Open edmonds opened 4 years ago
FWIW, it looks like my issue is caused by https://github.com/raspberrypi/linux/issues/2406, which appears to be either a bug in the kernel's ftdi driver on ARM platforms, or a bug in the USB controller on Raspberry Pi systems. I swapped out my Raspberry Pi 4 for a 3B+ and the ftdi hangs started occurring every few minutes. Adding dwc_otg.speed=1
to the kernel command line appears to fix the issue but limits the USB controller to USB 1.1 speeds.
Hi,
I have a receiver (https://galmon.eu/observer.html?observer=74) that will occasionally hang and stop generating serial data. This typically occurs a few times a week. When it happens kernel messages like these are generated:
This is on a Raspberry Pi 4 and I don't see the same issue on my desktop, so it's probably a hardware issue.
Closing and re-opening the serial port appears to clear the problem. My current workaround is to restart the ubxtool process every hour or so (e.g.
RuntimeMaxSec=3600
in the systemd service unit), but I'm wondering if it might make more sense to have a watchdog option in the ubxtool process itself that exits the main loop if a message hasn't been received in a reasonable amount of time (e.g., 5–10 minutes?).Thanks for considering!