"wake for network access" not working

Same issue here. MBP not waking from sleep for AppleTVs and not visible to other Macs on the network.

Wake for network access is checked.

Wifi is off, connected via ethernet to Airport extereme.

I am experiencing the same problem with Wake For Network Access not working under Lion.

I have the same setup as jefferey.

After upgrading to Lion.

My issue is slightly different on my mac mini when network access switched 'ON' it will not wake from sleep using the keyboard or mouse, i have to press the power button once. This does wake the computer but mouse and keyboard do not respond, the only solution i have found is to reboot by holding in the power button.

I've been having problems with wake for network access on Lion as well. Similarly to others, if my iMac has recently gone into sleep mode, then it will wake up for Apple TV use or for file and screen sharing from another computer. After an extended period of time, however, all such functionality disappears.

I've been rooting around in System Profile and have found something that may be of interest. Under the Hardware section, in the Power menu, there is a parameter called 'PrioritizeNetworkReachabilityOverSleep'. On both my iMac and Macbook this is set to zero (i.e. 'no').

Does anybody have any idea what it means? And if there is any way to change it? If I had to guess, it sounds as though there is a setting somewhere in the system configuration (thought apparently not visible from the GUI) that sets the computer to remain in sleep mode rather than briefly waking to maintain its registration with the relevant Bonjour sleep proxies.

Hopefully we'll be able to get to the bottom of this, as over six months after Lion's release the problem has yet to be resolved by Apple through version updates, something that is especially frustrating given how excellent a feature wake on network access is when it can be reliably coupled with an Apple TV or Back to my Mac.