error with driver in a raspberry pi4 Raspbian; how to overwrite with a better one?
 

hello,
following errors appear in the dmesg; how to get rid of it? any advice is welcome (dont disturb for now; just the red color disturb a bit).
Thanks a lot.
dmesg

Ah, that's a familiar name, as I had my own issues there. It's in /lib/firmware/brcm/. Is the wifi working? I'm on RazPi OS, I see you're on Ubuntu. A kernel firmware upgrade might sort it. That's done every time you upgrade the kernel firmware. Razpi OS has patched firmware, so I can't really help you more

Thanks.
I dont use wifi on that raspberry. It will be a small server for testing an expert system accessible via web interface. its reachable via ssh.
In /lib/firmware/brcm/ are several files. Perhaps I should download the
from anywhere (where? how?) and just overwrite?

Update: according https://www.raspberrypi.org/forums/v...c.php?t=225906
works
gives insmod: ERROR: could not insert module /lib/modules/5.10.7-v7+/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko: Invalid module format
and dmesg show brcmfmac: disagrees about version of symbol module_layout
brcmfmac.ko is perhaps wrong and should be updated with a new one?

^ Don't use insmod/rmmod if you can use modprobe instead.

floppy_stuttgart, please use CODE tags for code and output, not quote tags. See my signature.

I assume you are refering to this line:
Here's a search for the edited error message - if your device has wifi hardware but you don't use it, you could blacklist the driver?

As I said

Since I did not know how to upgrade that firmware (all available raspbian standard upgrade were not working), I just blacklisted the module as indicated
and included the line
the error message is gone after reboot. All fine.
Thanks for the support.

Most probably i9t's from a different kernel version.

despite it works, I am searching for a better solution in case the wifi is used later (copy a working bin to the driver area).I will document my tries here.
here are some advices https://github.com/raspberrypi/firmware/issues/1403
any remark from anyone is welcome in case I am bullshitting here ;-)

Try a)
lets try the download of https://drive.google.com/file/d/1vz3...kUK3rh8fC/view
how to download a file ? see there https://stackoverflow.com/questions/...ive-using-wget and there https://www.matthuisman.nz/2019/01/d...wget-curl.html
0a45a7a828e49e20fee2fe0438149523 /lib/firmware/brcm/brcmfmac43455-sdio.bin
[ 5.111749] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: May 20 2020 00:36:51 version manifest (de496ab CY) FWID 01-12aa6092
sudo reboot
.. small "red" still there in dmesg output. But "error -2" gone. looks better.

Try b)
c4d098fdac7b453408341d5709481b10 /lib/firmware/brcm/brcmfmac43455-sdio.bin
[ 4.936618] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Mar 23 2020 02:19:54 version 7.45.206 (r725000 CY) FWID 01-88ee44ea
sudo reboot
.. error still there.. oh no. I was coming back to previous driver. Forget Try b.

Try c) .. perhaps to come. However, since I am not using wifi, I cannot test Try a) and "error -2" is gone. lets stop here for now.

I never got your error, but I did have wifi weirdness.

I got one of the arm-specific kernel releases periodically linked on the Slackware Arm list, which gave me the vanilla firmware blobs. I also had the installed RazPi (=Debian) firmware, which was different. The Debian one was bigger. But they both worked. I tested them.

I found it insensitive, slow, and the aluminium case I had it in as an alternative to some gutless, noisy and dead cheap fan actually acted as a Faraday shield and made the wifi slow. I think the wifi crowding locally prevented it being sensitive.I haven't looked back with an external one.

Haha. My pi4 server has a good looking aluminium case. https://www.reichelt.de/gehaeuse-fue...s_0&nbc=1&&r=1
it could be an issue? That would be no wonder for me, a wifi behind an aluminium shield. Good thinking; changing to a plastic case when I will use wifi.

For you or anyone else reading who may want to be rid of the wifi, bluetooth or audio on the install.


Will do it and my wifi worked out of the box on the default kernel in Raspian Buster, until I disabled it.

Edit: settings are made in the /boot/config.txt near the bottom for the audio and at the bottom for the wifi and bluetooth edits.

Fine. I will disconnect the whole internal stuff since I dont use it and it's damaged by the aluminium case.
Looks like my aluminium case is the worst of all for the PI 4 wifi behaviour; see link/analysis below (no wonder.. metal around wifi.. the dead of wifi).
So, if the PI 4 should have a multipurpose use, my recommendation would be NEVER BUY A METAL CASE if the internal wifi should be used (an additional external wifi is possible anytime).
https://www.martinrowan.co.uk/2019/0...ry-pi-4-cases/

I have the Flirc case for my Pi 4, and started with 500Kbps to 2Mbps. The Flirc case has 5 metal sides and one plastic one. By pointing the plastic in the (nearest to) line of sight, I got a significant improvement Not only has inbuilt wifi a lower capability, but it also has less sensitivity. Th neuter it, in /boot/config.txt, add

So it works like a "cantenna", possibly even boosting the signal? Clever.

Not really, it nearly kills wifi unless you give it line of sight, then it acts as an attenuator. And it wasn't a fast wifi to begin with. The Pi is too small to have it's own wifi aerial, with digital tracks adjacent to the aerial on 2 layers.