unset Xft.dpi how?

[Hacksign]

If your distribution still use Xorg, then config it via 
/etc/X11/xorg.conf or any equal config file.
The keyword is DisplaySize this keyword should be supported by all video 
card drivers.

Section "Monitor"
     Identifier "Monitor0"
     DisplaySize 541 304
     Option        "DPMS"
     Option      "Primary" "true"
EndSection

DisplaySize caculate method:

*displaysize = (< pixelsize >/<DPI-Desired>)*25.4*


replace <pixelsize> to your vertical resolution and horizon resolution.
and <DPI-Desired> by your wanted dpi size.


On 10/12/2015 09:05 AM, Felix Miata wrote:
> Thomas Lübking composed on 2015-10-11 20:32 (UTC+0200):
>
>> Felix Miata wrote:
>>>> Remove (you need to reload the entire database) xrdb -query | grep -v
>>>> Xft.dpi | xrdb -load
>>>> This reads out the current database, strips every line containing
>>>> "Xft.dpi" and loads the result as new database.
>>> This looks like should be what I'm after, but putting it above '.
>>> /etc/X11/Xsession' in Mint 17.2's /etc/X11/xinit/xinitrc effect on
>>> cinnamon-session. Using the following ~/.xinitrc d
>> Did you check whether those files are invoked at all by cinnamon?
> I have no idea how to find out.
>
>> xinitrc is related to xinit which is used by startx, but desktops tend to
>> operate on their own stuff (eg. startkde doesn't read ~/.xinitrc at all,
>> you would have to explicitly add it to its autostart stuff.
>> I know nothing about cinnamon nor Mint, sorry, but if cinnamon-session is
>> (typically) a script, you might find its inclusions there (otherwise best
>> ask cinnamon developers) You could also start a bare X server, xterm and
>> "strace cinnamon-session 2>&1 | grep open" to see what files it opens (iff
>> cinnamon-session is an ELF binary!)
> I tried this ~/.xinitrc first at a test:
>
> Then I tried:
>
> #!/usr/bin/env bash
> #xrdb -query | grep -v Xft.dpi | xrdb -load &
> export LANG="en_US.UTF-8"
> export LC_ALL="en_US.UTF-8"
> export LANGUAGE="en_US.UTF-8"
> export LC_CTYPE="en_US.UTF-8"
> echo "Xft.dpi: 120" | xrdb -override
> exec /usr/bin/xterm &
> exec openbox
> #exec cinnamon-session
>
> That got an xterm open, from which I entered xrdb -query | grep Xft to find
> 120, then strace cinnamon-session 2>&1 | grep open. Screen went black, then I
> was returned to shell prompt from which I ran startx. So next I tried this
> ~/.xinitrc:
>
> #!/usr/bin/env bash
> #xrdb -query | grep -v Xft.dpi | xrdb -load &
> export LANG="en_US.UTF-8"
> export LC_ALL="en_US.UTF-8"
> export LANGUAGE="en_US.UTF-8"
> export LC_CTYPE="en_US.UTF-8"
> echo "Xft.dpi: 120" | xrdb -override
> exec /usr/bin/xterm &
> #exec openbox
> exec strace cinnamon-session 2>&1 | grep open
>
> That got both xterm and cinnamon session going, but left no output anywhere I
> could see or find, including not touching .xsession-errors. lsof|wc -l
> produces 12363. Whether I should be able to find a clue in lsof output I have
> no idea, so maybe it's time to find cinnamon people to ask how it's supposed
> to work.
>
>>> xrdb -query | grep -v Xft.dpi | xrdb -load &
>>> export LANG="en_US.UTF-8"
>>> export LC_ALL="en_US.UTF-8"
>>> export LANGUAGE="en_US.UTF-8"
>>> export LC_CTYPE="en_US.UTF-8"
>>> exec cinnamon-session
>> I bet that cinnamon-session ultimately re-sets the xrdb (as does KDE on
>> starting up)
> That would surprise me none.
>
> Again, thank you!

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