Without arguments, ipp-usb runs in the foreground, so the service type should be set to simple instead of oneshot.
[Service] Type=simple ExecStart=/sbin/ipp-usb udev -- Jindřich Makovička
Without arguments, ipp-usb runs in the foreground, so the service type should be set to simple instead of oneshot.
[Service] Type=simple ExecStart=/sbin/ipp-usb udev -- Jindřich Makovička