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Since a few weeks it seems that my laptop, after being locked for a few minutes, will kill the network connection. Every time I return to my it after it being locked for a while, I see apps having to reconnect, or tasks that have failed because lack of network connectivity. It happens on both wired and wireless connections.

Is there a way to disable this behavior? I've looked in Windows power settings, and NIC settings, but haven't found anything.

I'm working on a Surface Pro 3 with Windows 10 version 1703 build 15063.413

DavidPostill
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CJ Scholten
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  • How long have you been away from the device? Could it be that it switches to standby/hibernation? – Seth Jul 06 '17 at 11:35
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    Have you checked wireless network Adapter in power setting. You can also find the setting related to your issue in Wireless or Ethernet Adapter Configurations. i.e Power Management – Chandra Sekhar Jul 06 '17 at 13:11
  • Standby/hibernation is set to 'Never'. Also the setting to disconnect network when in standby is set to 'Never' – CJ Scholten Jul 06 '17 at 19:02
  • Possible duplicate of [How do I stop Windows 10 going to sleep after locking with Win+L key](https://superuser.com/questions/1153162/how-do-i-stop-windows-10-going-to-sleep-after-locking-with-winl-key) – GolezTrol Apr 30 '19 at 07:24
  • Not sure if the last mentioned setting corresponds to the [toggle](https://techcommunity.microsoft.com/t5/surface-it-pro-blog/surface-power-management-with-modern-standby-in-windows-10/ba-p/328897) between disconnected and connected (modern) standby... Anyway few weeks from July 2017 seems to match a [certain](https://support.microsoft.com/en-us/surface/surface-pro-3-update-history-78dc8c2a-97ba-fd87-f24f-ed76e8a66a38) undefined update to improve sleep battery life. – mirh Jul 26 '23 at 11:16

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This may be because of a "System unattended sleep timeout" setting that is normally hidden, and that causes a locked computer to sleep even when the "Sleep" setting is set to "Never".

See this answer to a similar question.

Per the link above, the System Unattended Sleep Timeout setting is made available in your power settings if you set the DWORD attribute of the following registry key to "2":

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\238C9FA8-0AAD-41ED-83F4-97BE242C8F20\7bc4a2f9-d8fc-4469-b07b-33eb785aaca0
Mark
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