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Troubleshooting • Re: lots of brcmfmac errors such as "brcmfmac: brcmf_sdio_isr: failed backplane access"

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Hi,
@ejolson Yes it could be hardware. I would have thought and hopes that soft/firmware would be sorted by now.

I'd set

Code:

arm_freq=600gpu_freq=300sdram_freq=400
in config.txt just after posting but I've not had time to test it since doing that.
I'll probably stress it in the morning.

Cheers
Andy
That looks like the right idea. I think the Zero 2 likely runs a lot faster by default. I mention this because different problems can happen when clocking too slow.

Statistics: Posted by ejolson — Thu Dec 18, 2025 4:13 am



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