Comment 214 for bug 1870736

@cica-kutya there is solution - nvidia kms. And fractional scaling work without any issues(like tearing on intel) for me. I have single gpu setup(no hybrid graphics).
You can activate it by:
1. Set nvidia_drm module option:
$ cat /etc/modprobe.d/nvidia-modeset.conf
options nvidia_drm modeset=1
2. Add same option to kernel cmdline:
$ cat /etc/default/grub
....
GRUB_CMDLINE_LINUX_DEFAULT="nvidia_drm.modeset=1 quiet splash"
....
3. Update initrd
$ sudo update-initramfs -u -k all
4. Reboot
5. Check it
$ sudo cat /sys/module/nvidia_drm/parameters/modeset
Y
6. Activate fraction scaling