Hi Terry, > sudo systemctl disable serial-getty@ttyAMA0.service > > but it doesn't seem to work, I still get the login prompt.
It's hard to say because the systemd units configured will be specific to Debian, or even Raspbian, and I think the names of the serial ports, e.g. ttyAMA0, have changed between models because they nicked the SoC's real UART for talking to Bluetooth, or something, and substituted bit-banging in its place that has flaky timing depending on CPU-speed changes. There the rumours I've heard, anyway, I'm out of touch with Pi stuff. `disable' stops it starting on booting rather than stopping it now. `mask' blocks it from starting either manually, or as a dependency of something else that's starting. `systemctl | grep getty' will show the systemd units, etc., involved in your system. And http://0pointer.de/blog/projects/serial-console.html suggests your simplest bet would be to alter the kernel's parameters so systemd doesn't want to start a getty. -- Cheers, Ralph. -- Next meeting: BEC, Bournemouth, Tuesday, 2019-04-02 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
