Oh wow, it works!!!

I installed g++-10 and gcc-10 with:
sudo apt install g++-10
sudo apt install gcc-10

Then I ran this command:
sudo make CC=gcc-10 CPP=g++-10 CXX=g++-10 LD=g++-10

with error, because I had to run ./configure command again. So I did and then tried it again.

After that I've finally built retroarch core package and performed basic installation of Retropie.

I could not figure it out myself. Thank you for your direction, you're the best! ;)

I finally have a solution that is working for me.

I found that if I have the PulseAudio Volume Control application (pavucontrol) open and then start emulationstation, Pitfall will properly output it's audio via HDMI.

As a kludge, I added PulseAudio Volume Control to my Startup Applications and now I consistently and seemingly have reliable audio output via HDMI.

It makes no sense to me whatsoever, but my best guess is that having it open forces it to use the Digital Stereo (HDMI) Output profile.

@daragon said in Intel NUC 8i5BEK:

EDIT3 (and the last): NEVER and NEVER run an emulator using sudo command, that's why I could not properly configurate my controller - Retropie runs emulators without sudo I suppose...

Ah yes, this might make some sense after all. If you ran it with sudo the first time, the configuration file probably got saved with root ownership or permissions. Then when it runs as the regular pi user from ES, it doesn't have ownership or permission to edit the file most likely. I've seen the Windows version of this snafu before.

@legion28 i have the same problem, only solution is to downgrade RA version...
In my case, when a press Xbox 360 guide button, its return to emulationstation...

I'm running an UP Core board with pretty much the same specs and it runs really well. I'm able to use pretty much all the lag reducing features (including runahead of 3 frames) on 8 and 16 bit consoles with no issues.

Getting the audio to work is a bit tricky, but check out "linuxium" blog that had excellent instructions on how to get it working

@mitu Thanks so much for that! I got it all working great! Now I just have to figure out how to get the system to work with my Logitech universal remote!

Update for any future google searchers. I installed Ubuntu 16.04 and everything is working fine, I don't have a particular need to be on 17.04 but it would be nice to know why it is having issues for me. I'm still open to suggestions but in the meantime I’ll stick with 16.04 for now.