Rooting unlocked FP6 not possible [fastboot boot]

Hi,

I unlocked my bootloader as described for FP5 successfully. The bootloader says unocked.

While trying to boot from a connected PC via

adb reboot bootloader
fastboot boot magisk_patched_boot.img

I get the message, that the boot failed because the device says
“unknown comand”

There was an equal problem with Fairphone 4 devices some years ago but the problem came up with /e/ and not with FairphoneOS.

Has anyone this Problem, too or an easy work-around?

Thanks in advance

Julric

It may be, that the command fastboot boot is not supported on FP5. In this case it can be possible to use fastboot flash instead. But i can not guarantee that it will work. Be ready to reflash if things goes wrong.

Normally a rather bad idea when rooting

I used apatch and fastboot boot also didn’t work for the same reason
but fastboot flash boot worked like it should

Thanks for the answers!

I want to provide You with some more information:

I downloaded the package from Fairphone (FP6.QREL.15.91.0), extracted the boot,img, copied it to the FP6, patched the file with magisk and copied it back to my computer. (developer options activated, device unlocked(_critical), adb active:

adb reboot bootloader
fastboot boot magisk_patched_boot.img

downloading 'boot.img'...
OKAY [  2.571s]
booting...
FAILED (remote: unknown command)
finished. total time: 2.571s

doing it by fastboot flash boot (or boot_a or boot_b) magisk_patched_boot.img
and fastboot reboot afterwards gives no success: device boots, but in magisk app ist just says

installed: not available
zygisk: no
ramdisk: yes

so I am not able to patch the device (which shouldn’t be necessary when flashing a patched boot.img) - there is still no root.

Today I tried something new:
I took the complete installation-package, extracted it, replaced the original boot.img with my magisk_patched_boot.img, corrected the sha256sum for the boot.img and made a complete factory reset as fairphone describes. Everything successful, but still no root-access.

Has anyone an idea, what goes wrong?
Is there a problem with magisk as root-tool?
Do I forget something else to do?

Thanks in advance
Julric

Just linking the instructions working since the FP4 for reference

Hi Yvonne,

that is exact, what I did and what I described!

  • fastboot boot … ← not working
    (see output of fastboot above)

So my question: what changed at FP6, that there is no rooting along the known way possible?
Android 15?

~Julric

1 Like

@lucaweiss could you probably shed some light on this topic? Does fastboot boot really not work/exist?

Right now it’s not available, it was missed to be enabled in the bootloader. Hopefully a future update soon will enable “fastboot boot”!

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Maybe @Kalibri could provide their patched boot.img?

I mean I did the exact same thing, just with apatch instead of magisk. If I patch it with apatch and flash it, root works for me. Should be the same for everyone.
But I haven’t tried magisk