Kali Linux for Pinebook Pro

[chaoskampf]

I did a test of Kali from an SD and it worked great. So I flashed it to the  eMMC, rebooted and worked well.

But then I ran sudo apt upgrade and now it doesn't move past a black screen after reboot. Both when booting from the eMMC and now I can't even install Kali from the sd card. The red power light comes on but it doesn't turn green and just hangs there.

Is there something from the upgrade process that may be preventing my PBP from booting to the SD?

I had that same issue before. This is a known issue. I flashed manjaro to emmc with adapter. It is probably possible to flash without adapter using emmc switch (pbp wiki or search forum).