On Wed, Nov 23, 2022 at 14:01 (-0500), Felix Miata wrote:
> Jim composed on 2022-11-23 11:41 (UTC-0400):
>> Anyway, xrandr can be asked to report the EDID information for an
>> attached screen. And that can be parsed to get information such as
>> the (alleged) physical screen size (in mm). Knowing the number of
>> pixels on the screen, the DPI value can be calculated.
>> Here is a (zsh, but may work with other shells) to get the information
>> of the (first only?) attached screen:
> Instead of all that work measuring and calculating,
It's no work, I let the computer do it. :-)
> use a tool that does the work for you:
>> inxi -Gaz --vs
Neither inxi on Slackware64 15.0 nor Raspbian GNU/Linux 10 like the
--vs option. What system are you using?
> inxi 3.3.23-00 (2022-10-31)
> Graphics:
<snip>
> Each monitor's actual dimensions and DPI are accurately reported
> (from EDID, if it exists), and the entire screen's /logical/
> dimensions and DPI (what the software uses: s-dpi: 120) are also
> reported.
Thanks for that info (I'm no inxi guru). Unfortunately, inxi isn't
always so informative. For example, on an RPi 4, hooked up to a Sony
TV, I only get
$ inxi -Gaz
Graphics:
Device-1: bcm2711-vc5 driver: vc4_drm v: N/A
Device-2: bcm2711-hdmi0 driver: N/A
Device-3: bcm2711-hdmi1 driver: N/A
Display: tty server: X.Org 1.20.4 driver: modesetting unloaded: fbdev
resolution: 1920x1080~60Hz
OpenGL: renderer: V3D 4.2 v: 2.1 Mesa 19.3.2
which isn't all that informative.
Cheers.
Jim
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