Hi, I got it to work fine now and I think I know the reason why it didn't work at first.  On my system I start Xorg with startx, so the systemd start the service before xorg is started I think it's not aware of the xorg display session or something even after xorg has started. I'm not knowledgeable enough to be sure but that the most likely culprit IMO Now I start synergy in my windows manager rc and ajuste the permission with sudoer nopasswd  so I can execute as root from the rc