted amd64 Packages ProblemType: Package DistroRelease: Ubuntu 20.10 Package: nvidia-dkms-390 390.141-0ubuntu0.20.10.1 ProcVersionSignature: Ubuntu 5.11.0-7612.13~1617215757~20.10~97a8d1a~dev-generic 5.11.7 Uname: Linux 5.11.0-7612-generic x86_64 ApportVersion: 2.20.11-0ubuntu50.5 Architecture: amd64 CasperMD5CheckResult: skip Date: Sun Apr 4 08:52:31 2021 ErrorMessage: installed nvidia-dkms-390 package post-installation script subprocess returned error exit status 10 InstallationDate: Installed on 2016-09-24 (1652 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) Python3Details: /usr/bin/python3.8, Python 3.8.6, python3-minimal, 3.8.6-0ubuntu1 PythonDetails: N/A RelatedPackageVersions: dpkg 1.20.5ubuntu2 apt 2.1.10ubuntu0.2 SourcePackage: nvidia-graphics-drivers-390 Title: package nvidia-dkms-390 390.141-0ubuntu0.20.10.1 failed to install/upgrade: installed nvidia-dkms-390 package post-installation script subprocess returned error exit status 10 UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: nvidia-graphics-drivers-390 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-package groovy third-party-packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1922523 Title: package nvidia-dkms-390 390.141-0ubuntu0.20.10.1 failed to install/upgrade: installed nvidia-dkms-390 package post-installation script subprocess returned error exit status 10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/+bug/1922523/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs