You can find out where the setting is changed if you open a terminal:
gsettings list-recursively>/tmp/before
echo 'Now unity-control-center should open. Please change the scaling in "Displays" and close.'
unity-control-center
gsettings list-recursively>/tmp/after
diff /tmp/before /tmp/after |grep '[>|<]'
You find out, that these settings were changed (changing from scaling 1.0 to 2.0):
< org.gnome.desktop.interface scaling-factor uint32 1
> org.gnome.desktop.interface scaling-factor uint32 2
< com.ubuntu.user-interface scale-factor {'HDMI1': 8, 'eDP1': 8}
> com.ubuntu.user-interface scale-factor {'HDMI1': 8, 'eDP1': 16}
Or changing from 1.0 to 1.5 there is changed the text-scaling-factor
instead, because scale-factor
is integer:
< org.gnome.desktop.interface text-scaling-factor 1.0
> org.gnome.desktop.interface text-scaling-factor 1.5
< org.gnome.desktop.interface cursor-size 24
> org.gnome.desktop.interface cursor-size 36
< com.ubuntu.user-interface scale-factor {'HDMI1': 8, 'eDP1': 8}
> com.ubuntu.user-interface scale-factor {'HDMI1': 8, 'eDP1': 12}
from 1.5 to 2.0:
< org.gnome.desktop.interface scaling-factor uint32 1
> org.gnome.desktop.interface scaling-factor uint32 2
< org.gnome.desktop.interface text-scaling-factor 1.5
> org.gnome.desktop.interface text-scaling-factor 1.0
< org.gnome.desktop.interface cursor-size 36
> org.gnome.desktop.interface cursor-size 24
< com.ubuntu.user-interface scale-factor {'HDMI1': 8, 'eDP1': 12}
> com.ubuntu.user-interface scale-factor {'HDMI1': 8, 'eDP1': 16}
Those settings can be edited by hand with dconf-editor
This is very interesting in context with the about:config
variable in Firefox: devPixelsPerPx
that changes the size inside Firefox (see also: Why are all HTML form elements huge with a system-wide font-scale factor 2.0?)
Also, you can write a script to change the scale factor with these settings like /usr/local/bin/setscalefactor
:
if [ "$1" == "1" ]; then
# set scaling to x1.0
gsettings set org.gnome.desktop.interface scaling-factor 1
gsettings set com.ubuntu.user-interface scale-factor "{'HDMI1': 8, 'eDP1': 8}"
else
# set scaling to x2.0
gsettings set org.gnome.desktop.interface scaling-factor 2
gsettings set com.ubuntu.user-interface scale-factor "{'HDMI1': 8, 'eDP1': 16}"
fi
additionally:
This doesn't scale the title bars and menu, but there is also unity-tweak-tool, where you can change the overall font-scaling.
Maybe that is an alternative you could use apart from the Scaling Support in System Settings