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Re: HP Elitebook with external display and color issue

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On Du, 12 sep 21, 02:58:13, deloptes wrote:
> Hi,
> I don't know how to explain my problem, but I try hoping that someone would
> understand and help me fix it.
> 
> So I have one HP Elitebook (I think it is 820 G2) with 16GB RAM and Intel(R)
> Core(TM) i5-7200U CPU @ 2.50GHz.
> 
> The issue is that when it starts with its own display the colors are OK, but
> as soon as I activate an additional display the colors get messed and it is
> looking ugly like described
> https://h30434.www3.hp.com/t5/Notebook-Video-Display-and-Touch/820-g1-Ubuntu-Screen-artifacts/m-p/7029819/highlight/true#M188601)

Hardware
--------

That link mentions using a D-SUB (you didn't specify what you are using, 
please do so), in which case take particular care to ensure it is 
properly inserted, at *both* ends.

Even so, you should try using HDMI/DVI/DisplayPort instead (whichever is 
available).

If the cable is (very) long try using a shorter, known good one, 
regardless of type.

If you are using any kind adapters try connecting directly with the 
correct cable instead.

Is there any difference if the laptop is connected to AC (or not)?


Software
--------

What Debian release is this (and kernel version if not default)? Try a 
newer kernel, e.g. from -backports.

What driver is in use, device specific or modesetting? Try the other one 
instead (or the proprietary one, if applicable).

Your Xorg.0.log would be useful to get more information about your 
hardware and software, and/or check for possible issues.

Kind regards,
Andrei
-- 
http://wiki.debian.org/FAQsFromDebianUser

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Thread

HP Elitebook with external display and color issue deloptes <emanoil.kotsev@deloptes.org> - 2021-09-12 03:00 +0200
  Re: HP Elitebook with external display and color issue Andrei POPESCU <andreimpopescu@gmail.com> - 2021-09-12 12:50 +0200
    Re: HP Elitebook with external display and color issue deloptes <emanoil.kotsev@deloptes.org> - 2021-09-12 13:30 +0200
      Re: HP Elitebook with external display and color issue [SOLVED] deloptes <emanoil.kotsev@deloptes.org> - 2021-09-12 13:40 +0200

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