FuSan

@FuSan Cheers! Have fun with your device
 
Do you mean which Armbian build I started with for my device? I started with Station M2 community builds (edge), because it is also a rk3566 device.
These days I run Fedora on my box.

@FuSan The recommended way to switch kernels.in Armbian is through armbian-config

@FuSan So, you have kernel 6.1.x running on your Armbian install. The driver for RTL8821CS chip was added in version 6.3 or 6.4 in the mainline kernel. You can change to a kernel with version 6.6 or later. Try searching for 'linux-image-rockchip64' using apt search command and install that kernel. I usually prefer the edge kernels because I like to stay on the bleeding edge
Then, also install 'armbian-firmware-full' because it has firmware blobs to enable both wifi and bt for 8821cs.
 

@FuSan Please share the output of the dmesg command just after you log in into Armbian.
 
I recall that the swap configuration can be changed by editing the file /etc/default/armbian-zram-config. If you disable zram, then you will see almost 8GB ram in your htop output.
 

Hi @FuSan
 
 
The latest version of Armbian will work just fine. The mainline dtb named rk3566-box-demo.dtb has pretty much everything working for a x88 pro 20 box (except BT and USB 2.0 port)
 
 
I have attached the dtb file that I use (and its source dts file too, in case you want to have a look). This dtb enables the bluetooth to work and also USB 2.0 port.
Try it out and let us know.
 
rk3566-box-demo.dtb rk3566-box-demo.dts