I'm copying my comment from bug 1857383 as I think this one is more pertinent. I'm on xorg, you can find the apport information in bug 1857383 starting comment #22.
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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874559 Title: Fractional Scaling resets after reboot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1874559/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
