Re: Slow wifi-reconnection when waking up

[Dan Ritter <dsr@randomstring.org>]

Stefan Monnier wrote: 
> When I wake up from suspend, my Debian machines take a "long" time to
> reconnect to the wifi.  Looking at the `nm-applet` icon in my XFCE4
> panel, I see:
> - for about 10s the icon is "two computers" (which IIUC represents
>   just NetworkManager).
> - then the icon changes to the one representing a wired ethernet
>   connection and stays that way for about 10s (there's nothing
>   plugged into the ethernet port of this computer).
> - then the icon changes to the "two dots, with something circling
>   between them" which indicates that the system is in the process of
>   connecting to a wifi network.
> - after about 5s this changes to the bars representation of the
>   signal quality.
> 
> IOW, while it takes about 5s to connect to the wifi network, it takes
> about 20 additional seconds for NM to decide that it should try to
> connect.
> 
> I have the impression that a few years ago, my Debian machines
> reconnected more quickly to the wifi.
> 
> I can live with this delay, especially when it's waking up in
> a different place than where it got suspended, but in the case where
> it's waking up at the same place where it got suspended, those extra 20s
> seem hard to justify.
> 
> Any idea what might be going on and how to make it quicker?

With no Network Manager and using wicd instead, my buster laptop
takes about 5 seconds from lid open to re-connect.

-dsr-