DragonBoard410c - linaro-buster-alip-dragonboard-410c-359.img.gz download failed


#21

Hi Danielt,

Can you please find log in https://pastebin.com/6RJZ0ViL url.

Thanks in advance for your support.

Suguna.


#22

So there are several things that I notice in these traces.

  1. The UART does not always recover at the same point on the boot process
  2. We never see the initial kernel boot messages, nor the messages from the firmware
  3. Sometimes there are bad characters, other times there is nothing at all

Iā€™m afraid I do not think this is a problem with the DB410C (due to the differing recovery points). I think it is more likely that your PC is misconfigured and there are two processes trying to access the UART at the same time. You might be able to prove this if you can run sudo lsof during the short window the UART is not working.

If you have ModemManager installed then it may be responsible for this. The exact behaviour depends on what UART adapter you have and how old your distro is. If you are affected you can either disable modemmanager entirely or use udev rules to prevent it from probing the DB410C to find out if it is a modem: http://microzed.org/content/usb-uart-problem