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#1 2017-04-02 14:50:17

abhijitt
Member
Registered: 2016-04-15
Posts: 6

Solarized colours on external display

I'm running KDE Plasma 5.9 and trying to connect to my HDTV.

The TV is being correctly detected by xrandr but all the colours on it are solarized (View image). There is also a slight overscan.
I was initially using xf86-video-intel but have now removed it as advised here. This is what my Xorg config looks like -

Section "Monitor"
	Identifier "Monitor0"
	Modeline "2560x1440_60.00"  312.25  2560 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync
	Option "PreferredMode" "2560x1440_60.00"
	Option "DPMS" "true"
EndSection

Section "Device"
	Identifier "Device0"
	Driver "modesetting"
	Option "DRI" "False"
EndSection

Section "Screen"
        Identifier "eDP-1"
        Monitor "Monitor0"
	Device "Device0"
	DefaultDepth 24
	Subsection "Display"
                Modes "2560x1440_60.00"
        EndSubsection
EndSection

How do I get the TV to display colours accurately?

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#2 2017-04-02 14:56:52

Trilby
Inspector Parrot
Registered: 2011-11-29
Posts: 29,447
Website

Re: Solarized colours on external display

What do you mean by "solarized".  That may be misleading in a title as it refers to a popular color scheme, but that's not what you are referring to.

What I see in your image is not aesthetically appealing (to me), but I have no idea what it is supposed to look like.  Is that a wallpaper image?  If so, do you have a link to the actual image for comparison?  In other words, what is it supposed to look like?


"UNIX is simple and coherent..." - Dennis Ritchie, "GNU's Not UNIX" -  Richard Stallman

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#3 2017-04-02 15:15:23

abhijitt
Member
Registered: 2016-04-15
Posts: 6

Re: Solarized colours on external display

Thank you for the prompt response.

Trilby wrote:

What do you mean by "solarized".  That may be misleading in a title as it refers to a popular color scheme, but that's not what you are referring to.

I do agree it may be slightly misleading, however I am unsure as to how better to describe it.

The expected image is my default KDE Plasma wallpaper that looks like this on my laptop screen.

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#4 2017-04-02 15:33:54

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,427

Re: Solarized colours on external display

Some weird choices in that Xorg.conf what does happen if you remove it and try without it? Other than that I'd go with broken cable/dying video card/dying monitor before thinking this was a software issue.

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#5 2017-04-02 16:01:21

abhijitt
Member
Registered: 2016-04-15
Posts: 6

Re: Solarized colours on external display

The "modesetting" option needs to be present when not using the Intel graphics driver. I've added the settings for the monitor resolution since my default one is too high.
Other than that I've tried playing around with the "DRI" and "AccelMethod". It once worked momentarily when I set "AccelMethod" to "SNA" but then reverted to the same state after a few minutes in the same session without any changes.
I've tried connecting to the same TV with the same laptop booted into Windows 10 and it works perfectly - so I'm positive it's not a hardware issue.

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#6 2017-04-02 19:46:36

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,427

Re: Solarized colours on external display

SNA doesn't work with modesetting and completely disabling DRI shouldn't be necessary/ is very likely to cause issues, an explicit modesetting mention isn't  necessary either because this is the last resort fallback anyway if you have uninstalled xf86-video-intel. Can we have a Xorg.log maybe there are a few mentions there.

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#7 2017-04-03 13:50:35

abhijitt
Member
Registered: 2016-04-15
Posts: 6

Re: Solarized colours on external display

Adding the two logs files from ~/.local/share/xorg/

https://pastebin.com/mL6DhPia

https://pastebin.com/r2qfL7c0

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#8 2017-04-03 14:03:54

Ropid
Member
Registered: 2015-03-09
Posts: 1,069

Re: Solarized colours on external display

Perhaps this is the kind of picture you get if the TV expects YCbCr colors but gets sent RGB colors instead?

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