On Thu, 11 Feb 2021 at 22:37, Long Wind <longwi...@yahoo.com> wrote:
>
> Thank David! below is your requested output by ubuntu and debian
> but link/level in debian is above 50, it's ok, i'm afraid it offer little
> clue to my problem
> output by ubuntu:
> zhou@zhou-Lenovo:~$ iw dev wlx502b73d50a69 link
> Connected to 06:74:9c:9b:f9:99 (on wlx502b73d50a69)
> SSID: JHotel
> freq: 2462
> signal: -41 dBm
> output by debian:
> root@debian:~# iw dev wlx502b73d50a69 link
> Connected to 06:74:9c:6e:ca:6a (on wlx502b73d50a69)
> SSID: JHotel
> freq: 2412
> signal: -53 dBm
It looks like you have 2 access points (AP) near you on the JHotel network.
Ubuntu is connecting to an AP using channel 11 (2462 MHz) at -41dBm
signal strength.
This is a good signal strength.
Debian is connecting to an AP using channel 1 (2412 MHz) at -53dBm
signal strength.
This is weaker than the other channel and will have worse performance.
I suggest you try to configure Debian to use channel 11.
You should look how best to do this on your computer.
On my computer (yours might be different) I would do it like this:
In the file /etc/wpa_supplicant/wpa_supplicant.conf there will be
something like:
network={
ssid="JHotel"
...
}
Add a line to specify the channel frequency like this.
network={
ssid="JHotel"
frequency=2462
...
}
The goal is that when you run
# iw dev wlx502b73d50a69 link
you want to see:
freq: 2462
Do NOT post your wpa_supplicant.conf file here,
because it contains private password information.
Some basic explanation:
https://www.metageek.com/training/resources/why-channels-1-6-11.html
https://www.metageek.com/training/resources/wifi-signal-strength-basics.html
