Home / ubuntu / Questions / 1255025
In Process
tomaytotomato
Asked: 2020-07-01 00:44:18 +0800 CST

Ubuntu 20.04 4K resolution low FPS / stuttering?

  • 772

I have setup Ubuntu 20.04 in Dual boot with Windows 10.

On Windows 10 @ 3840 x 2160 (16:9) resolution I do not have any issues with video, smooth scrolling, IDE, games.

However on Ubuntu @ 3840 x 2160 (16:9) resolution, I get stuttering low FPS for video, jaggy/rough scrolling.

When I set it to 2048 x 1152 (16:9) resolution it is way smoother and no issues.

My hardware info is the following:

Intel(R) Core(TM) i5-4690K CPU @ 3.50GHz
Palit GeForce RTX 2070 8Gb
16Gb DDR3 2400mhz Corsair Vengeance RAM
LG 27inch 4K Monitor

These are the following things I've tried:

  • Swapped HDMI to Displayport from GPU to Monitor
  • Tried the prorietary Nvidia drivers (version 440), X.org drivers
  • Restarting Gnome
  • Updating the latest drivers and patches from Ubuntu

I am happy to use the monitor at a lower resolution but I am curious as to what the bottleneck is here?

Is there any fixes?

nvidia display-resolution graphics 4k-monitor

3 Answers

  1. Try disabling fractional displaying on displays. Go to Ubuntu settings / Displays, and set 100% for scale, and disable the "Fractionl Scaling" feature:

    Ubuntu settings

    Source: Chrome menus too slow after enabling fractional scaling in Ubuntu 20.04

    • 0

  2. Use a newer beta driver for Nvidia. 465 works.

    • 0

  3. Install Ubuntu 18.04 LTS instead. There seems to be some incompatibility issues with nvidia drivers and the latest version of Ubuntu. See my answer here to a similar question.

    • -1