HDMI output resolution

uConsole
1

Is 1080p the highest supported resolution for the HDMI port?

2

Which core? On paper the CM4 should be able to output 4Kp60 through HDMI. https://www.raspberrypi.com/documentation/computers/config_txt.html

2 Likes
3

I have a devterm (with the latest clockworkpi mainboard, which I assume is the same one in the uConsole) with the CM4 core. Plugging my main monitor in to it and fetching the available modes gives me

Output HDMI-A-1 'Samsung Electric Company U32J59x HTPM200353' (focused)
  Current mode: 1920x1080 @ 60.000 Hz
  Position: 1280,0
  Scale factor: 1.000000
  Scale filter: nearest
  Subpixel hinting: unknown
  Transform: normal
  Workspace: 1
  Max render time: off
  Adaptive sync: disabled
  Available modes:
    3840x2160 @ 30.000 Hz
    3840x2160 @ 30.000 Hz
    3840x2160 @ 29.970 Hz
    3840x2160 @ 25.000 Hz
    3840x2160 @ 24.000 Hz
    3840x2160 @ 23.976 Hz
    2560x1440 @ 59.951 Hz
    1920x1080 @ 60.000 Hz
    1920x1080 @ 60.000 Hz
    1920x1080 @ 59.940 Hz
    1920x1080 @ 50.000 Hz
    1920x1080 @ 50.000 Hz
    1920x1080 @ 30.000 Hz
    1920x1080 @ 29.970 Hz
    1920x1080 @ 24.000 Hz
    1920x1080 @ 23.976 Hz
    1680x1050 @ 59.883 Hz
    1600x900 @ 60.000 Hz
    1280x1024 @ 75.025 Hz
    1280x1024 @ 60.020 Hz
    1440x900 @ 59.901 Hz
    1280x800 @ 59.910 Hz
    1152x864 @ 75.000 Hz
    1280x720 @ 60.000 Hz
    1280x720 @ 60.000 Hz
    1280x720 @ 59.940 Hz
    1280x720 @ 50.000 Hz
    1024x768 @ 75.029 Hz
    1024x768 @ 70.069 Hz
    1024x768 @ 60.004 Hz
    832x624 @ 74.551 Hz
    800x600 @ 75.000 Hz
    800x600 @ 72.188 Hz
    800x600 @ 60.317 Hz
    800x600 @ 56.250 Hz
    720x576 @ 50.000 Hz
    720x480 @ 60.000 Hz
    720x480 @ 59.940 Hz
    640x480 @ 75.000 Hz
    640x480 @ 72.809 Hz
    640x480 @ 66.667 Hz
    640x480 @ 60.000 Hz
    640x480 @ 59.940 Hz
    720x400 @ 70.082 Hz

I’m not sure why I don’t have an option for 4k at 60Hz, it might be a limitation of the main board, or my cheap aliexpress micro HDMI connector.

I usually run the external display at 1080p, but trying it out at 3840x2160@30Hz for a few minutes just now looked fine.

4

You have to enable 4K@60Hz in the boot options. It’s possible but at the edge of what the CM4 can do.

3 Likes
5

I have the A06, I don’t know if that changes anything.

6

The A-06 is powered by a Rockchip RK3399, which should be able to manage at least 4K@30Hz. Not sure about the specifics for configuring it though.