Using the NVIDIA driver I was affected by bug 1870736 and bug 1873403. I moved to the Nouveau drivers and the issues above were gone.
However, I notice a strange issue with display settings persistence. I have 2 screens (HDMI3-3 FHD, DP-1 4K primary), which I'd like to have respectively at 100% and 150% scale: $ xrandr | grep " connected" DP-1 connected primary 5120x2880+3840+0 (normal left inverted right x axis y axis) 607mm x 345mm HDMI-3 connected 3840x2160+0+302 (normal left inverted right x axis y axis) 160mm x 90mm Whenever I set the 4K screen to 150% scale, any changes won't persist after reboot. If I change any other settings (like changing screen positions), leave scale as 100%, the changes I make do persist on reboot. If after reboot I attempt to set 4K screen to 150% not only the change won't persist after reboot, but it will go back to the initial state (effectively undoing the previous changes too). How do I reproduce the issue: 1) Ensure my system is on Nouveau drivers 2) HDMI-3 (FHD) is currently on the right, DP-1 (4K) on the left 3) Display settings, swap screen positions: HDMI-3 (FHD) on the left, DP-1 (4K) on the right 4) Reboot 5) Verify changes persisted: HDMI-3 (FHD) is on the left, DP-1 (4K) on the right 6) Set DP-1 scale to 150% 7) Reboot 8) Verify not only changes didn't persist, but the status is back as 2), with screens going back to their original position -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1857383 Title: Fractional scaling does not work anymore Status in gnome-shell package in Ubuntu: Confirmed Status in mutter package in Ubuntu: Confirmed Bug description: I have installed Ubuntu 20.04 about 2-3 weeks ago (for the single motive that has fractional scalling) and when activating fractional scalling worked fine, in the meantime i reinstalled again Ubuntu 20.04 (laptop warranty issue) on same hardware but using the latest Ubuntu 20.04 version and now when i activate fractional scalling it does not work anymore. The issue is that it basically zooms both the displays, i can explain best by attaching the printscreens and a picture with my phone on the same thing.You will see in the photo taken with the phone how it actually scales now and how the screenshots are taken... Let me know what logs/commands etc is needed to pinpoint this which i think is a regression. The monitor on which i want to scale is 4k and is connecting through DELL DA300 adapter through USB-C/Thunderbolt ( i have also tried using Dell Dock WD19 but same issue). --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu15 Architecture: amd64 DisplayManager: gdm3 DistroRelease: Ubuntu 20.04 GsettingsChanges: b'org.gnome.mutter' b'experimental-features' b"['scale-monitor-framebuffer']" InstallationDate: Installed on 2019-12-18 (18 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20191127) Package: gnome-shell 3.34.1+git20191024-1ubuntu1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.3.0-24.26-generic 5.3.10 RelatedPackageVersions: mutter-common 3.34.2-2ubuntu1 Tags: focal Uname: Linux 5.3.0-24-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1857383/+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
