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Wifi error log for Bookworm?

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  Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-25 03:02 +0000
    Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-10-25 09:26 +0100
      Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-25 16:11 +0000
        Re: Wifi error log for Bookworm? Chris Townley <news@cct-net.co.uk> - 2024-10-25 19:38 +0100
          Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-25 23:43 +0000
        Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-26 05:44 +0000
          Re: Wifi error log for Bookworm? Chris Schram <chrispam1@me.com> - 2024-10-26 07:52 +0000
          Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-26 16:04 +0000
            Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-10-26 17:42 +0100
              Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-26 17:09 +0000
                Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-26 20:31 +0000
                Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-10-28 14:58 +0000
                  Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-28 16:28 +0000
                    Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-28 17:07 +0000
                      Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-10-28 22:28 +0000
                        Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-29 00:33 +0000
    Re: Wifi error log for Bookworm? Steven Hirsch <snhirsch@gmail.com> - 2024-10-26 18:38 -0400
      Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-10-27 11:13 +0000
      Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-27 16:27 +0000
        Re: Wifi error log for Bookworm? mm0fmf <none@invalid.com> - 2024-10-27 19:37 +0000
          Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-10-28 15:01 +0000
            Re: Wifi error log for Bookworm? mm0fmf <none@invalid.com> - 2024-10-28 17:32 +0000
              Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-28 18:54 +0000
                Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-28 21:03 +0000
                  Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-29 00:32 +0000
                    Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-29 01:42 +0000
                Re: Wifi error log for Bookworm? Chris Townley <news@cct-net.co.uk> - 2024-10-28 21:51 +0000
                  Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-28 23:01 +0000
                Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-10-28 22:29 +0000
                Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-10-29 20:28 +0000
                  Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-29 21:08 +0000
                    Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-10-30 21:24 +0000
                      Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-30 23:59 +0000
                        Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-10-31 21:37 +0000
                          Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-01 00:00 +0000
                      Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-10-31 09:46 +0000
                        Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-31 19:28 +0000
                        Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-10-31 21:54 +0000
                          Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-01 00:02 +0000
                          Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-11-01 10:24 +0000
                            Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-11-01 12:39 +0000
                            Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-11-01 12:50 +0000
                              Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-11-01 13:47 +0000
                                Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-11-01 14:15 +0000
                                  Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-11-01 15:16 +0000
                                    Re: Wifi error log for Bookworm? Chris Elvidge <chris@internal.net> - 2024-11-01 15:24 +0000
                                      Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-11-01 15:34 +0000
                                    Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-11-01 20:40 +0000
                                      Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-11-02 11:10 +0000
                                        Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-11-04 10:58 +0000
                                          Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-11-04 12:49 +0000
                  Re: Wifi error log for Bookworm? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2024-10-30 10:20 +0200
                    Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-10-30 21:26 +0000
                      Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-31 00:00 +0000
                        Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-11-01 12:58 +0000
                          Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-01 21:00 +0000
                            Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-11-04 10:57 +0000
                  Re: Wifi error log for Bookworm? <bp@www.zefox.net> - 2024-10-30 16:18 +0000
                    Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-10-30 18:27 +0000
                    Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-10-30 21:35 +0000
                      Re: Wifi error log for Bookworm? The Natural Philosopher <tnp@invalid.invalid> - 2024-10-31 09:55 +0000
    Re: Wifi error log for Bookworm? druck <news@druck.org.uk> - 2024-10-28 14:55 +0000
      Re: Wifi error log for Bookworm? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-10-29 00:28 +0000
    Re: Wifi error log for Bookworm? David Dos Santos <usenet@vk3heg.net> - 2026-09-07 07:30 -0700
      Re: Wifi error log for Bookworm? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-07 21:49 +0000

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#35994 — Wifi error log for Bookworm?

My Pi5 running bookworm has developed flaky WiFi behavior about
24 hours after the latest upgrade. 

Where should I look for error messages? Nothing shows up on the
screen during negotiation, it appears that the Pi negotiates
for a minute or two and then gives up. Two red X's appear in
the Wifi entry in the top-right menu bar and that's it.

The only visible hint is that even if the connection is specified
at 2.4 GHz a wavemon window is left showing what appears to be a
5 GHz attempt. My access point doesn't support 5 GHz, making the
attempt, if it is one, appear to be a mistake.


The access point works with other devices, so I don't think it's
the problem.

