FYI, I had the problems of nVidia settings not surviving since 18.04 (and every release in between) up to 20.04.
I believe the underlying cause is that gdm3 greeter opens a new X Screen for the user session after login, and a discrepancy between the X screen configurations cannot be resolved because there is no way -- or, more precisely, none that I'm aware of -- that would allow storing anywhere, a configuration for the new X Screen that gets spawned. Proof of the existence of a new X Screen can be found by starting a remote terminal session against the target system and then running "sudo lsof /tmp/.X11-unix/X* ". Before the login, only one pid exists from node "/tmp/.X11-unix/X0". After the login, a second pid exists from node "/tmp/.X11-unix/X1". I believe this "X0" and "X1" refer to "X Screen 0" and "X Screen 1", but the /etc/X11/xorg.conf file know only about Screen 0 -- therefore initializing a new screen after every login and/or return after the screen saver has been used. Further proof can be found by switching from gdm3 to lightdm by issuing "sudo dpkg-reconfigure lightdm". This causes other problems (with background screens and alignment of screens, etc), but it proves the fact that monitor layout configurations survive on the same hardware/software components (specifically, same version of nVidia drivers, xorg.conf files, ec), when all that changes is the display manager and how it handles X Screens. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1874217 Title: [nvidia] Dual monitor setup with secondary monitor in portrait-right mode cause tiled windows to occupy 1.5 monitors Status in gnome-control-center: Unknown Status in gnome-control-center package in Ubuntu: Confirmed Status in mutter package in Ubuntu: Confirmed Bug description: I'm on Ubuntu 20.04 AMD64 fully up to date and freshly rebooted. I use dual screen : the main screen is on the left side (32"), the secondary screen (19") is at right and in portrait mode (rotated right). The window are improperly growed : they extend from full main screen to half the "witdh" of the secondary screen. Additionnally, the « pop-up » menus (eg. from settings) do not appear at the right place (see screen capture in comment). The problem disappears if I revert the orientation of secondary screen from « portrait turned right » to « landscape ». I do have gnome-shell-extension-ubuntu-dock in version 67ubuntu20.04.5, but still got the problem. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: gnome-shell 3.36.1-5ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30 Uname: Linux 5.4.0-26-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Wed Apr 22 11:11:25 2020 DisplayManager: gdm3 InstallationDate: Installed on 2020-04-19 (2 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash RelatedPackageVersions: mutter-common 3.36.1-3ubuntu3 SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-control-center/+bug/1874217/+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
