Public bug reported:

Hi,

I'm using a public wifi network to access the internet (in the spirit of
FON - https://fon.com/). Let's name it XXX.

There are multiple access points with the same name that "offer" this
network. Many are in conflict with one another, using the same channel.
Also, each AP is regularly switching channel, so I cannot associate a
channel to a bssid and work with bssids instead of network name.

nm-applet manages this situation very badly:

- nm-applet seems to select the AP with the strongest signal, even if it
is in conflict with 10s of others APs, leading to a very bad connexion,
while still displaying an icon showing very good signal;

- Also, as a consequence of its selection, quite often, nm-applet
switches from one AP to the other, creating very instable situations,
leading to even worse connexions throughput;

- Trying to solve the problem, I saved the network, modified the
connexion manually to fix one channel (let's name it YYY1), saved the
connexion as "XXX-c[han]YYY1", then disconnected. Then I reconnected to
the network, but nm-applet seemed to have switched to another AP using
another chanel (YYY2), so I repeated the operation, and saved a
"XXX-c[han]YYY2" network. Now, nm-applet, in its list of available
networks, now randomly displays either simply "XXX", or at times "XXX >"
(with a triangular char showing that there are sunetworks available)
with "XXX-channelYYY1" are "XXX-channelYYY2" as sub networks. In the
second case, if I select the network with less/no channel conflict, then
the connexion is quite good and stable.

  > As can be seen in the attached picture, in the terminal, there are
many access points available for XXX network, several using channel 11
or 7. As can also be seen there are 2 saved networks in nm-applet "Edit
networks", one fixed to chan7, one fixed to chan11. However, nm-applet
just lists "XXX" in its list of available networks...

- Finally, there is no simple way in "Edit connections" to copy an
existing configuration, so I cannot easily create a connection for each
possible chanel. So, even if point above would be solved and nm-applet
always display the avaliable "XXX-c[han]YYY" sub networks, I cannot
simply create an entry for each channel and manually select the channel
that is less in conflict than the others, based on my script that lists
all the APs and the channels they use.

Does anyone has a solution to this kind of situation?

** Affects: network-manager-applet (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "nm-applet does not present saved networks as available"
   
https://bugs.launchpad.net/bugs/1865363/+attachment/5332360/+files/2020-03-01-190718_1600x900_scrot.png

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https://bugs.launchpad.net/bugs/1865363

Title:
  nm-applet unstable behaviour when multiple AP have the same name

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