It’s been a while, but I did just now try to update my Pinephone Pro. The update seemed to go well, but after the update, the time was wrong, and the phone was unresponsive. So, I rebooted it with the power button. It’s still trying to boot up. It reads,
Failed to start Simple Desktop Display Manager
Then, the following line is repeated endlessly:
brcmfmac: brcmf_set_channel: set chamspec 0x100c fail, reason -52
Note, the print is small (so I may have made an error in transcribing this here), and these lines keep repeating, saying the same thing except the numbers/letters after “0x” are different (IE, it may say, “0xd02a”, otherwise the line is identically repeated.)