Iwlwifi_doesn’t_return_after_s3_suspend

From: Steven Harms (High-Security Mail) <sgharms_at_stevengharms.com>
Date: Fri, 27 Jun 2025 20:11:40 UTC 
Hello FreeBSD wireless developers,

I'm encountering a recurring issue with the `iwlwifi` driver on 15.0-CURRENT after suspend/resume.

Upon resume, `wlan0` appears to recover: `ifconfig wlan0` shows that the interface is associated and has an IP address. However, all outbound network traffic fails—e.g., `ping` reports "no route to host."

Running:

service netif restart

restores network connectivity. I’ve since added calls here into rc.(suspend|resume) as a workaround.

From `/var/log/messages`, suspend and resume events appear clean. Here's a representative snippet:

Jun 25 14:58:04 homebsd kernel: iwlwifi0: ...
Jun 25 15:02:33 homebsd wpa_supplicant...
Jun 25 15:09:53 homebsd acpi...
Jun 25 22:52:23 homebsd syslogd:...

System details:
- FreeBSD 15.0-CURRENT (built from source) this week

This is on a Thinkpad T14 Gen1. I’m not sure what chip data might be needed (or whether that’s required). Please LMK.

I'm happy to provide full logs, run patches, or assist with any debugging steps that might help.

Thanks for all the work on bringing native Intel wireless support to FreeBSD—it’s much appreciated.

Best regards,