I have tried both the official Ubuntu Mate image and Ubuntu Server + desktopify (mate). The results were the same: if I select 4K resolution, only 30/25/24 Hz are showing in the Refresh rate drop-down list in Monitor Preferences.
Why is it so? Is it a hardware limitation, or Mate bug, or is my micro HDMI adapter/cable faulty?
Re: Ubuntu Mate, 4K only 30fps?
https://www.raspberrypi.org/documentati ... -config.md
The Raspberry Pi 4 can drive up to two displays, with a resolution up to 1080p at a 60Hz refresh rate. At 4K resolution, if you connect two displays then you are limited to a 30Hz refresh rate. You can also drive a single display at 4K with a 60Hz refresh rate: this requires that the display is attached to the HDMI port adjacent to the USB-C power input (labelled HDMI0). You must also enable 4Kp60 output by setting the hdmi_enable_4kp60=1 flag in config.txt.
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W. H. Heydt
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Re: Ubuntu Mate, 4K only 30fps?
That would seem to be a question to ask on a Ubuntu forum.pigod wrote: ↑Fri Jul 31, 2020 6:48 pmI have tried both the official Ubuntu Mate image and Ubuntu Server + desktopify (mate). The results were the same: if I select 4K resolution, only 30/25/24 Hz are showing in the Refresh rate drop-down list in Monitor Preferences.
Why is it so? Is it a hardware limitation, or Mate bug, or is my micro HDMI adapter/cable faulty?