[Solved] WiFi on Pi3 killed after upgrade to Stretch

[iulius_felix]

I've got the Respbian Lite on my Pi3 updated to Stretch last night (add the stretch source then do the apt full-upgrade), but found I've lost my WLAN interface afterwards.

After run the rpi-update, now my Pi3 is on 4.4.12-v7+ #892, but the WLAN interface still missing and there are some brcmfmac related kernel massage:

Code: Select all

[    4.931879] brcmfmac: brcmf_sdio_drivestrengthinit: No SDIO Drive strength init done for chip 43430 rev 1 pmurev 24
[    4.932451] usbcore: registered new interface driver brcmfmac
[    4.957749] brcmfmac_sdio mmc1:0001:1: Direct firmware load for brcm/brcmfmac43430-sdio.txt failed with error -2

I thought that could be firmware problem, but install the firmware files from https://github.com/RPi-Distro/firmware-nonfree/tree/master/brcm80211/brcm to /lib/firmware/brcm does not fixed the problem.

Then I found in README of DT overlay, it says:

Name: sdhost
Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock.
N.B. This overlay is designed for situations where the mmc driver is
the default, so it disables the other (mmc) interface - this will kill
WiFi on a Pi3. If this isn't what you want, either use the sdtweak
overlay or the new sd_* dtparams of the base DTBs.
Load: dtoverlay=sdhost,<param>=<val>

but seems neither putting dtoverlay=sdtweak in config.txt nor using dtoverlay sdtweak command works for the issue.

Any suggestion will be appreciated, thanks in advance!

[DougieLawson]

Build a fresh SDCard with a copy of NOOBS 1.9.2 or Raspbian 2016-05-27.

With a USB SDCard reader you can then pull your valuable data and programs from the old SDCard.

[iulius_felix]

Hi,

Thanks for the reply, but I managed to solve the problem by coping two firmware from Ubuntu, they are:

Firmware version = wl0: Dec 15 2015 18:10:45 version 7.45.41.23 (r606571) FWID 01-cc4eda9c

4a410ab9a1eefe82e158d36df02b3589 brcmfmac43430-sdio.bin
8c3cb6d8f0609b43f09d083b4006ec5a brcmfmac43430-sdio.txt


After that I found out that the firmware I downloaded from Github was corrupted.

[wdmjun]

Same problem here. Upgraded raspbian jessie to raspbian stretch on pi3 and lost wifi (due to the upgrading of firmware-brcm80211 package). Just copied the contents of /lib/firmware/brcm from raspbian jessie (from another pi) and rebooted. Now wifi works on pi3 with raspbian stretch.

[elkberry]

This issue is still present: I needed to upgrade to Stretch and lost wlan0 on its way. This post saved my day: I copied the firmware blobs from one of my backup USB thumbdrives, rebooted, and wlan0 worked again.

[schallee]

Make sure the firmware-brcm80211 package is installed. Though still on jessie, somehow the firmware files disappeared and this package was not installed. Oddly they must have been there before because it worked for a long time until a update and reboot. Installing it fixed the issue.

[elmicha]

Thank you, schallee!

I did have the latest version of firmware-brcm80211 installed, but wlan0 still didn't show up.

Code: Select all

sudo apt remove firmware-brcm80211
sudo apt install firmware-brcm80211

and it worked.

[iamhssingh]

Can you post a link to those files? I am facing the same problem and have been searching for a solution but last 48 hours resulted in no success. I do have a WiFi USB that works like a charm, but really need the internal one to work.

Thanks.

[elmicha]

http://raspbian.raspberrypi.org/raspbia ... u1_all.deb

But if your Pi has an internet connection you don't need to download the file manually, just use apt.