Re: ALFA RTL8812au connection is unstable.

From: Bjoern A. Zeeb <bzeeb-lists_at_lists.zabbadoz.net>
Date: Wed, 01 Nov 2023 13:53:14 UTC 
On Wed, 1 Nov 2023, Laurent Cimon wrote:

> Hello,
>
> I have an RTL8812au card on FreeBSD 14.0-STABLE and the connection is very 
> unstable.
> For example, when downloading packages with pkg, the download rate goes down 
> to 0
> for a few seconds, then goes up not above 2MB/s for a few seconds, it's often 
> under 500KB/s
> and often does not last longer than a second or so, then goes back to 0 for a 
> few seconds.
>
> I haven't felt this instability when browsing the web or pinging, it seems to 
> happen during longer connections.

How many networks are in your neighbourhood?

ifconfig wlan0 list scan

will tell to some degree.

/bz



> Here are some system information. I've tried changing a few tunables but 
> nothing changed.
>
> root@JOY# sysctl -a | grep rtwn
> rtwn0 on uhub3
> rtwn0: <Realtek 802.11n NIC, class 0/0, rev 2.00/0.00, addr 2> on usbus5
> rtwn0: MAC/BB RTL8812AU, RF 6052 2T2R
> <118>   parent interface: rtwn0
> net.wlan.0.%parent: rtwn0
> net.wlan.devices: rtwn0
>         value:  /boot/kernel/rtwn-rtl8812aufw.ko
>         value:  /boot/kernel/if_rtwn_usb.ko
>         value:  /boot/kernel/rtwn.ko
> dev.rtwn.0.rx_buf_size: 48
> dev.rtwn.0.ratectl_selected: 1
> dev.rtwn.0.ratectl: 2
> dev.rtwn.0.hwcrypto: 1
> dev.rtwn.0.debug: 0
> dev.rtwn.0.ht40: 0
> dev.rtwn.0.%parent: uhub3
> dev.rtwn.0.%pnpinfo: vendor=0x0bda product=0x8812 devclass=0x00 
> devsubclass=0x00 devproto=0x00 sernum="123456" release=0x0000 mode=host 
> intclass=0xff intsubclass=0xff intprotocol=0xff
> dev.rtwn.0.%location: bus=5 hubaddr=1 port=2 devaddr=2 interface=0 
> ugen=ugen5.2
> dev.rtwn.0.%driver: rtwn
> dev.rtwn.0.%desc: Realtek 802.11n NIC, class 0/0, rev 2.00/0.00, addr 2
> dev.rtwn.%parent:
>
> Thank you,
> Laurent
>
>

-- 
Bjoern A. Zeeb                                                     r15:7