Re: bookworm wifi (was spontaneous locale change on bookworm)

On 22/09/2024 00:53, bp@www.zefox.net wrote:

[subject updated to reflect recent observations]
 The Natural Philosopher <tnp@invalid.invalid> wrote:

>
Well it may be completely irrelevant Bob, but my Pi Zero 2 W issues seem
to have been solved by use of a bigger power supply.
It may be that the wifi chip is the most sensitive to inadequate voltages.

 The wifi dropout has repeated three or four times since the initial case.
Usually it dropped after an hour or so of uptime and couldn't reconnect
on its own, the Pi had to be rebooted. Haven't seen anything more about
rfkill after the first incident.
  I put a voltmeter on the GPIO power pins, it looks steady at 5.09-5.10 volts.
The meter isn't what I'd call a precision unit, but it's likely within 50 mV,
so the voltage isn't obviously wrong.
 

Mmm. if you have a scope, also check for noise.

Just a few minutes ago the WiFi dropped, then came back up on its own a
couple or three minutes later. Wasn't watching the voltmeter, unfortunately.
I'll keep an eye peeled more carefully, perhaps it can be caught in the act.
 

That is the sort of behaviour an 'on the edge' wifi subsystem displays.
My router has 'connection time' and 'reconnection time' set to 1 hour and 1 day.
I think that after the reconnection time is up, it wants a re-send of the secret keys.
That is, you will, by design, get disconnected every so often,. The issue is whether the reconnect succeeds.
Low voltage and/or local noise seem to be issues for the wifi chips in use.

Thanks for writing,
 bob prohaska
 

--
Any fool can believe in principles -  and most of them do!