In my attempts to get a home built kernel running on my phone I’ve had quite a few times where things haven’t quite worked and I end up stuck at the HTC screen. As there isn’t any output via USB at that point it’s frustrating to know what the problem is, but there is a solution…
- Power off the phone (remove the battery)
- Start the phone in recovery
- Use adb to view the dmesg
This gives you the previous boot dmesg and hopefully more information about what went wrong 🙂