On Sat 09 Dec 2017 at 15:35:18 (+0100), Alexandre Rossi wrote: > > Screenshot [1] looks normal to me, but on screenphoto [2] I clearly see > > red-ish stripes and pink spots in the middle. > > > > Now it looks like your LCD could be faulty not PC hardware\software. Can you > > test it with another LCD monitor, or connect it to TV via HDMI cable if it's > > possible? > > The same TV and cable work fine at the same resolution with another PC > and another laptop. > The same TV, cable and same computer work fine if using Windows 10. > > So the problem only happens with that PC _AND_ Linux/Xorg.
I'm no expert here, but I'd suspect the driver. I'd also be looking systematically at gradations of known colours (perhaps start with a colour wheel) to try and tie down where the errors occur, and whether they're related to bit values, rollovers (like 0FFF→1000), screen position, etc. Cheers, David.