Please find my experience so far.
Flashed the Generic x86_64 version to USB.
Plugged into Beelink S1 (Ubuntu OS) specs from vendor.
Always used from Live USB, i.e. not yet installed.
PSX emulation works great through both Re-Armed & Mednafen HW cores.
Problems arise with PPSSPP cores.
- Using the built-in core, all games show the Lakka flower logo then return to the menu.
- Using latest PPSSPP core (from buildbot, 5th July 2018) in \storage\cores I get this message: lakka failed to open libretro core
To date, I can play PSX games but not PSP ones.
To note that in \storage\system\PPSSPP\ are stored the .zim, flash0, lang and all files required.
Thank you all.