From off state, press power button, LED and haptic feedback activate [EDIT: momentarily], but screen stays black, no login screen displays. [EDIT: And the LED turns off, as it should, because the phone is “on,” although the screen doesn’t come on.]
It’s possible to ssh into the phone (a device only needs to be on, not necessarily logged in for this), so I know that the power is on (and draining), but screen is still blank/black.
Workaround: shut down by holding the power button, and try again. Sometimes it takes the 18-second press to enable power-on with an activated screen.
Is it possible that the phone is just running some periodic test in the background before powering up the display?
I’ll file a bug, unless someone can identify an issue in the “user headspace” area that’s easy to correct.
With Screen you talk about your Display and not the Linux screen bash Script or Program? I think it might be a Hardware Bug or broken Display? I did not have this issue. Can you add USB-C Adapter, Keyboard and open with ctrl + alt + 1 (or some other Number) a Tty-Console? During boot of the Librem 5 it is push the Volume down Button, to see the Messages of Booting or Updates.
If not i might think that your Display or Driver for Visualization is broken…