@dankcushions it’s about performance. On 2016 I can play eg. Die Hard Arcade with minimal slowdowns during QTE but overall game is pretty playable. With current mame it works in around 10 fps. Apart from that I have Mame2016 romset and don’t need to find another source for that.
I removed cfg file from arcade folder and I'm back on RGUI. Still having some problems as keys set in ES does correspond to those in RetroArch but I guess I have to do some further steps removing "broken" retroarch.cfg files from few places and then reinstall RA from setup script and hope it will fix it.
Thanks a lot for your help!!!!!!!
"May 03 12:11:25 lvl3: UIModeController::logInput( Xbox 360 Wireless Receiver (XBOX) ):Button 0, isMappedTo= a, , value=1
May 03 12:11:25 lvl2: req sound [video.launch]
May 03 12:11:25 lvl2: (missing)
May 03 12:11:26 lvl2: Attempting to launch game...
So no errors.....
But I have managed to find a fix.
I'm also using the gtx970 as my sound card. if I disable this retropie works fine.
Guess this will just be one of these really odd bugs that only effects me :)