On 4/9/22 6:28 PM, George N. White III wrote:
On Sat, 9 Apr 2022 at 21:03, home user <mattisonw@xxxxxxxxxxx
<mailto:mattisonw@xxxxxxxxxxx>> wrote:
On 4/9/22 4:20 PM, Roger Heflin wrote:
> you need to look for the section that says Screen #0/#1 and the
next few
> lines will the the stuff you care about (size/dpi).
>
> On Sat, Apr 9, 2022 at 11:37 AM home user <mattisonw@xxxxxxxxxxx
<mailto:mattisonw@xxxxxxxxxxx>
> <mailto:mattisonw@xxxxxxxxxxx <mailto:mattisonw@xxxxxxxxxxx>>> wrote:
>
> On 4/9/22 10:00 AM, Roger Heflin wrote:
> > Check that both monitors are running the same resolution.
>
> How do I do that?
>
> > Also run "xdpyinfo" (rpm is xdpyinfo if you don't have it
> installed, I
> > don't know if this tool works on wayland or not) and see
if the
> listed
> > size of the screens and dpi is similar on both monitors.
I have
> seen
> > some devices that the EDID info is wrong and because of
that it
> > calculates the DPI wrong and adjusts sizes based on that
data. MIne
> > produces output like this:
> >
> > Screen #0:
> > dimensions: 3840x2160 pixels (1016x571 millimeters)
> > resolution: 96x96 dots per inch
> >
> > Mine is actually 940mm x 530mm so EDID lists my monitor as
about 8%
> > bigger than it really is
> >
> > Windows may have a monitor device table that it uses that has
> correct
> > values in it, or windows 7 may not be playing any DPI
scaling games.
>
> Yeow! I get hundreds of line of output! I don't see
anything in the
> man page for paring this down. How do I pare down the
output? The
> output looks identical regardless of which monitor I run the
command on.
Here we go:
-----
bash.1[~]: xdpyinfo | grep dimensions
dimensions: 4480x1440 pixels (1185x381 millimeters)
bash.2[~]: xdpyinfo | grep resolution
resolution: 96x96 dots per inch
I think Xorg makes one big "window" large enough to include both
monitors. 96 dpi
is the default. I've only used dual monitors on Xorg a few times, and
the monitors
were identical.
Maybe this will help:
How to get a dual monitor setup with mixed DPI working on Xorg – The
Midnight Sun (lguruprasad.in)
<https://www.lguruprasad.in/blog/2020/01/13/how-to-get-a-dual-monitor-setup-with-mixed-dpi-working-on-xorg/>
--
George N. White III
Where does the xrandr command go? Neither the web page you reference
nor the xrandr man page gives any clue.
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