Thanks for reading and any suggestions!

bob prohaska
 

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#35995

On 25/10/2024 04:02, bp@www.zefox.net wrote:
> My Pi5 running bookworm has developed flaky WiFi behavior about
> 24 hours after the latest upgrade.
> 
> Where should I look for error messages? Nothing shows up on the
> screen during negotiation, it appears that the Pi negotiates
> for a minute or two and then gives up. Two red X's appear in
> the Wifi entry in the top-right menu bar and that's it.
> 
> The only visible hint is that even if the connection is specified
> at 2.4 GHz a wavemon window is left showing what appears to be a
> 5 GHz attempt. My access point doesn't support 5 GHz, making the
> attempt, if it is one, appear to be a mistake.
> 
> 
> The access point works with other devices, so I don't think it's
> the problem.
> 
> Thanks for reading and any suggestions!
> 
> bob prohaska
>   
All I can say is that my PiZero running bookworm became  stable with 
wifi after a more powerful PSU was fitted to it.



-- 
The higher up the mountainside
The greener grows the grass.
The higher up the monkey climbs
The more he shows his arse.

Traditional

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#35996

The Natural Philosopher <tnp@invalid.invalid> wrote:
> On 25/10/2024 04:02, bp@www.zefox.net wrote:
>> 
>> The access point works with other devices, so I don't think it's
>> the problem.
>> 
>> Thanks for reading and any suggestions!
>> 
>> bob prohaska
>>   
> All I can say is that my PiZero running bookworm became  stable with 
> wifi after a more powerful PSU was fitted to it.
> 

It turns out that moving the Pi5 within three feet the access point
restores normal WiFi operation. Signal quality reported by wavemon
went from 90% to 100% and the WiFi connected automatically in parallel
to a wired connection. However,  neighbor's APs using the 2.4GHz band 
appear with 67-76% signal quality. If I were to move the Pi5 back to
its original location, its signal strength at the AP would be much lower.
 
It's difficult to improve the Pi5's antenna, but my AP has an
SMA connector. Does anybody have experience with directional
antennas?
 
At the moment, the Pi5 is showing 5.05 volts at the GPIO header.
I think that's slightly lower than I saw previously when the Pi5
was in the troublesome location. The PSU doesn't seem the prime suspect. 

Thanks for reading, and any suggestions.

bob prohaska

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#35997

On 25/10/2024 17:11, bp@www.zefox.net wrote:
> The Natural Philosopher <tnp@invalid.invalid> wrote:
>> On 25/10/2024 04:02, bp@www.zefox.net wrote:
>>>
>>> The access point works with other devices, so I don't think it's
>>> the problem.
>>>
>>> Thanks for reading and any suggestions!
>>>
>>> bob prohaska
>>>    
>> All I can say is that my PiZero running bookworm became  stable with
>> wifi after a more powerful PSU was fitted to it.
>>
> 
> It turns out that moving the Pi5 within three feet the access point
> restores normal WiFi operation. Signal quality reported by wavemon
> went from 90% to 100% and the WiFi connected automatically in parallel
> to a wired connection. However,  neighbor's APs using the 2.4GHz band
> appear with 67-76% signal quality. If I were to move the Pi5 back to
> its original location, its signal strength at the AP would be much lower.
>   
> It's difficult to improve the Pi5's antenna, but my AP has an
> SMA connector. Does anybody have experience with directional
> antennas?
>   
> At the moment, the Pi5 is showing 5.05 volts at the GPIO header.
> I think that's slightly lower than I saw previously when the Pi5
> was in the troublesome location. The PSU doesn't seem the prime suspect.
> 
> Thanks for reading, and any suggestions.
> 
> bob prohaska
> 

Can you not use ethernet cable?

-- 
Chris

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#36002

Chris Townley <news@cct-net.co.uk> wrote:
> On 25/10/2024 17:11, bp@www.zefox.net wrote:
>> The Natural Philosopher <tnp@invalid.invalid> wrote:
>>> On 25/10/2024 04:02, bp@www.zefox.net wrote:
>>>>
>>>> The access point works with other devices, so I don't think it's
>>>> the problem.
>>>>
>>>> Thanks for reading and any suggestions!
>>>>
>>>> bob prohaska
>>>>    
>>> All I can say is that my PiZero running bookworm became  stable with
>>> wifi after a more powerful PSU was fitted to it.
>>>
>> 
>> It turns out that moving the Pi5 within three feet the access point
>> restores normal WiFi operation. Signal quality reported by wavemon
>> went from 90% to 100% and the WiFi connected automatically in parallel
>> to a wired connection. However,  neighbor's APs using the 2.4GHz band
>> appear with 67-76% signal quality. If I were to move the Pi5 back to
>> its original location, its signal strength at the AP would be much lower.
>>   
>> It's difficult to improve the Pi5's antenna, but my AP has an
>> SMA connector. Does anybody have experience with directional
>> antennas?
>>   
>> At the moment, the Pi5 is showing 5.05 volts at the GPIO header.
>> I think that's slightly lower than I saw previously when the Pi5
>> was in the troublesome location. The PSU doesn't seem the prime suspect.
>> 
>> Thanks for reading, and any suggestions.
>> 
>> bob prohaska
>> 
> 
> Can you not use ethernet cable?

