Rpi3 boots, reaches login but no Wifi

[Fernando Correa Neto]

Hey there

After successfully booting up the Rpi3 image and trying to setup wifi, I
noticed the following error:

[   15.468298] brcmfmac_sdio mmc1:0001:1: Direct firmware load for
brcm/brcmfmac43430-sdio.bin failed with error -2
[   16.210654] systemd-journald[475]: Received request to flush runtime
journal from PID 1
[   16.473872] brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50
[   17.279125] cfg80211: World regulatory domain updated:
[   17.279149] cfg80211:  DFS Master region: unset
[   17.279159] cfg80211:   (start_freq - end_freq @ bandwidth),
(max_antenna_gain, max_eirp), (dfs_cac_time)
[   17.279175] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A,
2000 mBm), (N/A)
[   17.279187] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A,
2000 mBm), (N/A)
[   17.279199] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A,
2000 mBm), (N/A)
[   17.279214] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000
KHz AUTO), (N/A, 2000 mBm), (N/A)
[   17.279229] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000
KHz AUTO), (N/A, 2000 mBm), (0 s)
[   17.279242] cfg80211:   (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A,
2000 mBm), (0 s)
[   17.279254] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A,
2000 mBm), (N/A)
[   17.279266] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz),
(N/A, 0 mBm), (N/A)
[   17.488436] brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50


Scanning the web I've found that when that happens, it's either because of
an old firmware or a missing .txt that should be sitting right next to the
firmware blob, in this case brcmfmac43430-sdio.txt
Checking Rpi3's /lib/firmware/brcm, there's no .txt.

I wonder what are my options there. What's the recommended way for testing
a simple file placement followed by rmmod/modprob in a snappy world?

Regards,
Fernando
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