NUC5i3RYK - WiFi problems when resuming from sleep

[TG1]

I have the NUC5i3RYK with the soldered-on Intel Wireless-AC 7265 adapter. I'm running Windows 8.1 with the latest Intel Wireless drivers (17.14.0).

It connects just fine to my AC router at the expected 802.11ac link speed of ~866Mbps, and shows in Windows Task Manager as an AC connection. The problem is when the NUC resumes from Sleep or Hibernate, the connection consistently drops to 802.11n and max 300Mbps link speed - and I mean every time. Reconnecting to the router doesn't restore the AC connection - only disabling & re-enabling the adapter forces it to quit N for AC. And there is no Advanced option to force only AC connections with this adapter, it seems.

As a workaround, I've noticed that this behaviour can be corrected if the following option is unchecked on the adapter: Power Management > 'Allow the computer to turn off this device to save power'. This is regardless of any Power Profile settings for WiFi.

Oddly, what this workaround seems to do is switch OFF the WiFi card completely on Sleep/Hibernate - because when resuming it can be seen in the tray first switching on the adapter then re-connecting to the router. With the power saving option checked, this doesn't seem to happen - the adapter doesn't cycle and doesn't force a re-connect to AC vs N. So perhaps the power saving option is just backward here?

Has anyone else seen this problem with this card on these NUCs?

[Kevin_M_Intel]

Hello topg,

You reached a different community for this issue so I will pass it to the wireless community and I am sure you will be assisted on this wireless issue.

Kevin M

[jbenavides]

Hello topg,

Thanks for the information you have provided. Even though you already found a workaround, we would like to get some additional details and perform some actions to isolate this issue.

- Please make sure you are using the most recent BIOS and system drivers for you NUC.

https://downloadcenter.intel.com/search?keyword=NUC5i3RYK https://downloadcenter.intel.com/search?keyword=NUC5i3RYK

- Toggle off/on Fast Startup (Hybrid boot), we have seen cases where this causes start-up issues in some devices. You may use the following link for reference:

*NOTE: This link is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.

http://www.eightforums.com/tutorials/6320-fast-startup-turn-off-windows-8-a.html http://www.eightforums.com/tutorials/6320-fast-startup-turn-off-windows-8-a.html

Let us know if these actions change the behavior of the adapter when resuming from sleep.

[TG1]

Thanks for pointing me to the correct forum (wasn't sure with this soldered-on version of the card, tbh). I can confirm that:

1. The latest BIOS and drivers are installed from Intel Download Center.

2. Disabling Fast Startup makes no difference.

Only the Power Management workaround prevents the step down to N from AC on resume from sleep, but unfortunately this also disables the WoWLAN option (it becomes greyed-out).

[jbenavides]

Hello topg,

We are very interested in resolving this situation and would like to get additional details. Please check your private messages for further assistance.