Not conveniently. The AP is at the back of the house, the Pi5 is used
near the front. A neatly-routed cable will be close to 50 feet long, 
with lots of zigs and zags through three rooms. 
Physically, it's possible but not desirable.

If a directional antenna is practical that would be much better.

Thanks for writing,

bob prohaska


 

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#36003

On Fri, 25 Oct 2024 16:11:17 -0000 (UTC), bp wrote:

> Does anybody have experience with directional antennas?

Back in the early days when broadband Internet was still exotic and 
expensive and wi-fi was new, people experimented with using it for longer 
range point-to-point connections. I remember reports that empty Pringles 
potato-chip cans were a remarkably cost-effective way of achieving the 
necessary directionality.

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#36004

On Sat, 26 Oct 2024 05:44:52 -0000 (UTC), Lawrence D'Oliveiro wrote:

> On Fri, 25 Oct 2024 16:11:17 -0000 (UTC), bp wrote:
> 
>> Does anybody have experience with directional antennas?
> 
> Back in the early days when broadband Internet was still exotic and
> expensive and wi-fi was new, people experimented with using it for
> longer range point-to-point connections. I remember reports that empty
> Pringles potato-chip cans were a remarkably cost-effective way of
> achieving the necessary directionality.

Memories, memories. Back in the day all I could get was dialup Internet 
service. My neighbor however had one of them new-fangled satellite 
connections (quite shitty by today's standards). He rigged up a cantenna 
so that I could "borrow" his WiFi. I was allowed to use it in the middle 
of the night. Otherwise I'd override his allocated bandwidth.

I do now wish to relive that time in Internet history.

-- 
chrispam1@me.com is an infrequently monitored address. Email may get lost.
Networking: What happens when, for as long as a moment, billions of
things simultaneously fail to go wrong. -- Dan Farkas, 3/3/2007

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#36006

Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
> On Fri, 25 Oct 2024 16:11:17 -0000 (UTC), bp wrote:
> 
>> Does anybody have experience with directional antennas?
> 
> Back in the early days when broadband Internet was still exotic and 
> expensive and wi-fi was new, people experimented with using it for longer 
> range point-to-point connections. I remember reports that empty Pringles 
> potato-chip cans were a remarkably cost-effective way of achieving the 
> necessary directionality.

As I understand it, the Pringles "cantenna" was intended to be maximally
directional. If I understand my problem correctly the need is to "shadow"
my access point from the neighbors more than to direct transmit power
to my clients (signal level at the client location is ~90% per wavemon,
80% gave good connectivity until recently).

There seem to be a few complaints about wifi behavior on the Forums,
since my problems appeared out of the blue after an upgrade it's possible
that software is involved also. 

Something very similar happened after a bookworm upgrade a few months ago.
After some hair-pulling and a few more upgrades it simply went away.

As an aside, now wavemon seems to crash on its own, reporting:

│Waiting for scan data ...free(): double free detected in tcache 2                                                              │
│                                                                 Aborted 

That seems clearly to be a software issue, though whether in wavemon or
somewhere else isn't clear to me.

Thanks for writing,

bob prohaska

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#36007

On 26/10/2024 17:04, bp@www.zefox.net wrote:
> f I understand my problem correctly the need is to "shadow"
> my access point from the neighbors more than to direct transmit power
> to my clients (signal level at the client location is ~90% per wavemon,
> 80% gave good connectivity until recently).

Moving transmitted frequency can help a lot

-- 
"I guess a rattlesnake ain't risponsible fer bein' a rattlesnake, but ah 
puts mah heel on um jess the same if'n I catches him around mah chillun".

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#36008

The Natural Philosopher <tnp@invalid.invalid> wrote:
> On 26/10/2024 17:04, bp@www.zefox.net wrote:
>> f I understand my problem correctly the need is to "shadow"
>> my access point from the neighbors more than to direct transmit power
>> to my clients (signal level at the client location is ~90% per wavemon,
>> 80% gave good connectivity until recently).
> 
> Moving transmitted frequency can help a lot
> 


My AP is using 2417 MHz ch 2, none of the nearby Aps are using it. The
second strongest is using 2437 MHz ch 6. That's with the Pi5 within
three feet of my AP. At the moment Wifi won't connect at all, though
both my cellphone and a second computer farther away connect successfully.

Another puzzle is that wavemon reports 5825 MHz ch 165 after the connect
process fails. The targeted access point uses only 2417, so it's as if 
an unprompted search has started. Meanwhile my cellphone has no trouble
connecting to the AP, near or far. 

There are 15 APs within range, most reporting ESS including mine. Anybody
know what ESS signifies?

Thanks for writing,

bob prohaska

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#36010

bp@www.zefox.net wrote:
[snipped]
Just to add to the confusion, a few minutes ago the wifi started to work.
The client is still about three feet from the access point.

The signal level is -33 dBm, the strongest interferer is at -60 dBm,
roughly the same situation as earlier when the wifi wouldn't connect.

A quick test of the voltage at the GPIO pins reads 5.05 volts, a few
millivolts lower than seen when wifi didn't work. No software updates
have become available. Basically no controllable changes between not
working and working. 

Thanks for reading!

bob prohaska
 

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#36020

On 26/10/2024 18:09, bp@www.zefox.net wrote:
> My AP is using 2417 MHz ch 2, none of the nearby Aps are using it. 

On 2.4 GHz only use channels 1, 6 and 11, as the others overlap those 
and cause worse interference than sharing with a stronger signal on 1,6 
or 11.

---druck

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#36023

druck <news@druck.org.uk> wrote:
> On 26/10/2024 18:09, bp@www.zefox.net wrote:
>> My AP is using 2417 MHz ch 2, none of the nearby Aps are using it. 
> 
> On 2.4 GHz only use channels 1, 6 and 11, as the others overlap those 
> and cause worse interference than sharing with a stronger signal on 1,6 
> or 11.

Perhps you've hit the nail on the thumb 8-)

Channel 1 is used at 2412 MHz, channel 2 is used by me, channel 6 is
used at 2437 MHz (5 signals) and channel 11 is used at 2462 (3 signals).

The channel 11 signal appears to be about 10 dBm down and the weakest
of all the interferers at my AP. The situation will deteriorate
if I move the client back to its working location but still might be an
improvement over the status quo.

I'll try channel 11 and see what happens.

Thank you very much!

bob prohaska

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#36024

bp@www.zefox.net wrote:
> 
> I'll try channel 11 and see what happens.

Attempting to set channel 11 b/g appeared to work but resulted 
in password rejection, repeatedly asking for the password which
is known to work on other hosts and on this host previously.

For some reason it's difficult to get rid of old connection presets,
making it a little unclear if changes I'm trying to save actually
work as intended.

In the meantime a large batch of updates became available. I'll
install those and reboot.

Thanks for reading!

bob prohaska

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#36029

On 28/10/2024 17:07, bp@www.zefox.net wrote:
> For some reason it's difficult to get rid of old connection presets,
> making it a little unclear if changes I'm trying to save actually
> work as intended.
try looking in :

/etc/NetworkManager/system-connections

You should be able to delete the appropriate unwanted wifi connection

-- 
Labour - a bunch of rich people convincing poor people to vote for rich 
people by telling poor people that "other" rich people are the reason 
they are poor.

Peter Thompson

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#36034

On Mon, 28 Oct 2024 22:28:22 +0000, The Natural Philosopher wrote:

> try looking in :
> 
> /etc/NetworkManager/system-connections
> 
> You should be able to delete the appropriate unwanted wifi connection

They are all text files. You can even edit them, if you want.

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#36011

On 10/24/24 23:02, bp@www.zefox.net wrote:
> My Pi5 running bookworm has developed flaky WiFi behavior about
> 24 hours after the latest upgrade.
> 
> Where should I look for error messages? Nothing shows up on the
> screen during negotiation, it appears that the Pi negotiates
> for a minute or two and then gives up. Two red X's appear in
> the Wifi entry in the top-right menu bar and that's it.
> 
> The only visible hint is that even if the connection is specified
> at 2.4 GHz a wavemon window is left showing what appears to be a
> 5 GHz attempt. My access point doesn't support 5 GHz, making the
> attempt, if it is one, appear to be a mistake.
> 
> 
> The access point works with other devices, so I don't think it's
> the problem.
> 
> Thanks for reading and any suggestions!

This sounds very familiar.  I fought the same pitched battle here with Wifi 
and Pi5 under Bookworm.  Finally discovered that HDMI output interferes with 
the 2.4 GHz band.  Try running headless over ssh and see if that's any better? 
  Made an improvement here for 2.4 GHz, but did not help 5 GHz connectivity.

