Sunday, June 26, 2016

Understanding root loss, samsung security updates, and SuperSU 2.65 vs 2.74

I recently used the "New Root Method For 5.1.1 w/o custom kernel" to root my otherwise stock Note4 SM-N910T.

Everything was fine, but after a few weeks I lost root. I was able to get it back by re-flashing SuperSU 2.65 from recovery.

After further research, I found the blog post by Chainfire on SuperSU 2.74, and understand that 2.74 addresses the Samsung security update.
I've been using "SuperSU 2.65 Stable" because of root access compatibility issues with some programs.

How do I know if the Security Policy update was the cause of losing root? My phone's About Device has "Android Security Patch level" as 2015-11-01. So it doesn't look like something that was updated in the last week.
If it was not the security policy, then what caused the loss of root?

I have automatic updates off, and did not update anything at the time I lost root. Is there any other way that an update or change can be pushed? My /data/security/spota folder is empty. Should I delete the empty folder just to be sure?


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