Displayport ghosting

[steveinpelly]

I added a second monitor using a TV/VGA via a Displayport adapter.  All was fine until the monitor broke down

When I replaced the monitor with a Samsung 3000:1 monitor I notice that the text was ghosting (?)  My second machine (same model) does the same thing

Moving the monitor to the VGA port, the monitor works fine.  Just an issue with the display ports.  Diagnostics say drivers are up to date

I use this machine for emergency communications work and multiple monitors are a requirement.

TIA Steve

[BeemerBiker]

Ghosting is caused by improper refresh.

Your 800 G1 has built in Intel® HD Graphics 4600 and an optional

Discrete AMD Radeon HD 8350, 849030, NVIDIA NVS 310, 315, or NVIDIA GeForce GT630 graphics

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I assume you have only the Intel HD graphics and a pair of 3000:1 Samsung

The Intel graphics supports the following

• Graphics Output            eDP/DP/HDMI/VGA
• Max Resolution (HDMI)  4096x2304@24Hz
• Max Resolution (DP)       3840x2160@60Hz
• Max Resolution (eDP - Integrated Flat Panel)‡3840x2160@60Hz
• Max Resolution (VGA)    1920x1200@60Hz

 The 32" FHD Samsung is a 2K (1920x1080) with a maximum refresh of 75hz.

With two of those monitors both at 2K and 60hz if ghosting shows up you will need to select a lower resolution

or select a 24hz refresh assuming the windows 10 driver allows 24hz

If you have only one of those Samsung 3000:1 and some other lower quality monitor you will have to lower the resolution of the Samsung.

I suspect that different refresh rates for two monitors are a problem.

Alternately you could add a GT630 and put each monitor on a separate graphics adapter.  Some HP systems disable onboard graphics when a discrete graphics board is added.  I looked through the specification for your system and there was no warning like I usually see.  I do not think it will be a problem adding a second graphics card.

In your post you mention that moving the monitor to the VGA port fixes the problem.   Is that not an option?