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I've noticed something that I can't explain: I had this line in dmesg

bluetooth hci0: Direct firmware load for brcm/BCM43142A0-04ca-2009.hcd failed with error -2

This file doesn't exist so I've downloaded it and put it in /lib/firmware/brcm .

After, this error disappears from dmesg. As bluetooth doesn't work, I removed this .hcd file and I don't understand why this error doesn't reappear now. It's like this firmware is copied somewhere.

I found https://www.kernel.org/doc/html/latest/driver-api/firmware/core.html but fw_path_para parameter seems to be not defined for the broadcom bluetooth module (doesn't appear in btbcm), I can't write in /sys/module/firmware_class/parameters/path (even logged as root), and I don't understand well the part "Firmware cache" of the link.

Does someone can explain that?

Thanks

(sorry for my bad english)

1 Answers1

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Looks like your firmware might be missing or corrupted. I had a similar problem which got fixed once I followed Yadnesh's answer.

  1. Find firmware file BCM43142A0-04ca-2009.hcd from this git repository and add it to /lib/firmware/brcm/.

  2. Run the following commands:

    sudo modprobe -r btusb

    sudo modprobe btusb

  3. Reboot your machine.

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