The kernel causing the problem is 5.4.0-42-generic. rolling back to 5.3.0-62-generic eliminated the problem.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1888703 Title: After the latest update on 7/21/20 the screen shows random black horizontal single pixel line stripes in columns about 10-20 pixels long on open windows and icons presented on the desktop. Status in nautilus package in Ubuntu: New Bug description: Everything else works well in the system except for this issue. See attached picture for details. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: nautilus (not installed) ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44 Uname: Linux 5.4.0-42-generic i686 ApportVersion: 2.20.9-0ubuntu7.15 Architecture: i386 CurrentDesktop: MATE Date: Thu Jul 23 08:14:26 2020 InstallationDate: Installed on 2019-12-08 (228 days ago) InstallationMedia: Ubuntu-MATE 18.04.3 LTS "Bionic Beaver" - Release i386 (20190805) SourcePackage: nautilus UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1888703/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp