Since a couple of days, when I plug my Vivlio Touch HD Pro to my desktop computer or my laptop (both running Debian 12, aka Bookworm), or my job laptop (running Bookworm or Windows 11), I can see the battery is charging but synchronization mode doesn't start anymore.
I've played with the "Advanced / USB mode" parameter. Same observation. With different USB cables. Same observation.
Impossible to synchronize files anymore!
Any recommendation? Should I restore factory settings (at what cost?)? How could I debug this?
The reader is running with the official OS; Simply installed tetris, taranis, pbterm and SGT puzzles. Note that I've not installed any new program recently.