Hi Tom, > FWIW, I tried to replicate this locally on my own RPi3B+, using > current Ubuntu 20.04.4 LTS (GNU/Linux 5.4.0-1066-raspi aarch64). > No luck: it all works fine for me. We have at least one Raspbian > buildfarm animal too, and it's not been unhappy either. I suspect > there is something odd about your environment settings.
Thanks for sharing this. I repeated the experiment in a clean environment (Raspbian installed from scratch on a brand new SD-card) and can confirm that the problem is gone. Sorry for the disturbance. -- Best regards, Aleksander Alekseev