Can you please look in Settings > Screen Display and tell us if
'Fractional Scaling' is enabled?
** Changed in: mutter (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1873266
Title:
[nvidia] cannot change main monitor after setting scaling for monitors
Status in gnome-control-center package in Ubuntu:
Incomplete
Status in mutter package in Ubuntu:
Incomplete
Status in nvidia-graphics-drivers-440 package in Ubuntu:
Incomplete
Bug description:
After booting with nvidia drivers, if I change which monitor is the
main one first, then change the scaling from 100% to 200%, it works.
But doing this in the inverse direction, by first setting the scaling
and then changing the main monitor, it fails and the screens go black.
Oddly enough, it also fails to revert this setting and I have to hard-
reboot (though I could probably try switching ttys, etc).
This is with focal and focal-proposed enabled. I also have the proprietary
440 nvidia drivers enabled, and I'm using default gnome with x11.
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ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2019-07-05 (287 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset
nvidia
Package: nvidia-graphics-drivers-440
PackageArchitecture: amd64
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
Tags: focal package-from-proposed
Uname: Linux 5.4.0-24-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip docker kvm libvirt lpadmin lxd plugdev sambashare
sudo
_MarkForUpload: True
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