обновление debian 10->11 - ошибка

 заменяем sources.list 

The following packages have unmet dependencies:

 libc6-dev : Breaks: libgcc-8-dev (< 8.4.0-2~) 

but 8.3.0-6+rpi1 is to be installed

Нужно:

sudo apt update

sudo apt install libgcc-8-dev gcc-8-base

sudo apt full-upgrade

https://forums.raspberrypi.com/viewtopic.php?t=323279

И возможно - надо не пропустить ещё блок

When it completes, edit /boot/config.txt.
Comment out any lines which contain "dtoverlay=vc4-fkms-v3d" by putting a # sign at the start of the line.
At the bottom of the file, in the [all] section, add the line "dtoverlay=vc4-kms-v3d" - note that is "kms", not "fkms".