I have an answer to this. I had the problem, then I found the solution and now I'm sharing it:
Problem: I tried to put SuperSU on my M9 with CM-13 because I thought I needed root (you don't, under developer options there is the ability to turn on root essentially). So I flashed SuperSU from an apk and then it auto-updated itself then rebooted and got in a start up loop! Now I couldn't access the phone via adb, I'm not sure why. I think USB Debugging was off, but I'm not sure. AND I had not installed SuperSU from a zip so I didn't have that file laying around! So I went and got the latest SuperSU which I heard would work (it did) here: http://download.chainfire.eu/969/SuperSU/ THEN....how do I get it on my phone? I mean, who has a micro-SD reader laying around...not me today.
I DID have fastboot working but not adb. SO....I went into my phone and launched recovery mode then I chose this new thing called "adb sideload." That turns ON MTP so your phone comes up technically on your PC via USB but it doesn't show under my computer. But then I was able to go to my command prompt and type "adb-killserver" then "adb sideload NewSuperSU.zip" and it loaded!!! And I could then boot in!
Now I'm sure I shouldn't have SuperSU running but at least now I can put all the needed binarys (like CM and gApps to get started if I needed to from scratch) on !!!
So it works now.
Problem: I tried to put SuperSU on my M9 with CM-13 because I thought I needed root (you don't, under developer options there is the ability to turn on root essentially). So I flashed SuperSU from an apk and then it auto-updated itself then rebooted and got in a start up loop! Now I couldn't access the phone via adb, I'm not sure why. I think USB Debugging was off, but I'm not sure. AND I had not installed SuperSU from a zip so I didn't have that file laying around! So I went and got the latest SuperSU which I heard would work (it did) here: http://download.chainfire.eu/969/SuperSU/ THEN....how do I get it on my phone? I mean, who has a micro-SD reader laying around...not me today.
I DID have fastboot working but not adb. SO....I went into my phone and launched recovery mode then I chose this new thing called "adb sideload." That turns ON MTP so your phone comes up technically on your PC via USB but it doesn't show under my computer. But then I was able to go to my command prompt and type "adb-killserver" then "adb sideload NewSuperSU.zip" and it loaded!!! And I could then boot in!
Now I'm sure I shouldn't have SuperSU running but at least now I can put all the needed binarys (like CM and gApps to get started if I needed to from scratch) on !!!
So it works now.
