thefivetheoryIm not sure about IPS but on VA panels they have a t-con with 1 or 2 input(s) (LVDS) and 2 outputs to the vertical-scaler (panel driver)
so its a single panel that has 2 cables driving it so half if it can go out
the middle bottom board on this
DrewYeah it seems to have lots of tearing and judder issue. I'm glad that I'm not the only one experience this. Perhaps it's due to slow refresh rate, but then I've turned on vsync and triple buffering, this screen tearing still persists...
HueyLeYou using HDMI or DP? I know HDMI is lower refresh. Depending on Video Card it can kick down as low as 30 and max out at 50, which would make it more likely to see tearing ...
DrewOn my HP 2560x1440 27" monitor I had tearing on my desktop (older nVidia) , but not on Late 2013 rMBP with same monitor.. I have to wonder if this is a Video card issue. I wouldn't assume it's a monitor issue directly w/o some further testing. These monitors do push close to 4k requirements.
TimGNot that close, it's about 60% of pixels of a 4k monitor. Did not observe any tearing on mine but I do have an issue with putting monitor to sleep, it refuses to do so. There's sort of a feedback with computer, when it tries to shut it down after a bit of inactivity, monitor stars flashing on and and off and when I touch the mouse/keyboard, all windows are resized as if the screen resolution was reset to about 1/10 of the native one. I've got nvidia, win 8.1, and DP connection.
TimGI'm not getting horizontal tearing, I'm getting a tear down the middle of the screen similar to the issue above where half the screen awoke from sleep but the other didn't.
DrewAh, my 2560x1440 HP screen would only show half the screen when I didn't use the proper Duel-Link DVI cable, had a bad cable, or on a video card that was not compatible in an attempt to work. Have you tried with a different DP cable? I'd also try on a different system, see if you get same results.. At this point all you can do is troubleshoot to see if you get same, consistent, results using different hardware/cables. If so, I'd defiantly call LG's business support to see about a replacement.
so its a single panel that has 2 cables driving it so half if it can go out
the middle bottom board on this
(1 lvds input & 2 panel driver outputs L & R)