Hi:
I have an olimex-mirco A2O board. I have already run A20-OLinuXino-MICRO Debian Jessie with kernel 3.4.103+ release 12 on it, and everyting is ok.
I use the HDMI screen, because the kernel sets vedio output is HDMI 720p by default. when running , i can see the debian GUI in the screen.
After that, I got the Armbian_5.20_Micro_Debian_jessie_3.4.112.iso, and dd the image into the SD card. The board can work. I can login into Debian by ssh. In boot procedure, I can see the boot information on the HDMI screen, but after boot finished, the hdmi screen only display blue. Because the kernel does not output signal to HDMI interface.
I input the command by SSH terminal: a10disp changehdmimodeforce 4
Then i got prompt is: hdmi is not enable
I read the getting started and other documents on armbian.com. Because English is not my native language, so I don't understand the documents very well. I just guess, I must config the display setting for enable HDMI in the uboot setting. But I don't konw how do I config it?
Who can give me some hint? Thanks very much!