Whenever I started boinc-manager after upgrading to Ubuntu 21.10, it couldn’t connect to the BOINC client, stating that:
Invalid client RPC password. Try reinstalling BOINC
This is how I solved it.
First, generate a new RPC password using:
# Generate new RPC password sudo apt -y install pwgen pwgen 30 1 | sudo tee /etc/boinc-client/gui_rpc_auth.cfg # Fix some permissions sudo chown root:boinc /etc/boinc-client/gui_rpc_auth.cfg sudo chown root:boinc /var/lib/boinc/gui_rpc_auth.cfg # Add current user to BOINC group sudo usermod -a -G boinc $USER # Restart BOINC client sudo systemctl restart boinc-client
After that, retry restarting boincmgr
. If the error still persists, reboot and retry!