Re: More WiFi mischief in Bookworm

On 16/06/2025 23:26, bp@www.zefox.net wrote:

After a month or so of working well, the wifi has again started acting
strange after a series of software updates on a Pi5 running Bookworm.

I've had far more problems with Bookworm since it moved to Network Manager than with Bullseye and dhcpcd. I had to wind back a unpdate to one and only one of my Pi 5s at the beginning of the year, due to unreliability, but whatever it was went away at the next update. Luckily I have two root partitions on the nvme, so I can upgrade and keep the previous available with a simple edit of cmdline.txt
Although it's not the problem you are seeing on the Pi 5, after the update I did at the beginning of May two of my Pi's overnight rsync backups went from taking a few tens of seconds, to anything from minutes to 5 hours.
I suspected the WiFi, SD cards, power supplies or even the machines themselves. After trying many combinations of those things, the common factor was they were the only two ones on Bookworm with 512MB of RAM, everything else having 1GB or more. One was a Pi Zero 2W which started taking minutes to backup, and the Pi 3A+ would hang for hours. I have lot's of 512MB Pi Zero Ws but they have cameras so are still on Bullseye so they can use RaspImjpeg with the legacy camera sack, and don't have any problems.
The only way around it was to go back to using the old Bullseye image on the 3A+, and dig out one of the old 1MBs Pi 2B to replace the Zero 2W. The backups went back to taking 20 to 30 seconds. At the next round of upgrades (I only tend to do it a couple of times a year), I'll try the original configurations with Bullseye again.
---druck