MediaTek Mt7612U (Alfa AC1200 )

[rlyacht]

I just got this wifi adaptor to use in my Intel NUC; my hw-probe is here.

I'm running Ubuntu 22.04.1, so I thought it would work out of the box, but it didn't.  Finally I got it to work with modprobe mt76x2u.  But now that it works, the speed I'm getting is awful.  Much worse than the wifi nic that is built in to the NUC. 

That's weird, isn't it? I was expected it to be lots faster.  I haven't done this kind of stuff in a long time! Are there some magical settings I need to apply to this thing?  FWIW, here's what I get from iwconfig

wlx00c0cab14c35  IEEE 802.11  ESSID:"Fios-DnfR3-5G2" 
          Mode:Managed  Frequency:5.28 GHz  Access Point: 04:A2:22:F4:ED:40   
          Bit Rate=520 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=38/70  Signal level=-72 dBm 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:2  Invalid misc:83   Missed beacon:0