I try to flash the original android image by doing adb sideload /home/hetzer/Desktop/hammerhead-m4b30z-factory-625c027b.zip Total xfer: 0.00x [image: jkN9ISx] Then I tried fastboot erase boot fastboot erase cache fastboot erase recovery fastboot erase system fastboot flash bootloader bootloader-hammerhead-hhz20h.img fastboot reboot-bootloader fastboot flash radio radio-hammerhead-m8974a-2.0.50.2.30.img fastboot flash radio radio-hammerhead-m8974a-2.0.50.2.30.img fastboot -w update image-hammerhead-m4b30z.zip extracting android-info.txt (0 MB)... extracting boot.img (8 MB)... target reported max download size of 1073741824 bytes archive does not contain 'boot.sig' archive does not contain 'dtbo.img' archive does not contain 'dt.img' extracting recovery.img (9 MB)... archive does not contain 'recovery.sig' extracting system.img (996 MB)... archive does not contain 'system.sig' archive does not contain 'vbmeta.img' archive does not contain 'vendor.img' wiping userdata... Couldn't parse erase-block-size '0x'. Couldn't parse logical-block-size '0x'. mke2fs 1.45.5 (07-Jan-2020) /tmp/TemporaryFile-wRGgYM: Unimplemented ext2 library function while setting up superblock /usr/lib/android-sdk/platform-tools/mke2fs failed with status 1 mke2fs failed: 1 error: Cannot generate image for userdata Then, it is just stuck at bootloader. Then I reinstall ubuntu touch and it seems to work