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Month: December 2015

Re: [trinity-users] Configuring two monitors connected to the same computer

From: Felix Miata <mrmazda@...>
Date: Thu, 31 Dec 2015 21:59:40 -0500
deloptes composed on 2015-12-310 02:26 (UTC+0100):

> Perhaps you can help me use both displays (the built in and the external) in
> their native resolution

http://fm.no-ip.com/SS/KDE/desktopR14-3520x1200x120-jessie-intel.jpg
should show you what's possible via xorg.conf in stock Jessie and R14 on Intel.

> eDP1 connected (normal left inverted right x axis y axis)
>    1366x768      60.00 +  40.00
> DP2 connected primary 1920x1080+0+0 (normal left inverted right x axis y
> axis) 598mm x 336mm
>    1920x1080     60.00*+

For your xorg.conf, start with:
http://fm.no-ip.com/Share/Linux/xorg.conf-intel-vga1600x1200left-digi1920x1080right-120

Change monitor-VGA1 to monitor-eDP1
Change 1600x1200 to 1366x768
Change monitor-HDMI1 to monitor-DP2

Adjust DisplaySize line as desired, or comment or delete. IIRC, only one can
be applied, so when using both large and much smaller displays, some happy
medium will need to be selected to prevent one from being too teensy or the
other too gigantic.

If you want over/under instead of left/right, start instead with:
http://fm.no-ip.com/Share/Linux/xorg.conf-intel-vga1600x1200under-digi1600x1200over-120

Delete the comment lines if you care.

> but again in the stock debian jessie the xorg is not the latest version -
> I'm using kernel 4.3.3 but still not that good (you just need to see what
> is in the changelog in past kernels).

AFAICT, what you want has been functional since long before wheezy.

> You are in favor of automagic, but I never got this intel chipsets
> automagically work with two displays - no idea why - if it is working for
> you, you are among the lucky once - please share.

For some things automagic is perfect. For others, it's just not up to task.
With multiple displays, there's no way for it to guess what you want. It
needs some kind of seeding, if not fully spelled out, to go on.

> The problem I had except the one above, was (as usual) not working external
> display. Well in wheezy even the LCD was not working. After I upgraded and
> got it working with the built in, the problem was when unplug the display
> and plugin for example a beamer - X crashed etc.
> Very bad when you have to do a presentation infront of people. But good old
> D. tests all this in advance, so at least I knew what I should fix.

Again, there's nothing I can do specific to laptops or docking stations. I
have lots of hardware to test with, but all "desktops".
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/