Rooted but su says "Permission denied"

android su
Stefan picture Stefan · Sep 2, 2015 · Viewed 34.9k times · Source

I have this "old" Lenovo A2107 tablet which I rooted years ago (using a download from http://androidforums.com/threads/a2107-root-mods-and-rom-discussion.661261/, tho running its root.bat script by hand from my GNU/Linux machine) and that worked fine.

Then I passed this tablet to my daughter for a couple years, and now I got it back.

/system/bin/su is still present, still the same date and size, still mode "rwsr-sr-x", still the same firmware (Android 4.0.3) so all looks fine, but when I try to run it from a shell, it just tells me "Permission denied".

Any idea what might be going on? What I could try to do to track it down?

Answer

Vadzim picture Vadzim · Jan 28, 2018

Nowadays Magisk is commonly used for rooting.

I've found that on my Oneplus 5 (Oxygen OS, Nougat) it was sufficient to go to Magisk Manager app, open superuser permissions screen and toggle Shell (com.android.shell) to resolve the adb su permission denied problem.

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