Driver version: R440 U4 (441.66)
Output resolution settings as follows:
DP output 1 - 1920 x 1080 50Hz
DP output 2 - 4096 x 2160 50Hz
DP output 3 - 2560 x 1440 50Hz
DP output 4 - 2560 x 1440 50Hz
There is a visible faint slight opaque vertical line between the 2 mosaic screens.
Enclosed kindly take a look at the photos of the issues i’m facing for your kind reference:
(Uploaded to Imgur.com)
Kindly zoom in to see the details of the problem.
Thanks and cheers~