CalDAV integration not supporting ipv6: add information to integration page

[maduzl]

The problem

The current core CalDAV integration is not supporting ipv6 which leads to long loading time of the integration without any specific error message resulting in non existing calendars in home assistant. (When using with iCloud in my case.)

python-caldav/caldav#393
https://community.home-assistant.io/t/integrating-my-icloud-calendar-into-home-assistant/615213/10 (Comment from Apr 17 2024)

If ipv6 is disabled in HA it works without an issue.

=> Maybe add this information to the CalDAV integration page at Troubleshooting?

What version of Home Assistant Core has the issue?

core-2024.10.4

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

caldav

Link to integration documentation on our website

https://www.home-assistant.io/integrations/caldav/

Diagnostics information

System Information

version	core-2024.10.4
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
user	root
virtualenv	false
python_version	3.12.4
os_name	Linux
os_version	6.6.31-haos-raspi
arch	aarch64
timezone	Europe/Berlin
config_dir	/config

Home Assistant Community Store

GitHub API	ok
GitHub Content	ok
GitHub Web	ok
HACS Data	ok
GitHub API Calls Remaining	5000
Installed Version	2.0.1
Stage	running
Available Repositories	1454
Downloaded Repositories	6

Home Assistant Cloud

logged_in	false
can_reach_cert_server	ok
can_reach_cloud_auth	ok
can_reach_cloud	ok

Home Assistant Supervisor

host_os	Home Assistant OS 13.2
update_channel	stable
supervisor_version	supervisor-2024.10.3
agent_version	1.6.0
docker_version	27.2.0
disk_total	1833.0 GB
disk_used	20.9 GB
healthy	true
supported	true
host_connectivity	true
supervisor_connectivity	true
ntp_synchronized	true
virtualization
board	rpi5-64
supervisor_api	ok
version_api	ok
installed_addons	WireGuard (0.10.2), Advanced SSH & Web Terminal (19.0.0), Studio Code Server (5.17.2), Matter Server (6.6.0), Node-RED (18.1.1), Mosquitto broker (6.4.1), NGINX Home Assistant SSL proxy (3.11.0), Samba share (12.3.2), OpenThread Border Router (2.11.1), ESPHome (2024.10.2), InfluxDB (5.0.1), Grafana (10.1.3)

Dashboards

dashboards	6
resources	0
views	6
mode	storage

Recorder

oldest_recorder_run	18. Oktober 2024 um 06:32
current_recorder_run	28. Oktober 2024 um 13:18
estimated_db_size	184.03 MiB
database_engine	sqlite
database_version	3.45.3

Example YAML snippet

No response

Anything in the logs that might be useful for us?

Setup of platform caldav is taking longer than 60 seconds. Startup will proceed without waiting any longer.

Additional information

No response

[home-assistant]

caldav documentation
caldav source

[issue-triage-workflows]

There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates.
Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍
This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.

[drstil]

The issue is persisting with HA Core v 2025.1.4.

Could this be fixed, because disabling ipv6 is not possible/best when e. g. using matter extensions.

[mib1185]

please enable debug logging, while IPv6 is enabled, then restart the integration, wait 5 minutes and stop debug logging again - download will start automatically - please provide this downloaded logfile.

Note: it is better to drag the log into the comment (which will add it as an attachment) and not copy paste as it is hard to read logs in GitHub.

thx 👍