Fractional Scaling does not work properly ubuntu 20.04

Just updated to 20.04 and tried the fractional scaling on my laptop. That does not work at all. Whatever scaling I use it just sets 200%. I googled it and it seems works with wayland server only. I did not find any good solutions to fix it or install wayland instead of xorg. Can you help? Thanks in advance!

  Graphics:
  Device-1: Intel UHD Graphics 620 vendor: Xiaomi driver: i915 v: kernel 
  bus ID: 00:02.0 chip ID: 8086:5917 
  Device-2: NVIDIA GP108M [GeForce MX150] vendor: Xiaomi driver: nvidia 
  v: 435.21 bus ID: 01:00.0 chip ID: 10de:1d12 
  Display: x11 server: X.Org 1.20.8 driver: modesetting,nvidia 
  unloaded: fbdev,nouveau,vesa compositor: gnome-shell tty: N/A 
  OpenGL: renderer: GeForce MX150/PCIe/SSE2 v: 4.6.0 NVIDIA 435.21 
  direct render: Yes 

Solution 1:

This is a bug with Ubuntu 20.04 + the latest nvidia drivers (435 proprietary and 440 proprietary, tested as far as I'm aware). Check out the launchpad thread. I'm having the same issue with 20.04 + nvidia-driver-440 (GeForce RTX 2080).

Solution 2:

This worked for me:

1. Open nvidia setting
2. In PRIME profiles (or another tab) find GPU list
3. Change GPU to NVIDIA On-Demand
4. Restart your system

Note: This method may affect the performance of some applications.

Solution 3:

At my case, a workaround is:

• In the Settings -> Displays: Set Scale to 100%
• In the Tweaks -> Fonts: Set Scaling Factor to desired value (in my case it's 1.25)

PS: If you don't have Tweaks: install it via: sudo apt install gnome-tweaks

Solution 4:

Try using HDMI port for monitor instead of Thunderbolt USB C. Fractional scaling works there because HDMI port works with NVIDIA graphics card!