06-16-2019, 02:53 PM
(This post was last modified: 06-16-2019, 07:43 PM by rrosenheim.
Edit Reason: Updated information
)
I just got a Rock64Pro and I installed DietPi (running MATE as the UI) on it. Boots up just fine, but the video is standard HD (1920x1080). I went into Control Centre and 4K resolution isn't even listed in the Resolution drop down. Anyone have any suggestions on how I can get/enable 4K resolution?
The monitor is 4K, and Rock64 running DietPi operates in 4K mode. I'm using the Rock64Pro version of DietPi.
Thanks,
Richard
Here's an update. I was able to find an article online which provided me with the following commands to switch to 4K mode:
xrandr --newmode "3840x2160" 338.75 3840 4080 4488 5136 2160 2163 2168 2200 -hsync +vsync
xrandr --addmode HDMI-1 "3840x2160"
xrandr --output HDMI-1 --mode "3840x2160"
When executed in Terminal, the system will switch to 4K resolution. And under Armbian Ubuntu, if I add those lines to ~/.profile, Ubuntu boots to 4K resolution. When I tried adding those lines to ~/.profile under DietPi (with MATE as the UI), it doesn't work.
I'm guessing that with DietPi/MATE, I need to add those lines to a different file. Does anyone know which file I need to edit?
The monitor is 4K, and Rock64 running DietPi operates in 4K mode. I'm using the Rock64Pro version of DietPi.
Thanks,
Richard
Here's an update. I was able to find an article online which provided me with the following commands to switch to 4K mode:
xrandr --newmode "3840x2160" 338.75 3840 4080 4488 5136 2160 2163 2168 2200 -hsync +vsync
xrandr --addmode HDMI-1 "3840x2160"
xrandr --output HDMI-1 --mode "3840x2160"
When executed in Terminal, the system will switch to 4K resolution. And under Armbian Ubuntu, if I add those lines to ~/.profile, Ubuntu boots to 4K resolution. When I tried adding those lines to ~/.profile under DietPi (with MATE as the UI), it doesn't work.
I'm guessing that with DietPi/MATE, I need to add those lines to a different file. Does anyone know which file I need to edit?
