La mayoria de los errores de firmware han desaparecido, pero todavía me falta el fichero "brcmfmac43241b4-sdio.clm_blob" que no lo encuentro por ningun lado:
[ 5.155659] Bluetooth: hci0: BCM: chip id 84
[ 5.156196] Bluetooth: hci0: BCM: features 0x0f
[ 5.157324] Bluetooth: hci0: BCM4324B3
[ 5.157329] Bluetooth: hci0: BCM4324B3 (002.004.006) build 0000
[ 5.158058] bluetooth hci0: firmware: direct-loading firmware brcm/BCM4324B3.hcd
[ 5.176800] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43241b4-sdio for chip BCM4324/5
[ 5.176848] brcmfmac mmc0:0001:1: firmware: failed to load brcm/brcmfmac43241b4-sdio.clm_blob (-2)
[ 5.176859] firmware_class: See
https://wiki.debian.org/Firmware for information about missing firmware
[ 5.176866] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available
[ 5.177153] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4324/5 wl0: Jul 17 2013 07:36:07 version 6.10.197.71 (r412987) FWID 01-882d2634
En Google no aparece por ningun lado, es un poco raro.
Sigo buscando.
Un saludo.