Finally after resintalling android, I erased cache, data and system paritions and then use "Wipe data" using TWRP and I succcesfully installed ubuntu.

Finally after resintalling android, I erased cache, data and system paritions and then use "Wipe data" using TWRP and I succcesfully installed ubuntu.

@poVoq Thanks. I've done all that but no luck.

Re : Sony Xperia X (suzu/F5121 & F5122)
Hello,
I have followed exactly all the steps mentioned at the beginning of this topic, I have reflashed at least 10 times my F5121 to stock ROM android 8 and each time ubports-installer announces the installation was successful and however my F5121 only reboot to ut recovery.
In recovery mode I can access my phone with adb shell.
What can I do now ?
My F5121 was running SailfishOS before reflashing to android (and I succeeded reflashing SailfishOS on it).