1 Dec
2016
1 Dec
'16
7:50 a.m.
Felix Miata wrote:
debian (of course)
Of course you can not change the DPI of already running programs, because
they have already got the DPI value when starting.
You are misunderstanding the display term (I think). Display is not your
monitor. It is a virtual entity.
deloptes composed on 2016-12-01 01:17 (UTC+0100):
The thing is we don't know and above this the "why" is not clear :)
Felix Miata wrote:
> deloptes composed on 2016-11-30 07:30
(UTC+0100):
>> Felix Miata wrote:
>>> xserver
>> In your example I don't see how you
are passing the display number to
>> xserver command
> I've not been, and adding it doesn't
change anything. I'm not trying to
> start a server. I'm trying to alter the already running server from
> within the running server. The commands are all run on screen :0 in the
> instant case. Why does the first instance work as expected (as it has
> since it was KDE3 and probably KDE2 before) without specifying a screen?
I was thinking you want to run xserver on
different port/screen
That I know how to do when it's what I want to do. :-)
>>
All of the X servers accept the command line options
>> described
>> below. Some X servers may have alternative ways of providing the
>> parameters
>> described here, but the values provided via the command line
>> options
>> should override values specified via other mechanisms.
>> :displaynumber
>> The X server runs as the given displaynumber, which by
>> default is 0. If multiple X servers are to run simultaneously on a
>> host, each
>> must have a unique display number. See the DISPLAY
>> NAMES
>> section of the X(7) manual page to learn how to specify which display
>> number
>> clients should try to use.
> # man X(7)
> bash: syntax error near unexpected token '('.
> # man X
> no manual entry for X
Strange I have man for Xorg and for X - perhaps
you are missing
something.
'man Xorg' works here.
I think you are trying to teach me how to do what I already know how to
do, which has nothing to do with the purpose of the exercise.
And I have full featured man page for tdecmshell
On openSUSE, or on a Debian? (sidetracking....) > # tdecmshell --help-all only shows a
displayname option, no
> # displaynumber tdecmshell --help-all
> Usage: kcmshell [Qt-options] [KDE-options] [options] module...
> Says nothing about server options.
Qt options:
--display <displayname>
Use the X-server display 'displayname'
> What is shown in
http://fm.no-ip.com/SS/dpi108vs133.jpg is all from a
> single running instance of starttde, not some cut and paste hocus pocus.
> ???
What you show on the image means you change the
DPI on display :0
(default) and it will impact all programs run there.
Not exactly. Correct WRT :0. It has no effect on any program already open
on :0, which is one half of the point of the exercise. The xrandr DPI
change only affects programs opened after running it. I want before and
after screenshots, purely for the purpose of showing someone what does and
does not change as a result of a DPI configuration change. I succeeded in
the bulk of reaching my goal, but inelegantly by using xterms instead of
before and after tdecmshells I was expecting to be able to utilize. With
tdecmshell I was expecting its own UI to demonstrate non-text effects on
UI sizing, but most important was the text impact.
I haven't
spent too much time with X, but also not too less. AFAIR it was
1.GPU -> 1.Screen -> 1..n Display(s)
In general I do not understand what you want to
achieve
Clearly. :-)
- you can not run a
Xserver from within Xserver and let it bind to
the same screen port which
is already taken by the first Xserver running. In my opinion you can run
xserver on :1 or :2 from the native console (but it would require more
work to run applications there ... see session management)
man xserver
...
-dpi resolution
sets the resolution for all screens, in dots per inch.
To
be used when the server cannot determine the screen size(s) from the
hard‐
ware.
At least AFAIR this is what vnc is doing, where
(AFAIR) you specify the
port example :5 and then can connect from remote to xserver on :5 remote
via vnc.
I've been using multiple "screens" on the same display (:0, :1 and/or :2
running "simultaneously") forcing resolutions and DPIs for roughly a
decade (mostly on test installations, rarely on my 24/7 systems). I only
do it one of two ways though, never according to the man excerpt above,
and never (except very occasionally very temporarily) via a dpi setting
squirreled away in some DE's config file, and very very rarely using
Xft.dpi (see: [2]). Either I run xrandr in a startup script[1], or via
DisplaySize and/or PreferredMode in /etc/X11/xorg.conf*.
[1] http://fm.no-ip.com/Share/Linux/setup (with a
single # removed
[according to
result desired)
[2] https://bugzilla.mozilla.org/show_bug.cgi?id=1269274
https://bugs.freedesktop.org/show_bug.cgi?id=98909
I will have to look into the links later, but from what I know it is not
possible to set DPI per application on the same screen/server. It could be
that you can change the font size (what we actually already have), but this
is a different story.
regards
PS: and I am not teaching, I am just sharing my knowledge and learning
something in the same time.