When I updated to Android 4.1.2 on my Galaxy Nexus, I lost root. Everything is still there, but the permissions on
system/bin/su no longer include the
setuid bit, which prevents
su from working.
I don't want to go through the whole re-rooting process if possible since I used root to re-lock the bootloader and unlocking it without root will wipe the entire phone, including
As far as I can tell, the only thing I need to do to get root back is to fix the permissions of
su. How should I do this?
Of possible relevance:
- I'm using the stock ROM.
- The phone is the international GSM version.
- I tried to get into recovery and got an android with a red exclamation mark. Is this due to the bootloader being locked or is it a different problem?
- Since the update and losing root, a process called
system_servicehas frequently started comsuming 100% of my CPU and slowing my phone to a crawl, forcing me to reboot.