Strange monitor issue

[SeriousToni]

Dear technical pros of the TDM forum,

 

I have a new monitor since last christmas, but since a few weeks I noticed a strange issue which I don't know why I noticed it not before (if it was already even there). When the screen is moving (by scrolling Google Pictures or by moving in a game) there appears some kind of "refresh line" horizontally on any random position of the screen. Its flickering and never stays completely at its position.

 

I don't know how to describe it so I hope THIS VIDEO can show. From the compression you can barely see the line and you need to watch it full screen, but I hope you can tell.

 

Its really hard to point out from the video and even harder to describe... It's like the screen is only refreshing until a certain point on the monitor and after this point the rest is rendered a little later so it seems to have a horizontal cut that is moving around with every FPS. As I said this does not only appear in games, but also when I scroll down / up. I checked with my second monitor which only has 1024px instead of 1920px and there the lines do not appear. My monitor with the error is an ASUS PB248Q 61,2cm (24,1") which I use together with my old Yakumo TFT via DVI cable on my AMD Radeon R9 200 Series graphics card.

 

Do you have any idea how the problem can be called or even better: what could cause this problem! Because it really sucks and annoys me

[Bikerdude]

Its possibly vsync, have you got it enabled in-game..?

[SeriousToni]

Yes it is activated in the game. But still this would not apply on scrolling in Firefox, would it?

 

EDIT:

F*** I just started the game on my small TFT monitor and I saw there is the same issue, just a bit slighter... So it must either be the GPU or something with the motherboard maybe or the energy?

Edited November 22, 2015 by SeriousToni

[Bikerdude]

have you tried doing a factory reset on the monitor via the monitors menu..?

[STiFU]

I doubt it has anything at to do with the monitor. But a factory reset on your driver settings might be worth a shot. Definitely looks like there are issues with vsync.

[SeriousToni]

No it isnt the monitor since the other one has the same issues. I have the newest drivers - I will try to install an older graphics driver. But Vsinc does only apply in 3d applications, doesn't it? So why do I always have this issue even in Windows?

[Bikerdude]

The AMD gfx driver has a setting for VSYNC in windows as well as in-game.

[STiFU]

I was curious whether windows uses VSYNC and found that apparently the desktop manager does use VSYNC when Aero is turned on.

http://superuser.com/questions/558007/how-does-windows-aero-prevent-screen-tearing

[SeriousToni]

Hm there is no Vsynch option in my catalist suite but I found out something new: When I boot my PC everything works, but as soon as I switch to a Windows basic theme (deactivating Aero Design) the streams occur. When I switch Aero ON again, the streams are gone. It's like in the link from you, Stifu - Aero helps preventing the tearing. So when I run a game with high ressource demand, Windows asks me if it should switch off Aero and if it does, the streams / tearing appears everywhere, EVEN if Vsynch is ON ingame! So somehow the AMD driver doesn't seem to do any Vsynch. So the not-so-perfect-solution would be to never switch Aero off, I guess.

[STiFU]

Now, that's still kinda weird. I get that vsync might happen in windows when aero is turned off, because direct x is not running then. But it IS running ingame, so there, it should not happen. Anyway, glad you found a solution.