Thinkpads Forum

I discovered this today:

When your X61s goes into hibernation and then back to windows the network card is turned off, you'll have to disable it and then enable it to make it work again.
Is there any patch or fix for this problem??

There are two types of network cards, LAN and WLAN, you don't mention any specific one.

Anyway, don't allow your machine to turn off the card for power saving purpose:

My Computer > Right Click Properties > Device Manager > Network Adapters > Right click Properties on the network > Power Management > uncheck "allow the computer to turn off this device to save power"

Also, look into the following:

Deep Smart Power Down issue.