I own a Acer Aspire 7600U but I believe this is a common problem for any system with support for multiple displays. The problem is that when I connect my AIO to a TV and set desktop to clone the image, I get a lot of tearing on the secondary screen, no matter if that is set to be the TV or the built-in screen. I get no tearing if using extended desktop mode, but I really need clone mode to work also. Both screens have the same resolution (1080p) and the same refresh rate (60p Hz). The secondary screen get a stationary tear at about 20% of the height from the top of the screen. Is there any way to get rid of this except using extended desktop mode?
Any way to delay/shift the signal manually so the tear gets fixed at some point where it's not so visible?
Any hardware I can put between the AIO and the TV that synchs the signal some way?
I've found a few sources claiming that using a HDMI-splitter/cloner to two screens with different resolution and refresh rate can solve this problem. But as I have no way of putting a device like this between the computer and the built-in display I can't even test this. Would a splitter between the AIO and the TV solve this even though only using the splitter to one screen? I suspect not...
Any other ideas?
I'm a bit suprised that this problem doesn't seem to have earned a lot of attention from manufacturers since it's still a common problem even though many people use external screens for movies, games etc. It can't be that impossible to solve!?
The TV I'm using is a LG 55LM620T.
Forgot to mention: I have vsync enabled on the graphics adapter and it's working fine for the primary screen. The problem only occurs on the secondary screen because the graphics adapter only can synch the signal to one display at a time. At least that's what I've found out by googling this problem, and it makes sense too.
