ATI Radeon Sapphire 6850 | Screen Tearing/Flickering Line in HDMI LED when using duplicate/mirror screen with monitor

mmauro_16

Reputable
May 8, 2015
2
0
4,510
Hi all,

I'm having this problem (it's like a flickering horizontal line -> http://en.wikipedia.org/wiki/Screen_tearing) since I bought the TV and connect it through HDMI together with a DVI Samsung monitor.

The only ways I found to temporaly resolve this are:
- Using the extend screen option. I find this annoying because the screens are in different rooms of my house.
- Set as Enable and then as Disable again the "GPU up-scaling" for the monitor.
I can't Disable that value for the TV, I think it's because is connected through HDMI and needs this.

I've read lots of threads and also try from CCC (last version 14.9), without any success:
- To change the pixel format to Y:4:2:2
- To disable LCD Overdrive for both screens
- To enable the overclocking option and setting everything (GPU and RAM) to minimun
- To set Always on for the v-sync from 3D options
- To set Always on for the v-sync in 60htz, from the RadeonPro program.

Could anyone help me to fix this so I can continue duplicating the screens without any tearing in the LED TV, please?

Thank you very much for your time and any suggestion!
 

MajorTom2011

Distinguished
Sep 10, 2011
13
0
18,510
I had this exact same problem for a long time with the exact same card and I could never fix it. I ended up buying a new card (an R7 260x) and the problem persisted. I finally fixed the problem by instead of using a male-male HDMI cable to connect to the TV, I used a DVI to HDMI to do it (DVI connects to the card and HDMI to the TV), the monitor is connected with a normal male-male DVI cable. I'm not entirely sure if the DVI-HDMI cable will transmit audio though, I haven't tested that.
 

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