On old Android 4.4.2 phone I could easily root with Kingoroot thereafter I could easily install Magisk 22.1 on it. After rebooting, pressing Magisk give the message 'Abnormal State. An "su" command that does not belong to Magisk is detected. Please remove the other unsupported su'. But to remove the other su I need root. The Kingoroot doesn't work anymore. After pressing /system/xbin/su or /system/bin/su I am still shell. Pressing on SuperUser give the message "SuperUser isn't responding. Do you want to close it?" or just shows a white and later black screen. Pressing "Kingo ROOT" begins with a increasing percentage, but stops at 54%.
Also the su of Magisk doesn't work. /sbin/su blocks. Nothing is shown on the smartphone display.
EDIT:
Even though I didn't have root, I could still restore the system images by Magisk. After a reboot Kingoroot's su worked again. Thereafter I patched with Magisk and before rebooting I removed /system/sbin/su, system/bin/su and /system/xbin/su and daemonsu. I had first to
mount -o remount,rw /
[email protected] /system
and
chattr -i su;chattr -a su
for all the su's and daemonsu. Thereafter I could remove them all.
Then I rebooted.
Still the su of magisk blocked without showing anything on the screen.
So, this is more of a Magisk problem.
Restoring system images again seemed to be the only solution. Kingoroot did gave me root again.