I have found a workaround by adding a sleep period of 5s in the startup application command line for my synergy and hplip-systray on ubuntu 20.04:
sh -c "sleep 5 ; exec /usr/bin/synergy" sh -c "sleep 5 ; exec hp-systray -x"
I have found a workaround by adding a sleep period of 5s in the startup application command line for my synergy and hplip-systray on ubuntu 20.04:
sh -c "sleep 5 ; exec /usr/bin/synergy"
sh -c "sleep 5 ; exec hp-systray -x"