Closed LorenzoAncora closed 5 years ago
The Raspberry Pi 3 B was loading the bcm2837
DTB instead of the correct device tree.
I've discovered that after removing it the device would not boot (stuck on the rainbow test screen) and I've edited config.txt
with an SD card reader, discovering that a script replaced the name of the correct device tree with device_tree=bcm2837-rpi-3-b.dtb
.
Replacing device_tree=bcm2837-rpi-3-b.dtb
with device_tree=bcm2710-rpi-3-b.dtb
in config.txt
and replacing bcm2710-rpi-3-b.dtb
with a previous version of itself solved the problem.
config.txt
. PITA.If you're using custom .dtb's, it may help to purge the raspi3-firmware package so that it can't overwrite things (I stumbled into this problem setting up my RPi too)
@jlu5 TY for you suggestion.
If you're using custom .dtb's
No, I am only using older versions of the official ones. Without doing that the kernel does not recognize the wireless interface and I cannot use Internet.
purge the raspi3-firmware package so that it can't overwrite things
This package contains all the proprietary files necessary to boot a Raspberry Pi® 3 board. Purging this package will remove those (proprietary) files:
/etc/kernel/postinst.d/raspi3-firmware
/usr/lib/raspi3-firmware/bootcode.bin
/usr/lib/raspi3-firmware/fixup.dat
/usr/lib/raspi3-firmware/fixup_cd.dat
/usr/lib/raspi3-firmware/fixup_db.dat
/usr/lib/raspi3-firmware/fixup_x.dat
/usr/lib/raspi3-firmware/start.elf
/usr/lib/raspi3-firmware/start_cd.elf
/usr/lib/raspi3-firmware/start_db.elf
/usr/lib/raspi3-firmware/start_x.elf
On paper it's not a bad idea but what are the secondary effects?
Problem
After entering the DTB files in the firmware directory, everything was fine and the wireless interfaces worked perfectly. Yesterday evening the electric power went out for ~2 hours and, when the board restarted,
wlan0
disappeared. After several reboots the situation is unchanged, even though the driverbrcmfmac
is in memory and is in use.Details
/boot/firmware
contains only two DTB files, the firmware configuration for boot and some kernel binaries.Related to: #37