Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: bp@www.zefox.net
Newsgroups: comp.sys.raspberry-pi
Subject: Re: More WiFi mischief in Bookworm
Date: Tue, 17 Jun 2025 15:08:42 -0000 (UTC)
Organization: A noiseless patient Spider
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The Natural Philosopher <tnp@invalid.invalid> wrote:
> On 16/06/2025 23:26, bp@www.zefox.net wrote:
>> 
>> One report on the web suggested that certain characters in passwords
>> were not handled correctly in bookworm. The only "special" character
>> I use is a period (.), which according to all reports I can find is
>> legal for ssid passwords.
>> 
> I have a period in my SSID pasword and all my Pis work fine
> 
>> 
> I had a Pi zero problem that sounds suspiciously like this. A better PSU 
> made it disappear.
> 
> I have a sneaking suspicion that a lot of Pis loaded up with whatever 
> are now actually on the limit with respect to PSU current. Wifi takes a 
> lot of power when actually transmitting data.
> 
> Friend had a Pi5 that wouldn't connect to his disk, via USB but would 
> connect to mine.
> 
> Powered hub sorted it...

In the course of exploring the wifi problems I moved the Pi5 to a new
location where it could use a wired ethernet connection. On reboot I
saw a message saying that "USB booting requires a 5V 5A power supply"
or words to that effect. I think the message is new, it's unclear if
it's a warning or merely informational. At the same time I added a
2nd monitor, which led to some confusion (mine) during startup so it
took a couple of tries, ending with both monitors working correctly.
Whether the failures were boot problems or just me looking at the wrong
screen is not apparent. 

Right now there's a voltmeter connected to the ground and +5V pins on
the GPIO header, Wifi is on, the meter reads 5.08V. Turning wifi off
seems to make no difference. Turning wifi back on caused a momentary
dip to 5.06V which recovered within one second. 

If that's a PSU problem it's mighty subtle.

Thanks for writing!

bob prohaska