Hello @3v1n0

Still no luck. I added ci-train-ppa-service/4112 ppa and restarted the
session. There are logs (see attachment).

Bellow some info of my hardware:

$ inxi -G
Graphics:  Device-1: NVIDIA GP104 [GeForce GTX 1080] driver: nvidia v: 440.100 
           Display: x11 server: X.Org 1.20.8 driver: nvidia unloaded: 
fbdev,modesetting,nouveau,vesa 
           resolution: 3840x2160~60Hz 
           OpenGL: renderer: GeForce GTX 1080/PCIe/SSE2 v: 4.6.0 NVIDIA 440.100

$ lshw -c video
  *-display                 
       description: VGA compatible controller
       product: GP104 [GeForce GTX 1080]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:06:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:66 memory:fa000000-faffffff memory:c0000000-cfffffff 
memory:d0000000-d1ffffff ioport:e000(size=128) memory:c0000-dffff

$ lspci | egrep -i vid\|vga
06:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1080] 
(rev a1)
06:00.1 Audio device: NVIDIA Corporation GP104 High Definition Audio Controller 
(rev a1)


$ xrandr 
Screen 0: minimum 8 x 8, current 3840 x 2160, maximum 32767 x 32767
DVI-D-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y 
axis) 600mm x 340mm
   3840x2160     60.00*+  59.94    50.00    30.00    29.97    25.00    23.98  
   2560x1440     59.95  
   1920x1080     60.00    59.94    50.00    29.97    23.98  
   1600x900      60.00  
   1280x1024     60.02  
   1280x800      59.81  
   1280x720      60.00    59.94  
   1152x864      60.00  
   1024x768      60.00  
   800x600       60.32  
   720x576       50.00  
   720x480       59.94  
   640x480       59.94    59.93  
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)


** Attachment added: "gnome-shell logs"
   
https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1870736/+attachment/5387336/+files/debug-mutter.log

-- 
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/1870736

Title:
  [nvidia] Screen scaling 125% gives 200%

Status in gnome-control-center package in Ubuntu:
  Confirmed
Status in mutter package in Ubuntu:
  Confirmed

Bug description:
  Procedure used:
  1.
  Fully updated system via apt update && apt upgrade

  2.
  Select the screen setup in gnome control center

  3. 
  Click the "Fractional scaling" toggle

  4. 
  Select 125% and click the green "use" button top right (it says "Anvend" in 
dansih)

  5.
  Observe that the window has grown a lot, click the "use new settings" button

  6.
  The window tells me, I am at 200% scaling. The "200%" option is now 
highlighted.

  7.
  Switch back to 100% and file this bug.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.16
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu22
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Apr  4 09:42:34 2020
  InstallationDate: Installed on 2018-01-14 (810 days ago)
  InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 
(20170801)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=da_DK.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to focal on 2020-04-03 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1870736/+subscriptions

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