So what kind of speed are you expecting?
At least not so asymmetric internet channel.
On Windows 7 there was
40/40 (22MHz channel width)
nearly 80/80 (40MHz channel width)
Now i have 40Mbit/s with new kernel module, thanks to
aus9, but only in one direction. From client to router.
In other direction speed is still 5Mbit/s
I will test connection stability, but seems it will be OK.
I Just have unpluged the power connector, wait a couple of minutes and powered on again the router. After it 1/10 became 5/40.
Sounds like a magic, but simply
poweroff not change perfomance.
All of them, who has the same problem use
rtl8821ae in client mode, and stable 40/5 Down/Up speed is good enough for internet surfing. So they are found problem solved.
Ufortunately for me situation is the opposite. In that case old adapter with 20/20 more usable that new with 5/40 (or even 5/80);