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Re: on-screen artifacts (red pixels) at high resolution with Intel HD 630 (Kaby Lake)

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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.

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on-screen artifacts (red pixels) at high resolution with Intel HD 630  (Kaby Lake) Alexandre Rossi <alexandre.rossi@gmail.com> - 2017-12-07 12:40 +0100
  Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) "Alexander V. Makartsev" <avbetev@gmail.com> - 2017-12-07 13:30 +0100
    Re: on-screen artifacts (red pixels) at high resolution with Intel  HD 630 (Kaby Lake) Shin Ice <shin.ice@shinice.net> - 2017-12-07 14:20 +0100
    Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Alexandre Rossi <alexandre.rossi@gmail.com> - 2017-12-08 13:40 +0100
      Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) "Alexander V. Makartsev" <avbetev@gmail.com> - 2017-12-08 16:00 +0100
        Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Alexandre Rossi <alexandre.rossi@gmail.com> - 2017-12-09 15:40 +0100
          Re: on-screen artifacts (red pixels) at high resolution with Intel  HD 630 (Kaby Lake) David Wright <deblis@lionunicorn.co.uk> - 2017-12-09 16:20 +0100
  Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Benny Simonsen <benny@slbs.dk> - 2017-12-09 17:00 +0100
    Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Alexandre Rossi <alexandre.rossi@gmail.com> - 2017-12-10 11:20 +0100
  Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Jörg-Volker Peetz <jvpeetz@web.de> - 2017-12-10 12:30 +0100
    Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Alexandre Rossi <alexandre.rossi@gmail.com> - 2017-12-11 10:10 +0100
      Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Jörg-Volker Peetz <jvpeetz@web.de> - 2017-12-11 12:20 +0100
        Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Alexandre Rossi <alexandre.rossi@gmail.com> - 2017-12-14 23:00 +0100
          Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Ben Caradoc-Davies <ben@transient.nz> - 2017-12-14 23:50 +0100
            Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Alexandre Rossi <alexandre.rossi@gmail.com> - 2017-12-19 08:30 +0100
          Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Felix Miata <mrmazda@earthlink.net> - 2017-12-15 00:30 +0100
            Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Alexandre Rossi <alexandre.rossi@gmail.com> - 2017-12-21 23:10 +0100
              Re: on-screen artifacts (red pixels) at high resolution with Intel HD  630 (Kaby Lake) Felix Miata <mrmazda@earthlink.net> - 2017-12-22 00:10 +0100

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