Hello, I have been going through these forums and others learning all that I can about input lag.
I just got an LG 50pk750 and thought to hook my laptop pc up to it. My laptop specs are: Intel core 2 duo 2.8GHz, 4 gigs ram, and Geforce GTX 260M Cuda 1 gig GPU.
The problem I am experiencing is somewhat delayed mouse movement when plugged in through VGA. It isn't a huge difference but it is noticeable. I am not entirely sure if it is just the difference between having such a huge screen to move my mouse across and a regular 22" monitor.
I have noticed the same problem on my parents Samsung LED-LCD (don't know the model, >50" and was in lower 2k range a year ago) when plugged in through HDMI.
I have turned it on to game mode and turned off all the image processing on the tv. It feels normal on my XBox which I thought may just be the difference between playing with a gamepad versus a mouse, but when I played with a USB SNES controller on my computer it felt laggy again.
I have tried to actually quantify the effect with a 30fps stopwatch on both screens but the shutter speed on my camera phone isn't high enough to say anything for sure, though it looks like it may be a little behind.
Is the problem my TV or my computer, and is there anything I can do about it?