Originally Posted by
JLennerth 
I got the reply from LG about solving gaming lag. I thought I'd share it.
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* Thank you for contacting LG Electronics *
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------Reply to Your Inquiry-------
Thank you for taking the time to contact us. I am delighted to hear from you as our valued customer. I will be more than happy to assist you with your inquiry. We have to ways to solve that issue first I want you to try this.
What resolution is the game consol set on and what is the resolution of the game itself?
Are you using a High Speed HDMI CABLE?
To fix the LAG issue we can try changing the input label to "PC". Ok follow these steps please.
1- Press INPUT to access the input sources.
2- Press the GREEN button.
3- Press the Navigation buttons to scroll to one of the input sources and choose PC.
If that does not work try this please.
1 Press Home to access the Home menu.
2 Press the Navigation buttons to scroll to SETUP and press ENTER.
3 Press the Navigation buttons to scroll to AUDIO and press ENTER.
4 Press the Navigation buttons to scroll to the setting or option you want and press ENTER. - To return to the previous level, press BACK.
-select AV sync.
-If the video and sound are not synced, you can adjust it manually.
»»(-) setting : Make audio output faster than the default.
»»(+) setting : Make audio output slower than the default.
5 When you are finished, press EXIT.
I hope this information is helpful, please do not hesitate to contact us back if you have any other inquiry. I will gladly assist you.
Thank you for contacting LG and please enjoy the rest of your day.