Okay, I've got it. It only appears when I attach / detach the micro usb cable for loading the battery. When I remove the cable, the phone won't wake up again or (if the display was on) after the next sleep. Same thing happens when I attach the power cable.

I logged in via ssh and got this from syslog: https://paste.ubuntu.com/25171358/
After the last "handle_power_button_press" nothing happens - even when I press the button again (or press other buttons). SSH-connection is alive and the phone command line is usable.

@wgarcia yes, that was one of my first thoughts as well. But it still happens

Thanks for all the other answers @hans1977se and @Bastos - I'll try it if it happens again. This morning it happened after each sleep but now it runs without any problems. I'll send you some feedback

Hi everybody,

I'm new to UBports and installed the latest version on my Fairphone 2 yesterday. It works nice but sometimes the phone doesn't wake up after sleep. The screen stays black and nothing happens.

Is there a way to debug this?