Xfce4

Desktop configuration

Enable 2 monitors:''' Edit/Create "~/.xprofile":
xrandr —output DVI-0 —auto —primary —output VGA-0 —auto —left-of DVI-0

if the error "xrandr: screen cannot be larger than 1280x1280 (desired size 2560x1204)" do:
$ su root
$ service gdm3 stop
$ Xorg -configure <— this creates "xorg.conf.new" root-homedirectory (its the system config directory /usr/share/X11/xorg.conf.d)
$ cp xorg.conf.nwe /etc/X11/xorg.conf
$ nano /etc/X11/xorg.conf:
Section "Screen"
Identifier "Screen0"
Device "Card0"

SubSection "Display"
Viewport 0 0
Depth 24
Virtual 2560 1024 <— add this line
EndSubSection
EndSection
$ service gdm3 start

Black desktop background and white icon-labels: Edit/Create "~/.gtkrc-2.0":
style "xfdesktop-icon-view" {
XfdesktopIconView::label-alpha = 0
base[NORMAL] = "#3F6BA4"
base[SELECTED] = "#3F6BA4"
base[ACTIVE] = "#3F6BA4"
fg[NORMAL] = "#ffffff"
fg[SELECTED] = "#ffffff"
fg[ACTIVE] = "#ffffff"
}
widget_class "*XfdesktopIconView*" style "xfdesktop-icon-view"

Execute ~/.xprofile after XFCE startup
The ~/.xprofile is executed very early after the X11 initialization. After XFCE startup, the X11 settings are overwritten again.
To reapply the settings, the autostart commands of XFCE have to be edited to execute the ~/.xprofile:
Anwendungsmen├╝ —> Einstellungen —> Sitzungs-und Startverhalten —> Automatisch gestartete Anwendungen —> Hinzuf├╝gen von ~/.xprofile

Missing Menu-Panel and only one Desktop available
Remove the folder "./cache/sessions" in your home-directory and restart.

**Enabling doubleclicks on touchpad **
sudo gedit /usr/share/X11/xorg.conf.d/50-synaptics.conf
Section "InputClass"
Identifier "touchpad catchall"
Driver "synaptics"
MatchIsTouchpad "on"
Option "TapButton1" "1"
Option "VertEdgeScroll" "1"
EndSection

Tracker and Tracker-Miner-fs
those programs are eating up a lot of CPU power.
It can be configured by using "Applications—> Settings —> Search and Indexing"
Just disable all checkmarks !

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