A RTL8822BE using rtw88 in a Thinkpad A275 has some connection issues similar to #199217 - although the FritzBox 7590 reports a 390Mbit connection, even SSH connections are sluggish. And also like in #199217, the invalid misc counter increases every few seconds. The throughput tested with iperf3 is around 20/30 Mbit in good times, but after some time reduced to 100-200kbit. I don't know which router was used in #199217, but I don't think a FritzBox 7590 is that crappy hardware and other devices don't have that issues.
I've tested now with the LTS kernel 4.19.87 which still uses r8822be. Connection speed is shown as 866Mbit in AC mode, iperf throughput as follows: [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 27.0 MBytes 226 Mbits/sec [ 5] 1.00-2.00 sec 29.2 MBytes 245 Mbits/sec [ 5] 2.00-3.00 sec 29.9 MBytes 251 Mbits/sec [ 5] 3.00-4.00 sec 30.1 MBytes 252 Mbits/sec [ 5] 4.00-5.00 sec 26.1 MBytes 219 Mbits/sec [ 5] 5.00-6.00 sec 19.8 MBytes 167 Mbits/sec [ 5] 6.00-7.00 sec 30.4 MBytes 255 Mbits/sec [ 5] 7.00-8.00 sec 31.7 MBytes 266 Mbits/sec [ 5] 8.00-9.00 sec 29.4 MBytes 247 Mbits/sec [ 5] 9.00-10.00 sec 28.2 MBytes 237 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.05 sec 284 MBytes 237 Mbits/sec 1 sender [ 5] 0.00-10.00 sec 282 MBytes 236 Mbits/sec receiver In comparison, throughput with rtw88: [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 4.02 MBytes 33.7 Mbits/sec [ 5] 1.00-2.00 sec 4.08 MBytes 34.2 Mbits/sec [ 5] 2.00-3.00 sec 4.12 MBytes 34.5 Mbits/sec [ 5] 3.00-4.00 sec 4.23 MBytes 35.5 Mbits/sec [ 5] 4.00-5.00 sec 4.18 MBytes 35.1 Mbits/sec [ 5] 5.00-6.00 sec 4.33 MBytes 36.3 Mbits/sec [ 5] 6.00-7.00 sec 4.30 MBytes 36.1 Mbits/sec [ 5] 7.00-8.00 sec 4.26 MBytes 35.7 Mbits/sec [ 5] 8.00-9.00 sec 4.37 MBytes 36.7 Mbits/sec [ 5] 9.00-10.00 sec 4.38 MBytes 36.7 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 44.2 MBytes 37.1 Mbits/sec 312 sender [ 5] 0.00-10.00 sec 42.3 MBytes 35.5 Mbits/sec receiver The much slower speed and the connection issues appear as a regression to r8822be.
Using Linux 5.8.8, with driver rtw88_8822be, I can reach 398.84 Mbit/s (results obtained with speedtest-cli).
Sorry for hijacking this. I had #209263 open (rtw88 lots of crashes), and whereas this is still true (very much so sometimes, otherwise not, loosing connections), but closed it sometime. For me it is still bluetooth-audio _or_ wlan, most of the time. wlan stalls to 0 throughput very often, stopping bluetooth audio restarts it. Speed slowly goes up thereafter. In general, sinus curve style download throughput. But all i wanted to note is that i get hearable stutter when rfkill is on for wlan but no connection there is, each time dhcpcd sends its packets, audio stutter occurs. Maybe someone can make something of this. Ciao (sorry again)