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Linux Boot Log

Start by checking that the module has been detected. For modules with Infineon/Cypress chipsets:

dmesg | grep brcm
brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: May 14 2018 04:48:55 version (r689896) FWID 01-9d634183

For modules with NXP chipsets:

dmesg |grep -i "lan"
wlan: Loading MWLAN driver
wlan: Enable TX SG mode
wlan: Enable RX SG mode
Wlan: FW download over, firmwarelen=537492 downloaded 537492
WLAN FW is active
wlan: version = SD8987---16.92.10.p73-MX4X16169-GPL-(FP92)
wlan: Driver loaded successfully

If the command does not return something similar to the lines above, then make sure that

  1. the module is inserted correctly and
  2. that the correct device was chosen when running