Public bug reported: I'll add more detail shortly..
This issue is video related I believe, and won't impact 18.04.5 release - so I'm just recording for purposes so I can move to next test.. as I type this, the diagonal images are static, however as the cursor moves to the next 'line' in the browser page, the effects change briefly.. it's flashing on major changes of display images, and would be difficult to use, possibly risky if user is prone to seizures... guiverc@dx6120-MT-PL926AV:~$ sudo lshw -C video [sudo] password for guiverc: *-display description: VGA compatible controller product: G73 [GeForce 7600 GT] vendor: NVIDIA Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a1 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller bus_master cap_list rom configuration: driver=nouveau latency=0 resources: irq:27 memory:f1000000-f1ffffff memory:e0000000-efffffff memory:f2000000-f2ffffff ioport:1000(size=128) memory:c0000-dffff ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: kubuntu-desktop (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: 2.20.9-0ubuntu7.16 Architecture: i386 CurrentDesktop: KDE Date: Thu Aug 13 10:02:22 2020 InstallationDate: Installed on 2020-08-12 (0 days ago) InstallationMedia: Kubuntu 18.04.5 LTS "Bionic Beaver" - Release i386 (20200806.1) SourcePackage: kubuntu-meta UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: kubuntu-meta (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug bionic i386 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891408 Title: kubuntu 18.04.5 qa-test, video artifacts & flashes as content on display changes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-meta/+bug/1891408/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs