Re: Wifi error log for Bookworm?

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.