Problems with u-boot-rpi on RPi Model B

[Peter Jeremy]

Earlier this year, I switched to using the rpi-firmware and u-boot-rpi
packages and am having a couple of issues.

1) u-boot-rpi-2017.09.00_1 won't autoboot.  printenv reports that both
bootdelay and bootcmd are correct but it boots to a U-Boot prompt.  Adding
a print statement to boot.scr shows that it's not read until I enter "boot"
at the prompt.

2) u-boot-rpi-2018.03 won't run at all.  The screen stays blank and the
green SD-card activity flashes every second or two.  I've tried this with
both rpi-firmware-1.20180328 and an older version.  Switching to the older
u-boot-rpi on the same SD-cards works.

Can anyone offer any suggestions on how to get autoboot to work with u-boot?

-- 
Peter Jeremy
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