Stuck in Loop White Screen with 'SONY'-Logo , warning screen 'Your device was unlocked and cant betrusted'
I tried to install Ubuntu Touch on my Sony Xperia x Performance dora_dsds. It hab stock android 8.
I activated developer options and usb debugging, unlocked the oem bootloader.
UBports Installer started but stalled with preparing image.
The device entered a loop with White Screen with 'SONY'-Logo and warning screen 'Your device was unlocked and cant betrusted' and the UBports installer lost the connection to the device.
I tried multiple times in fastboot mode to install (with the installer), but h the behavior was always as above.
What am I doing wrong ?
Is there an alternative way to flash? I found:
but I really didnt find where to get rootfs.img and so on ....
I would really apriciate any help !