> Could you please give me some hints how to identify it's a bug in the VMware Xorg graphics driver?
The hint was that it only happened on the one system I've ever seen that was using Xorg on VMware. :) If the problem was more general than that then someone else would have reported it in the 2+ years since Ubuntu 20.04 was released. Although bug 1865963 might be the same issue, maybe? ** Summary changed: - [vmwgfx] Login screen not refreshing properly on vSphere + [vmwgfx] Login screen not refreshing properly on vSphere when WaylandEnable=false -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-vmware in Ubuntu. https://bugs.launchpad.net/bugs/1973660 Title: [vmwgfx] Login screen not refreshing properly on vSphere when WaylandEnable=false Status in xserver-xorg-video-vmware package in Ubuntu: New Bug description: 1) The release of Ubuntu you are using Description: Ubuntu 20.04.4 LTS Release: 20.04 2) The version of the package you are using, gnome-shell: Installed: 3.36.9-0ubuntu0.20.04.2 Candidate: 3.36.9-0ubuntu0.20.04.2 Version table: *** 3.36.9-0ubuntu0.20.04.2 500 500 mirror://mirrors.ubuntu.com/mirrors.txt focal-updates/main amd64 Packages 500 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 100 /var/lib/dpkg/status 3.36.4-1ubuntu1~20.04.2 500 500 mirror://mirrors.ubuntu.com/mirrors.txt focal-security/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 3.36.1-5ubuntu1 500 500 mirror://mirrors.ubuntu.com/mirrors.txt focal/main amd64 Packages 500 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 Packages 3) What you expected to happen The login screen can resize properly and all its widgets shows properly. 4) What happened instead Login screen doesn't refresh properly when resize vShpere window, so that can't input username and password. And I found pressing Ctl-Alt-Tab can force the login screen refresh. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.23 Architecture: amd64 CasperMD5CheckResult: skip DisplayManager: gdm3 DistroRelease: Ubuntu 20.04 GsettingsChanges: b'org.gnome.desktop.interface' b'scaling-factor' b'uint32 1' b'org.gnome.desktop.lockdown' b'disable-lock-screen' b'true' b'org.gnome.desktop.screensaver' b'idle-activation-enabled' b'false' b'org.gnome.desktop.screensaver' b'lock-enabled' b'false' b'org.gnome.desktop.session' b'idle-delay' b'uint32 0' InstallationDate: Installed on 2020-08-13 (641 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) Package: gnome-shell 3.36.9-0ubuntu0.20.04.2 [modified: usr/lib/gnome-shell/libgnome-shell.so] PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.13.0-40.45~20.04.1-generic 5.13.19 RelatedPackageVersions: mutter-common 3.36.9-0ubuntu0.20.04.2 Tags: focal Uname: Linux 5.13.0-40-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-vmware/+bug/1973660/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

