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Thread: No network after wake from lock in Vista

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    No network after wake from lock in Vista

    This is bugging me now.

    If i lock my pc and come back with in say half an hour all is fine and i have network and internet.

    When i come into work in the morning and wake from lock i have no network or internet.

    A quick reboot solves the issue but this is not ideal.

    It only recently started to do this, say for a month now.

    The pc does need to be on since we do all the updates company wide over night.

    PS IT guy has no clue.

    The basic windows diagnose and repair just comes with, may not have a ip

    Any ideas guys and gals.

    PS was not sure whether to post this here or in network, feel free to move if required :-)

    ED

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    Senior[ish] Member Singh400's Avatar
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    Re: No network after wake from lock in Vista

    Sounds like power saving is kicking in on the NIC and turning it off to save power. Just change the power savings settings in Device Manager.

    Look for a checkbox that says something like "allow computer to turn off device to save power", and remove the tick/check.

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    Re: No network after wake from lock in Vista

    cheers for the reply.

    I already have that unticked so i can VPN in after hours.

    Any other ideas

    ED

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    Senior[ish] Member Singh400's Avatar
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    Re: No network after wake from lock in Vista

    Could be just the lease expiring on it. Try ipconfig /renew next time it happens.

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    Re: No network after wake from lock in Vista

    I have swapped out the network leads to see if that helps but i'll release and renew in the morning.

    I may pop in a NIC card, i'm sure we have a few lying about. See if the onboard one is playing up.

    ED

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    Re: No network after wake from lock in Vista

    I had that problem with an onboard Marvell Yukon NIC on a previous system - waking from sleep after a few hours' snoozing meant no network.
    Workaround was to reboot or disable & re-enable the NIC.

    Same machine, different NIC (so different chipset & driver) - no problem.
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    Senior[ish] Member Singh400's Avatar
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    Re: No network after wake from lock in Vista

    Hmmm, I've got a Marvell Yukon onboard NIC and I've not experienced anything weird at all..

    @k4p84: What make and model is the onboard NIC?

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    Re: No network after wake from lock in Vista

    I've seen this a couple of times in XP but no idea why.

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    Re: No network after wake from lock in Vista

    Its the onboard network connection on a Dell Vostro 200, it shows up as an Intel 82562v 10/100 network connection in device manager.

    If i open network connections and disable the device then enable it, open cmd window and ipconfig \renew i get an ip and all is good.

    If i do a release and renew prior to disabling the device i get a 169 ip address.

    A bit of googling throws up this :

    ''Apparently in Windows 95 OSR2.x and Windows 98 there is a feature called IP Autoconfiguration. When the installed NIC is not being used...it defaults to DHCP. When you log onto a network it then attempts to find a DHCP service. If it can't find one... the IP Autoconfig feature kicks in and assigns it a random ClassB IP address using the subnet 169.254.x.x ( a Win9x TCP/IP stack default I believe). The registry key for this is located at :

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VXD\DHCP\Dhcpinfo00 The key value is AutoIPConfigurationAddress. ''

    Yes that does say Win 95 but it still a start. Now off to more investigating.

    Its just very strange that this only happens to my pc and none of the other Vostro 200's...

    ED

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    Re: No network after wake from lock in Vista

    Yep, that 169.x.x.x address is an APIPA address - for when DHCP is selected but there was no DHCP server found when trying to initialize the networking stack.
    It's moderately better than the old method of everyone getting 0.0.0.0

    The symptoms you are describing match exactly what I was having, and I never managed to figure out what it was - only that it was specific to the Marvell Yukon NIC on the mainboard and didn't affect the Broadcom one.

    The strangest thing is that "if you wake the computer up soon after it sleeps, it wakes up perfectly fine" - if it was software I would expect it to be consistent, but this smacks of a hardware/sleep state issue on the device.
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    Re: No network after wake from lock in Vista

    Well it does seem to be a known issue with the controller i have.

    Good news we have Dell 24 hour replacement............... enter service tag etc.

    Wonder if they'd be cool with just sending out a motherboard and i'll fit it. Then i have no down time plus i dont have to rebuild the blasted thing again, OS wise...

    ED

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