@Luksus You were right. I had to use the kernel I built and increase the system partition. I took 1.5 gb from system_b and added to system_a and now it works. Thanks for the hint.

@Luksus Ok. Sounds like that could be it. I will try to resize later today and see if that resolves it.

@ancientsounds It was merged, I cloned the repo and built it. I also added for fun binfmt and tried Winebox and that worked. I think Snapz0r crashes during setup. I realized that when you hit enable snaps after some time the phone actually reboots and nothing can make the oneplus 6 reboot you usally only get a black screen and have to hold the power button you're self to make it reboot. That makes me think it crashes. Can't find any logs though.

@christianBorg I ment "enable snaps" above

Did any of you got it working? I tried install dev form ubports-installer didn't work, I also build the kernel my self and same thing the app tells me that the kernel have support and after I hit "enable support" and reboot same thing a X and kernel has support "enable support".