Samsung Galaxy S4 stuck at loading screen

@calasso wrote in https://gitlab.com/postmarketOS/pmbootstrap/merge_requests/1668#note_94170252:

I am having problems with my device, after flashing postmarketOS, I can only access the ssh through the data cable, and when I connect the device quickly appears the boot screen and then turns black. Does this occur because of having multiple variants for [Samsung Galaxy S4]?

Thank you for reporting this issue. Some follow up questions:

Which model of the S4 do you have?
Did you flash the kernel and rootfs?
How did you flash the rootfs (with pmbootstrap flasher flash_rootfs, recovery zip, ...?)
Which UI have you selected?
What's the output of logread after logging in with SSH?

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