Wifi troubleshooting on Mesa 3 or Mesa 2
28 Apr 2020
Updated 28 Apr 2020, original content from 18 Jul 2019:
If Wifi appears to be missing or is no longer working properly on a Mesa 3 Windows or Mesa 2 unit, some possible solutions are as follows.
Tapping and hold on the Start menu (bottom-left Windows logo button) allows you to select Device Manager for viewing Network Adapters to then tap and hold on the "Broadcom 802.11ac Wireless PCIE Full Dongle Adapter" on Mesa 3 or “Broadcom 802.11abgn Wireless SDIO Adapter” on Mesa 2 for selecting “Disable device” and then “Enable device”.
Performing a Hard Reset may help. You must first tap on Start > Power > Shut Down, wait until this completes fully (such as the red light goes off after a minute or two), then hold the hardware Power button for 17-20 seconds, release then wait a few seconds, attach wall charger, briefly press the hardware Power button again, and wait for the unit to complete boot to then verify Wifi is functioning.
Device Manager could again be used for viewing Network Adapters to double-tap on the "Broadcom 802.11ac Wireless PCIE Full Dongle Adapter" on Mesa 3 or “Broadcom 802.11abgn Wireless SDIO Adapter” on Mesa 2 to open the Driver tab then select "Roll Back Driver". On Mesa 3, it can help to roll back from the Microsoft version 22.214.171.124 drivers to the Broadcom version 1.558.53.33 drivers. If you are able to Roll Back the driver, either immediately, or after manually installing the previous functional driver (as described below) then update driver then roll it back, that should set a flag in the operating system to prevent Windows Update from trying to update that driver in the future.
On Mesa 3, you may need to uninstall the device with deleting the driver then Restart to restore the original functional driver. If for some reason it is not immediately possible to roll back the driver or it does not automatically restore after Restart, then you can manually install the previous functional Wifi driver from the following file link.
If needed, a USB flash drive can be used to copy this BCM-4324.zip file to a Mesa 3 Windows unit. You must then extract the ZIP file, open Device Manager > Network adapters > Broadcom 802.11ac Network Adapter, select to Update Driver, then “Browse my computer for driver software”, then “Let me pick from a list of available drivers on my computer”, then “Have Disk…”, then “Browse…” to the folder containing the drivers, select the extracted “bcmwdidhdpcie.inf” file, tap Open, then OK. The correct model “Broadcom 802.11ac Wireless PCIE Full Dongle Adapter” will now be shown. Tap Next. When it has finished loading the good driver, tap Close. Wifi should now again be functioning. A reminder that you may want to update and roll back the driver to set the flag for possibly preventing any future unexpected driver change.
On Mesa 2, the Wifi drivers can possibly be updated or just reloaded from the following web page.