I finally ended up replacing an 8 year old Wifi router and that fixed the 5 
GHz band.  Something about the Pi5 Wifi implementation really does not like 
older routers.

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#36012

On 26/10/2024 23:38, Steven Hirsch wrote:
> On 10/24/24 23:02, bp@www.zefox.net wrote:
>> My Pi5 running bookworm has developed flaky WiFi behavior about
>> 24 hours after the latest upgrade.
>>
>> Where should I look for error messages? Nothing shows up on the
>> screen during negotiation, it appears that the Pi negotiates
>> for a minute or two and then gives up. Two red X's appear in
>> the Wifi entry in the top-right menu bar and that's it.
>>
>> The only visible hint is that even if the connection is specified
>> at 2.4 GHz a wavemon window is left showing what appears to be a
>> 5 GHz attempt. My access point doesn't support 5 GHz, making the
>> attempt, if it is one, appear to be a mistake.
>>
>>
>> The access point works with other devices, so I don't think it's
>> the problem.
>>
>> Thanks for reading and any suggestions!
> 
> This sounds very familiar.  I fought the same pitched battle here with 
> Wifi and Pi5 under Bookworm.  Finally discovered that HDMI output 
> interferes with the 2.4 GHz band.  Try running headless over ssh and see 
> if that's any better?  Made an improvement here for 2.4 GHz, but did not 
> help 5 GHz connectivity.
> 

I have read this elsewhere. All my Pis run headless

> I finally ended up replacing an 8 year old Wifi router and that fixed 
> the 5 GHz band.  Something about the Pi5 Wifi implementation really does 
> not like older routers.
> 
> 
One other oddity that probably isn't germane is that my pi PICOS would 
not connect to an extreme 'edge of band' frequency  which is UK legal 
until I removed the code that said 'use only UK legal frequencies'

> 

-- 
Labour - a bunch of rich people convincing poor people to vote for rich 
people by telling poor people that "other" rich people are the reason 
they are poor.

Peter Thompson

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#36014

Steven Hirsch <snhirsch@gmail.com> wrote:
> On 10/24/24 23:02, bp@www.zefox.net wrote:
>> My Pi5 running bookworm has developed flaky WiFi behavior about
>> 24 hours after the latest upgrade.
>> 
>> Where should I look for error messages? Nothing shows up on the
>> screen during negotiation, it appears that the Pi negotiates
>> for a minute or two and then gives up. Two red X's appear in
>> the Wifi entry in the top-right menu bar and that's it.
>> 
>> The only visible hint is that even if the connection is specified
>> at 2.4 GHz a wavemon window is left showing what appears to be a
>> 5 GHz attempt. My access point doesn't support 5 GHz, making the
>> attempt, if it is one, appear to be a mistake.
>> 
>> 
>> The access point works with other devices, so I don't think it's
>> the problem.
>> 
>> Thanks for reading and any suggestions!
> 
> This sounds very familiar.  I fought the same pitched battle here with Wifi 
> and Pi5 under Bookworm.  Finally discovered that HDMI output interferes with 
> the 2.4 GHz band.  Try running headless over ssh and see if that's any better? 
>  Made an improvement here for 2.4 GHz, but did not help 5 GHz connectivity.
> 
> I finally ended up replacing an 8 year old Wifi router and that fixed the 5 
> GHz band.  Something about the Pi5 Wifi implementation really does not like 
> older routers.
 

What router are you using? Mine is indiputably old, D-Link DI-524, but it
works with everything else now and worked with the Pi5 except for two major
episodes, a couple months ago and again now. In the meantime it was fine.. 

The idea that hdmi is the culprit can't be ruled out, but I'm skeptical it's
the source of the trouble. This particular Pi5 has _always_ been used with
hdmi operating. Wifi has been a problem only intermittently, usuall a day
after an OS update. In the first instance, the problem simply went away
after a subsequent update. In the present instance, the problem appeared
a day after an update and persisted through yesterday, when I moved the
Pi5 next to the router to check signal strength. Initially wifi worked,
then it stopped working, failing silently and not able to re-connect.

Last night wifi connected and remains up as I write this. After turning
wifi off, it turned back on without trouble while hdmi was active, something
that didn't happen yesterday. Wavemon presently reports -31dBm on the active
connection and -58dBm for the strongest interferer. I'm using 2417MHz ch 2,
the strongest interferer is 2437MHz ch 6, which has been consistent over time.

Thanks for writing!

bob prohaska

 
 

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#36017

On 27/10/2024 16:27, bp@www.zefox.net wrote:
> old, D-Link DI-524,

You really need to get a router that was already considered obsolete by 
people like Marconi and move into the modern era.

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