Losing Network Connection during Sleep

We only have one user using Vista in our company and he seems to be having this odd problem. He loses his network connection whenever his computer goes to sleep, or when the screen saver comes on. I have done a bit of research on the matter and have disabled the device's ability to 'turn off to save power'. I have also uninstalled and reinstalled all network drivers for the PC. Neither of these solutions seemed to work. Normally, I would be content to just disable Sleep mode on the PC, but whenever the group policy screen saver kicks in, it seems to lose the network connection as well. When he comes out of Sleep, there is no network connectivity for at least a few minutes. He has to close and reopen Outlook in order to check his messages
agruber85Asked:
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Michael KnightCommented:
If you've verified that the NIC isn't powering down with other components during sleep here:
control panel>>device manager / network adapters>>right click on connection>>Properties>>Power Management remove the check for the box
"allow this computer to turn off devices to save power"
If that's OK you might try disabling ipV6 I've seen it matter on some Vista/7 Boxes:
http://www.mydigitallife.info/2007/09/09/disable-and-turn-off-ipv6-support-in-vista/ 
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AnnOminousCommented:
This seems clear to be an issue with the NIC at least ignoring the 'Do not turn off device to save power' switch, or another switch acting in the same way.

There may be a device driver level option that does the same thing. Check there first. If you have another system with the identical hardware, look for variation in the device driver options, and then in the OS level options.
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Michael KnightCommented:
What Mfr. of card/hipset is this? Have you tried tweaking the NIC speed?
Right click on the Connection>>Configuration>>Advanced>>Speed and Duplex. Change from auto to 100 MB Half or 10 MB Half. If it works, bump it up to 100 MB Full or 1000 MB Full.
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agruber85Author Commented:
Ok, I just wanted to double check that I had indeed disabled the "allow computer to turn off this device to save power" option and it somehow reenabled itself. Is there some sort of setting that I am missing? I know for a fact that I disabled the setting before, but now it seems to be enabled again. Any thoughts?
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AnnOminousCommented:
The switch in the UI is probably reflecting a setting in the registry or the drive. If something else resets it (or it does not change) then then next time you reboot and check it will be the old value.

First turn off the setting. reboot, confirm it is still off and verify that the problem does not recur.

If it does not recur, then you only need to resolve why the switch is turning on.
If it recurs anyway when the switch is off, spend your time looking elsewhere.
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Michael KnightCommented:
Could be that BIOS is overriding as well...as in you tell Windows to turn that off, but on reboot BIOS tell windows to turn it on?
Is the power off option set for everyone in the GPO? You stated that the GPO screensaver causes this as well, check that group policy.
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agruber85Author Commented:
Ok, yeah after reboot it seemed to have taken the change, but I still lose the network connection

To answer your question, the Mfr of my Network Adapter is Intel.

Also, the only option that we have set for the Group Policy is the screensaver, all the other ones are not used. Any other ideas?
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
Two things are causing that at my Vista box:
  1. The WLAN NIC driver is crashing when waked up, and restarting after one minute (recovery option in the service I use for that NIC)
  2. DNS Cache service not working after network changes. This is an issue which leads to unresolvable DNS - nslookup works, but nothing else using a DNS address. Workaround is to restart that service.
My WLAN NIC is powered off on sleep, not caring about the same option as you have already looked for. You are not alone ;-).
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agruber85Author Commented:
michaelaknight: I just tried tweaking the NIC speed to no avail. It did not seem to help. Is there some sort of registry setting that can be altered to force it to not turn off the device to save power?

AnnOminous: How can I try to set the device driver level options that you referred to before?

Qlemo: So you have not been able to find a solution to this problem? Is it just another Vista bug that doesnt have an answer?
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
I can't tell if is Vista or the NIC manufactor's fault, but no, I have no solution, searching for one year now.
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agruber85Author Commented:
Do you have an Intel NIC? because that is what this user has and no matter how many times I have reinstalled the driver or searched for a new one, it does not seem to help...
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
No. Something you won't know ;-). Since it is WLAN via USB Stick, using own software for connecting, it is, ehm, different. But it is a very common config here in Germany.
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agruber85Author Commented:
Aha, gotcha.
Anyone else have any other suggestions on how to fix this issue? Or is it something that does not seem to be addressed and I will just have to deal with it being annoying?
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AnnOminousCommented:
Device driver level settings are exposed in the driver details panel in device manager. Not every driver offers configurable options, but this is where you could set them.

Have you tried checking with the NIC manufacturer web site to see if you have the latest driver. Windows Update often does not expose the latest versions, and OEMs seldom do. You need to check the manufacturer site (e.g. Realtek) to confirm the latest version.
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