Ranjan Maitra composed on 2026-07-02 11:35 (UTC-0500):
>> Simpler choices I suggest to try for mirroring the two:
>> xrandr --output eDP-1 --mode 2880x1800 --pos 0x0 --output HDMI-1 --mode
>> 3840x2160
>> --scale-from 2880x1800
>> xrandr --output eDP-1 --mode 2880x1800 --pos 0x0 --output HDMI-1 --mode
>> 3840x2160
>> --scale .75x.75
> I now can not recall about the first one, but the second and third do the
> same thing. Which likely makes sense. However, both screens are completely
> filled (how is this possible?) and what is really bad about the HDMI-1 screen
> is that it does not display new windows or the mouse cursor or even when you
> write on an existing terminal then the script gets messed up (I do not quite
> know how to explain this) to be unreadable. The eDP-1 screen looks fine to me.
> So, I am missing something.
This works here, without adjusting for the different aspect ratios:
xrandr --output DVI-D-1 --mode 1920x1200 --primary --pos 0x0 --output HDMI-1
--mode 2560x1440 --scale-from 1920x1200 --same-as HDMI-1 --pos 0x0
So, for you, without adjusting for the different aspect ratios:
xrandr --output eDP-1 --mode 2880x1800 --primary --pos 0x0 --output HDMI-1
--mode 3840x2160 --scale-from 2880x1800 --same-as HDMI-1 --pos 0x0
Or, substitute --scale .75x.75 for --scale-from 2880x1800. At least so far the
entirety of the small screen is included on the larger.
I'm getting stumped as yet trying to correct for the different aspect ratios,
but
still trying. The stumper is the bottom of the big screen is missing the bottom
of
the small screen (no panel) when I get the aspect ratio corrected. When I get
the
whole desktop on both, then the larger screen's windows are stretched
horizontally.
Perhaps Patrick is right that black bars are needed....
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based on faith, not based on science.
Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
Felix Miata
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