renard

I did a quick test to confirm there is nothing wrong on our side.
 
1. Download latest Debian Stretch, setup AP within armbian-config, test AP with a phone, ...
2. Upgrade to latest Nightly packages and test AP. Working fine.

If you use some manual operations, you have to know exactly what you are doing. 

Logs: http://ix.io/1q6A

Thank you.
 
I have figure it out from an topic about pine64.  I modified and recompiled the boot.cmd. Now everything is Okay.
 
 

Download older version and not update. You are using development image which comes without end user support.
 
Hint - DTB file is not in right location: 
ERROR: Did not find a cmdline Flattened Device Tree

the hdmi part of linux doesnt work yet so you'll see the part of the booting up process and then nothing. we dont have an eta on hdmi working yet
 
buy a usb-ttl device and hook that to the serial connection
 
the ethernet port may not work either as they have pulled support for that for the moment. wifi only

If you are using the mainline kernel, you can use configfs for setting up USB HID. Try this example:
    modprobe libcomposite     mount -t configfs none /sys/kernel/config     cd /sys/kernel/config/usb_gadget     mkdir g1     cd g1     mkdir configs/c.1     mkdir functions/hid.usb0     echo 1 > functions/hid.usb0/protocol     echo 1 > functions/hid.usb0/subclass     echo 8 > functions/hid.usb0/report_length     cat my_report_desc > functions/hid.usb0/report_desc     mkdir strings/0x409     mkdir configs/c.1/strings/0x409     echo 0xa4ac > idProduct     echo 0x0525 > idVendor     echo serial > strings/0x409/serialnumber     echo manufacturer > strings/0x409/manufacturer     echo HID Gadget > strings/0x409/product     echo "Conf 1" > configs/c.1/strings/0x409/configuration     echo 120 > configs/c.1/MaxPower     ln -s functions/hid.usb0 configs/c.1     ls /sys/class/udc > UDC  
Which I got from my own working USB OTG ethernet + midi + file storage script and this example here. Note that they create a file called "my_report_desc" for HID specific stuff. 

Thanks! Also found this thread now and it also says about libcomposite.  

Will try it out.