I have a remote desktop session to a Windows 7 Workstation that keeps timing out/disconnecting after a minute or two of idiling. Also, sometimes it disconnects while I am in the middle of using it.
I have tried turing off all NIC power saving options, the sound option for remote desktop, and all the go to sleep power saving options. I don't have any issues with remote desktop connecting to various Windows Server 2008 R2 Machines and VMs.