I have a couple of Raspberry Pi 4Bs with a couple of different GPS HATs. Both GPS HATs work similar - they use the main serial port pins to transmit the NMEA sentences, several every second once they have GPS sync. Since u-boot stops on serial input, this keeps them from booting unattended. With a fresh Fedora 41 install, I see u-boot start and then get the EFI boot menu, which stops until I hit ENTER when the GPS HAT is attached. I tried setting bootdelay to -2 but that seems to stop the EFI boot menu from autobooting no matter what (e.g. pulled the HAT off and it still stopped there). I also changed stdin/stdout/stderr to remove serial, that didn't seem to have any effect. I assume people don't have these problems with the "official" Raspberry Pi OS - do they build u-boot with different options from Fedora that allow fully disabling the u-boot serial console mode? -- Chris Adams <linux@xxxxxxxxxxx> -- _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/arm@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
