Troubleshooting • Re: fresh install bullseye on pi3, disable-bt causes sysrq; HELP

I was meaning works, when disabling doesn't.
Disabling does the same swap giving gpio to ttyAMA0 and doesn't enable the BT on ttyS0.

I see what you mean. I just noticed something else that's pretty strange: I have a Monarco Hat attached and have unsuccessfully been trying to get the RTC and 1-Wire interface it provides to work. I downloaded the Rexygen "Bookworm" image that they provide and had a poke around to see how they configure their system, thinking that since it's an official PiOS image made specifically for use with the Monarco Hat there may be some clues in there. Their boot config.txt contains:
So I thought I'd give some of that a try, though having commented out both i2c and spi my /dev still contains spidev0.0 and 0.1 as well as i2c-0, 1, 10 and 11 - and I can still see the accelerometer I've got hanging off i2c-1. What!? I thought I just disabled the i2c interface, how come it still works!? It seems the boot config.txt settings are no longer relevant? But if I put dtoverlay=disable-bt in there it sure has an effect, in that it renders the system unbootable, so it's not like they're completely ignored. The deeper I dig the more confusing this looks

Edit: In case anyone is suspecting the Monarco Hat is the culprit: no, it isn't, because I moved the card to a different Pi3B+ earlier which does not have one installed and the issue remained the same. And there are no Monarco Hat specific configs, software or drivers on the image.

Statistics: Posted by Lomax — Mon Sep 02, 2024 8:50 pm

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