If I install Ubuntu on the Nexus 7 (following the instructions at https://wiki.ubuntu.com/Nexus7/Installation), and later uninstall it, will the device be in the original state, or will there be traces left behind?
I'm especially concerned about the following:
- Do I void the warranty? (In practice, not strictly legally. Can I bring the re-flashed device back to the store and pretend it's original?)
- Can I re-lock the bootloader?
- Are there 'fuses' or tamper detection switches that tell that there was once something else installed?
- Do I loose features in Android if I once unlocked the bootloader or installed Ubuntu (like being able to play DRMed videos)?