Booting Issues

[molino]

I had also exactly these problems. update, then bootloop and no files to downgrade under /var/cache/apt/archives/.
Even if the PineNote hangs in  bootloop, it is possible, at least for me, to log in via ssh!
It was not necessary to use the UART dongle.
I downloaded the file mutter-common_47.4-1_all.deb here

Code:

wget https://ftp.rz.uni-wuerzburg.de/debian/pool/main/m/mutter/mutter-common_47.1-4_all.deb

and pasted it into

Code:

sudo mv mutter-common_47.1-4_all.de /var/cache/apt/archives/

.
Then

Code:

sudo dpkg -i /var/cache/apt/archives/mutter-common_47.4-1_all.deb

and the PineNote immediately switched to desktop mode.
It worked for me. Hope for others too.