Originally Posted by Fellfrosch

I'm a complete idiot. My Pro1 is in a bootloop after I updated. I should have switched to testing. Especially, because I sacrificed my backup on my SD card for more Space for photos, while I was on holiday.

So I decided to reflash.
Unfortunately It seems like I totally killed my device.
When I try

Code:

fastboot set_active a

I get

Code:

error: Device does not support slots.

(fastboot devices lists my device)

Any suggestions???