Thank you @balbes150 for you ROM.
I have 3 different boxes.
A: 2G/16G, SV6501 WIFI. (MXQ Pro + 4K)
B: 1G/8G, (MXQ Pro + 4K)
C: 1G/8G. (MXQ Pro 4K)
I tried 3 IMG's.
a: Armbian_5.37_S9xxx_Ubuntu_xenial_3.14.29_mate_20171226.img
b: Armbian_5.44_S9xxx_Ubuntu_xenial_3.14.29_mate_20180515.img
<ISSUES>
IMG a
a1. wifi doesn't work for A/B/C. no ssv6051-wifi.
a2. can't install to emmc for C. (/dev/boot no such file or dircetory) (ddbr unable to found your emmc driver)
IMG b
b1. no error for wifi. but can't find it. even added wifi_dummy in /etc/modules
b2. HDMI can't be setted to 720P, a1 could do it.
Can you tell me what's box's SPEC you have and the image tested ok on it.
And can I have you email, I have a special idea for the these. mine is 7188209@qq.com