Hi all,
Have just bagged myself a new 5ghz WiFi dongle for my rpi4, yes I know it already supports that but the internal one is very weak on 5ghz, it is supposed to work on Linux and rpi, yet I can’t find a driver that does work, it’s based on the RTL8821 BU chipset, and there are many drivers on git hub but none of them work with the latest raspbian kernel....
Does anyone have any ideas...
Thanks

I don't find the internal 5GHz on the RPi4 to be weak. It is giving me better transfer rates than my Zotac miniPC. I get 433 Mps at at distance of ~15 m.

I don’t get anymore than 200mbps however close it is....
I would love to know how you get those speeds as you must be the only one....what mods have you made as the PI4 does not produce speeds like that natively...?

No specific modifications using Pi4 WiFi on the chip only (no external dongle or other connection). I am running my Pi4 with Ubuntu MATE installed and booted from SSD, installation done the way I described here repeatedly. Very stable OS. KStars used to crash once in a while, but I have high hopes that that has stopped with the memory leak fix Radek and Jasem plugged a couple of weeks ago.

Here a screenshot I just took to demonstrate the speed. That is indoors, with 2 walls between the Pi4 and the router. Outdoors with unobstructed line of sight using a WiFi extender I get 433 Mbps from a distance of ~ 60ft.

try this

Thanks, I will give it a try, but mine requires rtl8821bu and this is for the rtl8821ce version....

This is the error I get every time I try to install any compatible driver....

Maybe missing linux headers?

Thanks for that will give it a try....
I wondered if the error above was something to do with DKMS..
Also the Wi-Fi adapter is listed under lsusb...? So what does that tell me...??

No good, get this error with that..

Q: What exactly isn't working for you? Does it show up as a device in edit connections?

No it does not, the device does not show anywhere other than if I run Lsusb...then it’s listed there....so the Wi-Fi adapter does not work, and I have tried multiple versions of the correct driver, and none of them work and throw this error...