Any news on this subject ? Official Ubuntu is too limited .... I'm thinking to change to armbian my server ..... To install it, does it need a full recompilation ? or is there an img ? where can I find the DTB file for M2 ?

@Hqnicolas I'm a bit late because I have overlooked your request for testing. Now I can confirm that the AuxDisplay works correctly with my H96_tvbox_3566 (with AIC 8800 wlan chip). Thank you for your effort.

Ok, it works, but is there a solution to this problem?

I don't have any I/O errors, which makes me think that your eMMC might be defective because I don't get these errors when I stress mine.

this is my dmesg log. 3ks