Under Manjaro Gnome I had continuous problems with scaling, resizing, and display orientation. Gnome would continuously crash and enabling the proprietary driver (video-nvidia) instead of the hybrid driver would break things entirely. The solution was to remove ‘kms’ from the HOOKS in the cpio config (/etc/mkinitcpio.conf) and rebuild the initramfs as well as adding (nvidia_drm.fbdev=1 nvidia_drm.modeset=1) to the default command line for the kernel (/etc/default/grub) and rebuilding the grub configuration.