Nexus 5 doesn't boot to recovery
Just tried to install the latest KK 4.4.4 and noticed that my phone doesn't boot to recovery anymore. Otherwise, the phone works ok and I can boot to fastboot, but when I try to get to recovery it doesn't load. It does nothing just hangs on a black screen. I tried using the adb reboot recovery
command and the power+volume keys.
Last time I used the recovery was when I installed the 4.4.3 update and everything looked fine.
From fastboot mode I tried to re-flash just the recovery with fastboot flash recovery recovery.img
but as I am completely stock and the phone is locked it failed with error FAILED (remote: not supported in locked device)
Do I really have to unlock my phone to fix this ? Should I send it to Google under warranty ?