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Tags: 18.04   display   hdmi  
Link: 🔍 See Original Answer on Ask Ubuntu 🔗

URL: https://askubuntu.com/q/1202340
Title: Refresh rate of 60 not available for 4K resolution
ID: /2020/01/11/Refresh-rate-of-60-not-available-for-4K-resolution
Created: January 11, 2020
Upload: November 24, 2022    Layout:  post
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I had the exact same problem with my 4K TV. The solution was to generate a 3840x2160 resolution with a 54 Hz refresh rate:

To summarize I used:

Then take the output from above and pass it to below:

xrandr --newmode "3840x2160_54.00"  637.50  3840 4152 4568 5296  2160 2163 2168 2230 -hsync +vsync

Finally set the monitor to the new resolution - refresh rate:

xrandr --addmode DP-1-1 3840x2160_54.00

The difference between 30 Hz and 54 Hz is night and day. At 30 Hz colors are washed out and causes eye strain.

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