Breakage upgrading to Home Assistant Core 2026.4.0 (with temporary fix)

[hrfried]

Creating a bug report/issue

• I have searched the existing open and closed issues

Required Information

• DietPi version | 10.2.3 (probably affects all versions)
• Distro version | bookworm (probably affects all versions)
• Kernel version | Linux DietPi8G 6.12.75+rpt-rpi-v8 (probably affects all versions)
• SBC model | RPi 4 Model B (aarch64)
• Power supply used | Irrelevant
• SD card used | Irrelevant

Additional Information (if applicable)

• Software title | Home Assistant
• Was the software title installed freshly or updated/migrated? Upgraded from 2026.3.4 to 2026.4.0
• Can this issue be replicated on a fresh installation of DietPi? Probably

Steps to reproduce

1. Upgrade home assistant core to 2026.4.0
2. Failure to start services

Expected behaviour

• home-assistant.service should load normally

Actual behaviour

• Failure to start home-assistant.service

Extra details

• See ha core bug report: Home Assistant Core (venv installation) fails to start because it incorrectly loads the hassio integration during bootstrap. home-assistant/core#166976
• Temporary fix (thanks to user a323870 who I'm not tagging, as they may not want notifications from this repo) : try/except importing IngressPanel

Example diff that allows homeassistant to work correctly after upgrade to 2026.4.0:

--- /home/dietpi/backups/ha-core-2026-4-0-issue_2026-04-01/addon_panel.py       2026-04-01 11:55:41.446406790 -0400
+++ /home/homeassistant/.pyenv/versions/3.14.3/lib/python3.14/site-packages/homeassistant/components/hassio/addon_panel.py      2026-04-01 11:59:07.554406667 -0400
@@ -4,7 +4,10 @@
 import logging

 from aiohasupervisor import SupervisorError
-from aiohasupervisor.models import IngressPanel
+try:
+    from aiohasupervisor.models import IngressPanel
+except Exception:
+    IngressPanel = None
 from aiohttp import web

 from homeassistant.components import frontend

Creating mostly for visibility as it's really an upstream problem.

[MichaIng]

Better workaround:

sudo -u homeassistant bash
source /home/homeassistant/pyenv-activate.sh
pip3 install aiohasupervisor

It was pre-installed as core dependency before. Now it is a dynamic hassio component dependency only, and these are obviously installed too late, after hassio is tried to be loaded explicitly by core.

EDIT: "better" means in terms of maintainability here, since aiohasupervisor is and might be loaded in other places, so that patching one code section will likely break soon. But of course, since Supervisor is not used, best would be if core did not try to load it (hassio as a whole) unconditionally at all.

[MichaIng]

Upcoming HA release will fix it, even the best way I could have imagined 👍.

[elchmartin]

Thank you very much for this fix!
Kinda gave me headache thinking if my current platform is a good idea to keep for the future.
But turns out it is :-)

What I did:

• login as root
• ran 'dietpi-software reinstall 157'
• waited patiently
• did the above workaround by @MichaIng
• rebooted
  All working fine again now.
  Some peace of my through 'dietpi-backup' and a backup of my DietPi-HA-Instance within ProxMox.

[MichaIng]

HA release PR is also up in the meantime: home-assistant/core#167310