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First of all I'm using VMware Workstation, which has it's own Internet connection sharing implemented, but I don't want to use it, as it does not implement the full stack. Things like tracing packet routes in guest operating system don't work.

So I turned this off.

Instead, I shared my wireless connection to VMware virtual network adapter in Control Panel -> Network Connections of the host.

This setup usually works. Sometimes, though, it seems that Windows (host OS) stops sharing this connection for no reason. What works then is disabling the sharing, saving wi-fi connection options and then adding it again.

This happens only when the host OS is returning from sleep (but not always, some sleeps end well).

Can anything be done about it? What's causing the situation?

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Sounds like a driver issue. Check if you have the latest drivers for your wireless adapter, your motherboard, and the latest motherboard BIOS. – allquixotic Apr 30 '13 at 23:59
Stop putting the host to sleep with the VMware machine is turned on... – Ramhound May 1 '13 at 1:05
If you need to do packet tracing, captures, etc., you really should be using bridged mode. – Michael Hampton May 1 '13 at 3:20
@allquixotic, I do. :) – Michal Rus May 2 '13 at 10:26
@Ramhound, that's not an option... I use the VM to code and the host is my notebook. – Michal Rus May 2 '13 at 10:26
up vote 1 down vote accepted

Can you check the Wireless Adapter in Device Manager and see if there is a Power Management tab?

Wondering if maybe the "Allow the computer to turn off this device to save power" could be causing it?

share|improve this answer
Thank you, thank you! That was probably it, because it hasn't happened since I unchecked that option. Thanks! – Michal Rus May 2 '13 at 10:28

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