RetroPie on Rock64

[LTronic]

Once again great job. 

Here is some initial feedback: 

1) I think something is wrong with webgui permissions - files do not copy over, can't check because point 4)
2) Retropie setup and other options accessible via emulationstation require sudo (you are prompted for password)
3) ssh doesn't work 
4) Alsamixer keeps complaining ' VolumeControl::init() - Failed to find mixer elements!' 
5) No sound via HDMI (probably related to previous point).
6) On my monitor games run at 120hz, which results in 120fps  (feels like playing in 'fast forward')

Thanks a lot for the feedback and your kind words

Sound issues :
Rebasing on the top of ayufan 0.5.4 releases will fix this (I have it WIP). Alsamixer message is probably related to HDMI sound, yes.

Sudo issue :
Yeah, I need to edit the /etc/sudoers file in order to make rock64 able to do sudo without password. Editing the file manually through visudo is an easy fix, but I need to figure out a way to script this however.

Webgui :
It works fine on my system so I am a bit puzzled about this one. Once you have SSH resolved (see below) could you check what's going on on your system (permissions and so on) ?

SSH issue :
I need help on this one. Could you try hooking a keyboard/mouse to your board or using serial console and see the network configuration ?
Could you try ayufan latest xenial minimal and see if you have the same issue ?
I suspect this is the dhcp client not firing up and I can't see why.

Monitor issue :
I don't have any 120 Hz monitor to test, I will need help on this one too. I think it is related to SDL2 KMS/DRM implementation.

I will do my best tonight to release a version with working sound and sudo issue fixed (already WIP).

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6) On my monitor games run at 120hz, which results in 120fps  (feels like playing in 'fast forward')

A quick research on the libretro forums points me to :

Edit your retroarch.cfg and add or edit the key to something like
video_refresh_rate = "120.000000"

Worth a try.