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Wake on LAN only works for a few minutes after TV is turned off?


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Asking this hear, since I could not seem to find a better place... Wake on LAN only works for a few minutes after TV is turned off?  If I turn of LG TV (WebOS 8.x) and then send a Wake on LAN (WoL) packet, it works.  If turn off the LG TV, then I wait about 15 minutes or so, then send the same WoL sequence, using the same code, script, etc., it fails, the LG TV never turns on.  THe LG TV is configured both for wired ethernet (preferred) and WiFi.  Any idea why this behavior?  It almost seems like the LG TV goes into standby, via phone app, remote, even CEC, etc., then drops from the network?  Mobile is enabled on the TV, hence the phone app works.  Why would the LG TV stop responding to WoL packets?

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OK... Got this all sorted out.  The wired and wireless connections drop, after the TV is in standby mode, in about 2-3 minutes.  If you ping the TV interfaces, they just disappear from the network 2-3 minutes after power off/standby.  Thus for WOL you have to do a broadcast via x.x.x.255 and use the applicable MAC address.  This, at least on my LG TV, is consistently working.  If you try to use the IP address versus broadcast, this only works, until the interfaces drop of the network.

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