Launchpad Bug Tracker wrote:
> You have been subscribed to a public bug:
>
> Ubuntu 8.10.
>
> In Network Manager I have Intel Pro Wireless 3945ABG [Golan] and Belkin
> F5D7050 v4000. The built-in wireless card is useless more than about 6
> feet from the router, so I need the USB receiver.
>
> Sometimes Network Manager picks up a weak signal from the built-in card.
>
> The problem is that Network Manager occasionally shows the signal from
> the built-in card as very strong (even though the laptop has not moved.)
>
> Network Manager then tries to connect to the router via the built in
> card, prompts for a password and reports that the computer is connected
> when it isn't. Network Manager then seems to try connecting via the
> built-in and USB wireless simultaneously, with two requests for
> passwords and 'connected' messages when there is no connection. Network
> Manager then sometimes crashes completely.
>
> I could disable the built-in wireless card from the Windows partition in
> Ubuntu 8.04, but in 8.10 this results in 'Enable Wireless' being greyed
> out.
>
> To summarise the bug: the signal strength indicator for the built-in
> wireless card is occasionally reporting a very strong signal which does
> not exist. Network Manager does not seem to be able to handle two
> signals from the same router (one from the built-in card, one from a USB
> receiver) successfully.
>
> Maybe that's two bugs?
>
> I've attached a screen shot which shows Network Manager reporting a 100%
> signal from Intel Pro Wireless- when the laptop was 9m from the router,
> and an accurate reading would be ~5% signal strength at best- and both
> the Intel Pro Wireless 3945ABG [Golan] and Belkin F5D7050 v4000 buttons
> 'on', just before problems arose.
>
>   
i think there are multiple points here:

 1. you want finer control about enabling/disabling devices in NM
 2. also you have issues with the drivers as they report bad signal
strength ... which is in turn used by NM to find the best connection.
 3. also you might not like the idea thta NM automatically switches to a
"better" network, so you want a better policy.

which part do you want to use this bug for?

-- 
Internal and USB wireless conflict on laptop
https://bugs.launchpad.net/bugs/292531
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