On 03/01/16 23:59, root wrote:
I have recently become aware (bothered by) what appears to be
a line moving up across the TV screen. The TV is a Samsung
4K with HDMI input, and the line that moves up the screen
appears to be a missing scan line.

The TV derives its input from a linux computer running
mplayer, and the video card is an NVidia 610. The
HDMI output goes to the TV and the vga output goes to
a monitor which I can see while the TV is playing.

The discontinuity on the TV screen is not replicated
on the monitor screen.

The moving line appears every few minutes.

I was not conscious of the problem prior to a shutdown
of the video server to increase the storage capacity.

Any suggestion of what might cause the effect, or questions
that may further clarify the phenomenon would be appreciated.


Two tests.

Try HDMI from another source. If same fault here, blame Samsung and call
their support. Or maybe cabling interference issues.

Or temporarily try another OS on your hardware. A linux live CD would do.

If it doesn't occur on the other OS, then grab the video timing info
from that, and compare with your current OS.

xvidtune -show

--
Adrian C