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Troubleshooting

Symptom Likely cause What to try
UEFI “Access Denied” / boot loop Secure Boot / Pre-Enroll keys Shut down; Hardware → EFI Disk → Edit and disable Pre-Enroll keys; or recreate the EFI disk with pre-enrolled-keys=0
Boots into UEFI shell or PXE Wrong boot order / no disk Confirm scsi0 exists and boot: order=scsi0 in qm config
import-from path error Wrong path or missing extract Check /var/lib/vz/template/haos_ova-*.qcow2 exists; use absolute path
Import storage error Wrong STORAGE Match What you need tabs (local-zfs vs local-lvm)
Checksum FAILED Truncated download Delete .xz, download again, re-verify
unxz: command not found Missing xz tools apt-get install -y xz-utils
No IP in console Bridge / VLAN / cable Confirm net0 on vmbr0; same LAN as DHCP; check qm agent … network-get-interfaces
homeassistant.local fails mDNS blocked across VLANs Use the guest IP from the console or guest agent
:8123 refused / endless preparing Still first-boot Wait up to ~20 minutes; watch console; retry curl
Guest agent “not running” Agent off or guest not ready Enable QEMU Guest Agent in Hardware; wait until HAOS finishes boot
USB dongle missing in HA Not passed through Hardware → Add → USB Device; restart VM
Disk too small later 32 GB default Hardware → Disk → Resize Disk; reboot HAOS
Prefer the older two-step import Habit / older docs qm importdisk 100 /path/to/haos.qcow2 $STORAGE then attach the unused disk in Hardware and set boot order

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References