Big Sur 11.3.1: Wifi network max speed reduced

[Ribero]

On a MacBook Pro 10,1 with upgraded WiFi card the connection speed to a 5ghz network was set at 867Mb on BS 11.3 which is the maximum allowed by the wifi hotspot I connect to.

After upgrading to 11.3.1:

• The maximum rate I can connect to the same hotpot is now 400mb (probably like macbook10,1 WiFi Problem #170)
• I'm facing the BT + Wifi 2.4Ghz issue (cf BCM943224 and BCM94331 2.4Ghz Network connection issues with Bluetooth #173) (It looks like it worked as expected in 11.3)

I'm using OLCP 0.1.2 (no additional/specifc config)
my Wifi card (ioreg -r -n ARPT | grep IOName) = pci14e4,43ba (BCM43602 802.11ac Wireless)

[khronokernel]

The maximum rate I can connect to the same hotpot is now 400mb (probably like #170)

Hmm, can you try disabling AirportBrcmFixup in your config.plist? Wondering if only the BCM4360(non-02) variant should use it

[Ribero]

Well, well, well
I double checked and tried to another hotspot (same brand, same model) and I was able to catch it at 867Mb.
Then I forced this hotspot to provide only 2.4Ghz and I was still able to connect and use BT... The problem is not consistent.

I need to do the test at office as hotspot their are more difficult to connect to and only in 2.4Ghz.

Sorry I may have raised a non issue.

[khronokernel]

No worries, if you find it to be an OCLP issue then just mention. Will reopen accordingly

[mav2010]

Even though this is closed: I had the same issue. I upgraded the Wifi/Bluetooth Card in my MacBook Pro 10,1 to the same card as mentioned above: (ioreg -r -n ARPT | grep IOName) = pci14e4,43ba (BCM43602 802.11ac Wireless)

Running OpenCore Legacy Patcher in standard mode, it enabled the AirportBrcmFixup even though it is not needed. And then I also faced the 400 MBit/s maximum connection speed issue. Setting AirportBrcmFixup to Disabled in the config.plist after building, I am back to the expected 1.300 MBit/s maximum connection speed.

Can you possibly introduce a detection that does not enable AirportBrcmFixup, when the above mentioned WiFi Card is detected. I think quite a lot of people have done that upgrade to obtain AC connectivity.

Edit: fixed in 0.2.5, respectively in the bundled AirportBrcmFixup.