Screen does not work up with 5.7.0+pinephone9

Since updating to linux-image-5.7-pinephone_5.7.0+pinephone9 my screen is always off. I asked around on the forums, but nobody else seems to have the problem. https://forum.pine64.org/showthread.php?tid=10791

The screen works with mobian-pinephone-20200716.img.gz but as soon as I update the package linux-image-5.7-pinephone the screen won't turn on at the next boot. I also have the problem when flashing mobian-pinephone-20200726.img.gz.

I can still ssh into the phone. It seems to be really just the screen that is not working on the newest kernel.

Does anyone have the deb for linux-image-5.7-pinephone_5.7.0+pinephone8? Then I could at least use my usual installation again.