MuOS won’t boot after root partition mounted on PC

[arkun]

It’s likely the same reason we don’t recommend using a Steam Deck to upload files:

Using a Steam Deck to Transfer Files

My Device is Stuck on the Boot Logo Have you inserted your SD1 card into a Steam Deck and when putting it back into your device, it is unable to boot properly? This is a known issue - the Steam Deck is auto mounting your mSD card. This is not something that is caused by muOS, and it isn’t something that a future muOS update could resolve unfortunately. There are multiple partitions on the mSD card and the first one is very important for booting, the Steam Deck attempts to ‘repair’ this by defa…