Bullseye dist-upgrade?

Stuffu

Hi

Is there anything to consider about Bullseye and apt-get dist-upgrade from Buster?

Thanks in advance

busywait

1/ If you have a backup and you know how to restore it you have only your time to loose :)

2/ I've done the upgrade on a 64-bit (install from source) install of retro pie and I was able to coax the process through. You get a package conflict over the installed libsdl2 and libsdl2-dev packages that you have to constantly resolve with "sudo apt --fix-broken install libsdl2-2.0-0 libsdl2-dev" if you want to install anything using apt. (The retropie installer builds it's own libsdl2, v2.0.10, and marks it as held; the bullseye distribution wants it's own more recent 2.0.14 version. [Edit: both libsdl2 versions work for the RetroPie emulators in a quick check of lr-duckstation, mupen64plus, lr-mupen64plus-next, lr-genesisplus-gx])

This is all obviously also a problem if you install RetroPie on to a clean image.

3/ Have you seen this: raspberrypi.org/forums/viewtopic.php?t=323279?

My summary: as a minimum wait until the libsdl2 dependencies are fixed before exploring, unless you love learning apt repair options :D

Stuffu

@busywait Thanks for the reply. I didn't read the upgrade from Buster post, but reconsidering since it's quite clear that it's not recommended to do an upgrade :). Might do a clean install in the future instead.

Not sure if it will show in retropie, but read that there should be a performance increase with Bullseye. That was why I was considering it.

mitu

Not supported at this time by Raspberry Pi OS, nor RetroPie. Better install from scratch, when RetroPie will support it.

UDb23

@mitu
According to some comments (https://www.raspberrypi.com/news/bullseye-bonus-1-8ghz-raspberry-pi-4/) it seems you can fully upgrade Buster to kernel 5.10.63
and then you should be able to "boost" the clock to 1.8 ghz with arm_freq=1800
Anyone tried already ? Any notable performance increase?
Thanks

busywait

@udb23
Yes, that's been possible even before new kernel versions, and some people with very good cooling for their CPU (heatsink + fan) can take that number up even higher.

What has changed in current kernels is that you don't need to specify any increased voltage. The voltage will be increased automatically, appropriately for the frequency that you select.

Here are the overclock options that I use for my passively cooled Pi 4B 2G v1.1, which is in a heatsink case:

# %%% speed up
arm_freq=1700
v3d_freq=650
core_freq=650
hdmi_enable_4kp60=1

There is more to read about the different options here: www.raspberrypi.com/documentation/computers/config_txt.html#overclocking

You can see what the current clock speeds are from a command line using this command:

watch -n 1 vcgencmd measure_clock arm core v3d

UDb23

@busywait Thanks a lot for the info. Will give it a try; currently running at stock freq
in a Flirc case. Hope it can work at 1800; I appreciate so much that the Pi is silent so I'm not gonna add a fan!

eusi

@mitu said in Bullseye dist-upgrade?:

Not supported at this time by Raspberry Pi OS, nor RetroPie. Better install from scratch, when RetroPie will support it.

Any idea when retropie will release its new version that is based on Bullseye? Just roughly (within next some weeks?)...
Thanks!

mitu

@eusi said in Bullseye dist-upgrade?:

Any idea when retropie will release its new version that is based on Bullseye? Just roughly (within next some weeks?)...

No idea.