Hello Ray,

> Some of you may have noticed a 'bullseye' repository in raspberrypi.org
> site. Bullseye is the code name for the next 'stable' Debian release.
> This got me to wondering if I could do an in place upgrade to
> 'bullseye'.
> So, yesterday I started with a virgin microSD card, copied the 'lite'
> version of raspberry pi os to it; did update/upgrade; and then changed
> the sources.list file to point at 'bullseye' instead of 'buster'. I then
> did the update/upgrade and found that it worked quite well. I did have
> to
> download two .deb files from the Debian armhf repos to solve a
> dependency
> issue and then finished. It seems to have worked fine.

Interesting.
What Pi model did you use that on?
Does that OS also work on a Raspberry Pi 4B 8GB?

Henri.

---