On 22-07-17 20:43, Hans de Goede wrote: > The real culprit here seems to be: > > jul 22 14:13:23 localhost.localdomain kernel: brcmfmac: > brcmf_sdio_hostmail: Unknown mailbox data content: 0x40012 So I dug a little deeper in our firmware and as it turns out it is indeed a firmware halt which is indicated by 0x10. 0x02 is DEVREADY and 0x40000 indicates the protocol version. Regards, Arend