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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: The Natural Philosopher <tnp@invalid.invalid> Newsgroups: comp.sys.raspberry-pi Subject: Re: bookworm wifi (was spontaneous locale change on bookworm) Date: Sun, 22 Sep 2024 09:48:15 +0100 Organization: A little, after lunch Lines: 51 Message-ID: <vcolkf$24ol2$8@dont-email.me> References: <vcmq6m$1l88o$1@dont-email.me> <vcmua5$1luqv$1@dont-email.me> <vcn3ep$1mla1$4@dont-email.me> <vcnm9h$1plc3$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Sun, 22 Sep 2024 10:48:16 +0200 (CEST) Injection-Info: dont-email.me; posting-host="b83977870f773d29c3595abc7b614c8d"; logging-data="2253474"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18jNr7YJPSj+pI10EaoHzCFDp2/WMY2Mdc=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:2E9mv+DgNnlcI8L/YH1PFEd5+R0= In-Reply-To: <vcnm9h$1plc3$1@dont-email.me> Content-Language: en-GB Bytes: 2842 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!