Hi guys,
I bought a Linksys WUSB6300 Wifi dongle for my RPI 3 just to get 5GHz as I’ve been experiencing stuttering on some videos with high bitrates. This dongle uses a Realtek RTL8812AU chipset and for that there is a RPi compatible driver.
But I noticed that it was recognised directly and showed up as wlan1 in RasPlex, nice! (I saw on GitHub that a driver had been added a while ago)
But unfortunately it only sees 2.4GHz wifi’s, I’ve played around with every 5GHz mode DD-WRT has available but no luck 
Could it be an old driver?
Have anyone got this working?
I’d suggest working around/avoiding the driver support issue altogether and just getting a wireless-RJ45 client adapter (many routers can be configured to operate in this mode, or you can just get a dedicated device). Bonus is you could connect it to a switch and provide wired network access to other devices in your AV stack that might not be wireless-enabled.
I did this for years until I recently ran a real network run to that wall where the TV and AV equipment are. It handled my Dish DVR, my BD player, my AVR, and other stuff.
@ZyberSE Are you sure it’s not just still using the 2.4ghz onboard WiFi adapter instead of the new one? You may want to disable the onboard WiFi drivers using the blacklist to see if your dongle loads properly.
This is untested as my rPis are in use and un-tinkerable at the moment.
To Blacklist edit this file:
/etc/modprobe.d/raspi-blacklist.conf
With these lines:
#wifi
blacklist brcmfmac
blacklist brcmutil
#bt
blacklist btbcm
blacklist hci_uart
You could also temporarily disable the wlan0 with this SSH command:
sudo ifdown wlan0
I could test that, but in the list I see clearly both wlan0 and wlan1.
I did disable the onboard wifi but could still only see my 2.4GHz wifi, though it’s twice as fast at about 70MBit download (from a lan nas).
Still I would like to figure out how to get it to connect to my 5GHz?
