EC2 Network Interface & Bootloader Failure Diagnostics
Root cause data extracted from AWS official troubleshooting documentation and kernel engineering references. Click your symptom below to get the exact rescue procedure.
🚨 Step 1: Which boot failure symptom are you experiencing?
Select the scenario that best matches your instance's current state:
Quick Reference Table
| # | Scenario | Key Error Signal | Primary Fix |
|---|---|---|---|
| 1 | eth0 Not Found at Boot | eth0 might fail, causing boot issues | Add net.ifnames=0 to GRUB cmdline and rebuild config |
| 2 | Kernel Deadlock / Hung Boot | sysrq: HELP in Serial Console | Connect to Serial Console → send ~B → press b or c |
| 3 | BusyBox initramfs Drop | /dev/sda1 does not exist. Dropping to a shell! | Re-attach root EBS volume to /dev/sda1 via AWS CLI |
| 4 | PV-GRUB ELF Incompatibility | elf_xen_note_check: ERROR | modify-instance-attribute --kernel <new_aki_id> |