uEnv.txt not read?

sndwvs · 04-25-2022, 11:52 AM

Quote:

Originally Posted by pchristy

One other interesting thing, and one other question, if I may? When I fired up the machine today, the cma error messages had disappeared! I can only assume that a reboot wasn't enough to clear the old memory, and it needed a full shutdown - wait a while - and then restart to clear! (This is with "dtoverlay=vc4-kms-v3d,cma-512")

everything is possible because there is an OS firmware that controls a lot.

Quote:

Originally Posted by pchristy

The other question is that since uEnv.txt is called by uBoot, how does this configuration get done when booting the kernel directly, without uBoot?

uEnv.txt only uses the u-boot loader. config.txt uses the standard rpi loader and sequence first rpi loader then u-boot.

Quote:

Originally Posted by pchristy

Oh, and one final thing: Probably the reason that "dtoverlay=enable-bt" didn't work is that I can find no such overlay on my machine! Where should it be?

Yes, my mistake in the latest kernels is that there is no such file in overlays.

pchristy · 04-25-2022, 12:06 PM

Cheers!

--
Pete

sndwvs · 04-25-2022, 12:10 PM

for the test, I compiled a legacy kernel 5.15.34

pchristy · 04-25-2022, 01:43 PM

Gave it a quick try. Still no wifi, and I can't see an enable-bt overlay anywhere obvious.

Will investigate in more detail tomorrow....

--
Pete