Thanks again for your help. I tried Keymap Editor (I'm using a USB mouse to operate): when I press a key on the remote, is not recognized by the system. No one key. That is way no remote.conf produce any sign of life. It seems like that when LibreElec starts, the IR interface is not active. How can I test if the remote is producing any input..?
Have you changed your firmware which came with your device, if yes, that may have changed something and is preventing the remote to work.
If not, this is what I usually do and it works for me:
SSH into libreelec and navigate to the .config folder
place a copy of your remote.conf file into this folder
navigate to the folder rc_keymaps and place a copy of the remote.conf into this folder.
reboot
I don't know if it is necessary or not to put the remote.conf in both locations, I did not try either/or but this method with the remote.conf in both locations works for me on MXQ and M8 devices.