PI 4 WIFI Sleep Issue

[susserj]

Describe the issue you are experiencing

Description:
I believe the HA OS is not preventing my PI4 WIFI adapter from entering sleep mode and this is creating connectivity issues. I had a similar issue with several of my other PIs but the method for turning off this unwanted sleep functionality doesn't seem to be currently available in your HA OS.
Version of HA OS: 16.3
Hardware PI4
Connectivity: WIFI built in adapter

Symptoms:
“Multi‑minute unreachability over Wi‑Fi that eventually ‘wakes’” and absence of clear power‑save logs; note that iwconfig/nmcli aren’t available on HA OS, and ha network shows IPv4 static and IPv6 disable.

Reproduction:
Time window (e.g., after idle periods), steps you take (open HA in browser), observed delay (~3–5 minutes).

Expected vs actual:
Expect continuous responsiveness; actually see deep sleep behavior with delayed reconnection.

What operating system image do you use?

generic-x86-64 (Generic UEFI capable x86-64 systems)

What version of Home Assistant Operating System is installed?

16.3

Did the problem occur after upgrading the Operating System?

No

Hardware details

P4

Steps to reproduce the issue

1.The problem seems to occur when the system is not accessed for a few days.
2.
3.
...

Anything in the Supervisor logs that might be useful for us?

6-rc: info: service s6rc-oneshot-runner: starting
s6-rc: info: service s6rc-oneshot-runner successfully started
s6-rc: info: service fix-attrs: starting
s6-rc: info: service fix-attrs successfully started
s6-rc: info: service legacy-cont-init: starting
s6-rc: info: service legacy-cont-init successfully started
s6-rc: info: service legacy-services: starting
services-up: info: copying legacy longrun home-assistant (no readiness notification)
s6-rc: info: service legacy-services successfully started

Anything in the Host logs that might be useful for us?

My Motion Eye system is currently down. But I don't think this is reason for the problem. I think the wifi adapter is going to sleep, which seems to be a frequently observed problem when this software is running on PIs that like to put their wifi adapters to sleep.

System information

No response

Additional information

No response