On Wed, May 05, 2021 at 06:14:52PM +0000, Martin wrote:
> Hi list,
>
> I use AR9280 PCIe card in AP mode for about two years in Lenovo x230 laptop
> (whitelist removed). Works perfectly.
>
> After moving to a modern laptop there is no ability to install PCIe card into
> it.
> I tried to use one of USB dongles I have based on:
> 1. AR9280+AR7010
> 2. AR9271
>
> After attaching AR9271 USB dongle and restarting it by '/etc/netstart athn0'
> It broadcasts BSSID, and client can get IP address from it. But no data flow
> between USB AP and any client device connected. Most frames are dropped or
> corrupted on the 'air' level even USB AP and client on the same table.
>
> ICMP between AP and client goes with huge delays in both ways, most packages
> drop. Delay is about ~3.5ms but sometimes 337.3ms and more.
>
> The same issue with both USB dongles on x230 laptop (original PCIe was
> removed and nothing changed in configuration of PF and /etc/hostname.athn0).
>
> I tried three computers with OpenBSD 6.9amd64 GENERIC installed. The
> behaviour is the same with USB AR9280+AR7010 and AR9271 dongles.
>
> Once I return back PCIe version of AR9280 card all works like a charm.
>
> It looks like a bug in athn(4) driver related USB based devices.
>
>
> Martin
What you are seeing does not match what I see with this device
plugged into an APU2 board:
athn1 at uhub0 port 4 configuration 1 interface 0 "ATHEROS UB91C" rev 2.00/1.08
addr 2
athn1: AR9271 rev 1 (1T1R), ROM rev 15, address 00:c0:ca:xx:xx:xx
tcpbench sending to an iwm client associated to athn1:
$ tcpbench 192.168.1.2
elapsed_ms bytes mbps bwidth
1000 2195168 17.561 100.00%
Conn: 1 Mbps: 17.561 Peak Mbps: 17.561 Avg Mbps: 17.561
2011 2264672 17.938 100.00%
Conn: 1 Mbps: 17.938 Peak Mbps: 17.938 Avg Mbps: 17.938
3012 2292184 18.337 100.00%
Conn: 1 Mbps: 18.337 Peak Mbps: 18.337 Avg Mbps: 18.337
4014 2274808 18.162 100.00%
Conn: 1 Mbps: 18.162 Peak Mbps: 18.337 Avg Mbps: 18.162
5016 2231368 17.815 100.00%
Conn: 1 Mbps: 17.815 Peak Mbps: 18.337 Avg Mbps: 17.815
6017 2228472 17.828 100.00%
Conn: 1 Mbps: 17.828 Peak Mbps: 18.337 Avg Mbps: 17.828
7017 2200960 17.608 100.00%
Conn: 1 Mbps: 17.608 Peak Mbps: 18.337 Avg Mbps: 17.608
8023 2293632 18.240 100.00%
Conn: 1 Mbps: 18.240 Peak Mbps: 18.337 Avg Mbps: 18.240
9023 2274808 18.198 100.00%
Conn: 1 Mbps: 18.198 Peak Mbps: 18.337 Avg Mbps: 18.198
^C
--- 192.168.1.2 tcpbench statistics ---
21104600 bytes sent over 9.393 seconds
bandwidth min/avg/max/std-dev = 17.561/17.965/18.337/0.267 Mbps
I'd suggest you try your adapters on some different machines that
use different USB host controllers. There are known issues with
these devices on some controllers which I believe relate to (lack of?)
USB power management in the USB stack, though I don't know for certain.
In some known cases the firmware wouldn't even boot.
Cheers,
Stefan
