I have Ubuntu Budgie 18.04.2 LTS installed on an Acer F15 F5-573-70EB[Here] laptop with an i7 CPU, NVIDIA GTX 950m GPU, and 16GB RAM. I connect it to a Philips 4K HDR TV.
Before installing NVIDIA's drivers, full HD worked fine on the integrated Intel 620 GPU. Yet choosing 4k resolution with 200% scaling option, playback became laggy, non smooth, both in browser and VLC. I reverted back to 1080P which is fine.
After installing NVIDIA drivers from within Ubuntu updates and software, I get the same results.
How should I approach solving this?