James Hughes

@sub0ne Any answers to the remaining questions? Or has the problem fixed itself?

> I now did an apt-get update/full-upgrade and some brcmf files were updated. Hoping the problem would be fixed but it is not. After 2 weeks of flawless connection wifi...

Not good overall, just in my experience with wireless adapters etc. It is a problem with the wireless firmware. Which we don't have access to so will need to be...

This would appear to need technical support, rather than be reporting a bug. For technical support queries please use the Raspberry pi forums. www.raspberrypi.org/forums

I doubt this has anything to do with any overvoltage. If you measure the 5v on the board itself, it will read about 5v. The PS is 5.1v to compensate...

I did a little more digging into the second point you made, and have this response from a power supply expert. "The output of the PSU does float with reference...

Our current release is Bookworm, the previous version, Bullseye (our legacy release) usually gets security updates only. Does the problem exhibit on Bookworm?

Have you got the latest bootloader on the Pi5? There has been a fix for boot timing in that.

So, do you have two display devices attached? What does 'tvservice -l' report?

Why have you set -t to -1? What are you trying to achieve with that?