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After 30 minutes my Windows 7 PC goes to Standby. Problem is, when I get it back to normal, Wi-Fi is disconnected. And it doesn't just reconnect and come back in 10 seconds. For example, when I start it up, I have to click on the Wi-Fi symbol, select the Wi-Fi and connect to it. This takes much longer and made me think about disabling standby alltogether - not the best solution.

Some information:

  • The PC is a standard desktop machine, no laptop.
  • There is no additional power management software installed.
  • The Wireless Network Adapter (Atheros AR5005G) is set to not being able to be deactivated to save energy in Device Manager.
  • The Wireless Network Adapter uses no special softwar from Atheros, only the driver that was installed by Windows itself
  • Control panel > Power options > Change plan settings > Change advanced power settings > Wireless adaptor settings > Power saving mode = Maximum Performance

Any idea what could cause this behaviour? How can I stop it from losing Wi-Fi or reconnect normally?

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Sounds like your power mangement software is turning the device off. –  Ramhound Sep 30 '13 at 12:51
    
There is no power management software installed (that I know of. Couldn't find any looking through Programs). This is a desktop PC, so also no special BIOS stuff going on, I think. –  Jan P. Sep 30 '13 at 12:56
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Clarify your question with that informat. Windows comes with power management tools so I would double check device properties. Update your question with all information learned by doing this. –  Ramhound Sep 30 '13 at 12:58
    
Any way to export this configuration stuff in a sane way? Additionally I'm on German Win7, the translation of the normal options are horrible so I'm having problems connecting the English names to the German ones... (e.g. "Deaktivieren" = "Standby" sometimes) –  Jan P. Sep 30 '13 at 13:00
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I suggested you just confirm what the device does when the computer goes to sleep which can be found on the properties of the device itself in Device Manager. I suggested you clarify your computer isn't a laptop in the question itself. –  Ramhound Sep 30 '13 at 13:12
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2 Answers

I cannot believe this, but after months of trying to fix this, it turns out that, for me, checking ON (enabled) the "Allow the computer to turn off this device to save power” worked.

Got this idea from Intel’s My WiFi Technology stops working after resuming from sleep or hibernate in Windows 7. My guess is that the driver expects to turn the network card back on after sleep or on a cold boot, and because the option is turned off, it toggles the "switch" from being already on to off. Maybe?

Anyway it works for me now, perfectly.

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Seems completely backwards, but worked for me too. –  Paul Apr 13 at 1:17
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Apparently, disabling a Windows power saving option causes a family of Intel drivers to malfunction. I was able to solve this issue on two Intel network card-equipped Lenovo ThinkPads. So if your computer also relies on an Intel WiFi network card, I'd suggest you :

  1. Go to the Windows Control Panel
  2. Click on System
  3. Select the Device Manager
  4. Right-click on your Intel wireless device and choose Properties
  5. In the tab Power Management, enable the option Allow the computer to turn off the device to save power.

This solved my problem. As I am not using an English version of Windows, let me know if you can't find those menus.

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