====== X Window system ======
based on XFCE

==== Font smoothing ====
  * Settings -> Appearance -->  (it works only for XFCE desktop)

<file xml | ~/.fonts.conf>
<?xml version="1.0" ?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
<!--
    <match target="font">
	<edit name="autohint" mode="assign"><bool>true</bool></edit>
    </match>
-->
 <!--
            use rgb sub-pixel ordering to improve glyph appearance on
            LCD screens.  Changes affecting rendering, but not matching
            should always use target="font".
   -->
       <match target="font">
            <edit name="rgba" mode="assign"><const>rgb</const></edit>
            <edit name="hintstyle" mode="assign"><const>hintfull</const></edit>
       </match>
</fontconfig>

</file>

  * Chrom browser. Go to [[chrome://flags]] and find ''LCD text antialiasing''
  * Firefox. Go to [[about:config]] and find ''gfx.use_text_smoothing_setting''
  * 
==== Focus stealing ====
  * Settings -> Window Manager -> Focus
  * Settings -> Window Manager Tweaks -> Focus

==== set default window manager ====
<code bash>
update-alternatives --config x-session-manager
# /usr/bin/startxfce4
update-alternatives --config x-window-manager
# /usr/bin/xfwm4
update-alternatives --config x-terminal-emulator
# /usr/bin/xfce4-terminal.wrapper
</code>

=== Enable CTRL+ALT+DEL to kill X-server ===
<code bash>dpkg-reconfigure keyboard-configuration</code>


=== XFCE4: restore working TAB key and CTRL+D ===
<file | ~/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-keyboard-shortcuts.xml>
<property name="&lt;Super&gt;Tab" type="string" value="empty"/>

</file>

=== misc ===
<code bash>apt-get install browser-plugin-vlc</code>


=== Power management ===
<code bash>sudo apt-get install acpi-support</code>

Turn off monitors command and lock:
<code bash>
xset dpms force off
xscreensaver-command --lock
</code>

=== Control minitor brightness ===
<code bash>
xrandr --output HDMI2 --brightness 0.5
xrandr --output VGA1 --brightness 0.5
</code>

=== Enable/disable 2nd monitor ===
<code bash>
xrandr --output HDMI2 --off
xrandr --output HDMI2 --auto --right-of VGA1
</code>
==== Using Brighntess Controller ====
<code bash>sudo apt-get install python-wxgtk3.0 python-pyside</code>

Download and install latest version from [[http://lordamit.github.io/Brightness]].
Do not use Ubuntu's deb because it contain old version.


==== Using Indicator Brightness ====

<code bash>
apt-get install libappindicator1 libdbusmenu-gtk4 libindicator7 python-appindicator python-gobject
apt-get install notify-osd

wget http://launchpadlibrarian.net/196377180/notify-osd-icons_0.8%2B15.04.20150202-0ubuntu1_all.deb
dpkg -i dpkg -i notify-osd-icons_0.8+15.04.20150202-0ubuntu1_all.deb

wget http://ppa.launchpad.net/indicator-brightness/ppa/ubuntu/pool/main/i/indicator-brightness/indicator-brightness_0.4~bzr11~ubuntu15.04.1_all.deb
dpkg -i indicator-brightness_0.4~bzr11~ubuntu15.04.1_all.deb


sudo apt-get install software-properties-common python-software-properties
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt-get update
sudo apt-get install indicator-brightness
</code>


=== Open PDFs in okular ===
Force system to ask how to open file:
<code bash>mimeopen -d file.pdf</code>
or
<code bash>
xdg-mime query filetype document.pdf
xdg-mime query default application/pdf
xdg-mime default okularApplication_pdf.desktop application/pdf 
# or kde4-okularApplication_pdf.desktop
</code>
see
<code bash>
cat /usr/share/applications/mimeinfo.cache and defaults.list 
cat  ~/.local/share/applications/mimeapps.list 
</code>

sudo update-mime-database /usr/share/mime

=== Multimonitor ===
use xrandr to list available outputs. Example output:

<code>
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
VGA1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 410mm x 230mm
   1366x768      59.79*+
...
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080     60.00*+
...
DP1 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
</code>

To set layout of monitor:
<code bash>
xrandr --output VGA1 --right-of HDMI2
</code>

You need to create startup script with above command, and configure XFCE to run it at start (read more below).

There is also graphical UI available:
<code bash>apt-get install arandr</code>

To make settings permanent, use **Layout** --> **Save as**
This will create executable script in **~/.screenlayout/your_name.sh**

Then add above executable script to autostart of XFCE:
**Application Menu** --> **Settings** --> **Session and Startup**

=== remote VNC access ===
Start VNC after first user login (from autostart):

<code bash>
$ sudo apt-get install x11vnc
$ mkdir -p ~/.config/autostart
$ cd ~/.config/autostart
$ cat > X11VNC.desktop
</code>

And paste following content:

<code ini>
[Desktop Entry]
Encoding=UTF-8
Type=Application
Name=X11VNC
Comment=
Exec=x11vnc -forever -usepw -httpport 5900
StartupNotify=false
Terminal=false
Hidden=false
</code>

Finish pasting with CTRL+D

Password file (~/.vnc/passwd) you can create using //vncpasswd// command.

==== vnc4server ====

in file ~/.vnc/xstartup

add before executing x-session:

<file bash ~/.vnc/xstartup>
if test -z "$DBUS_SESSION_BUS_ADDRESS" ; then
	eval `dbus-launch --sh-syntax –exit-with-session`
	echo "D-BUS per-session daemon address is: \
	$DBUS_SESSION_BUS_ADDRESS"
fi
</file>

Update:
It looks like now vncserver expects that ''xstartup'' to stay foreground, so simply:
<file bash ~/.vnc/xstartup>
xsession &
dbus-launch --exit-with-session lxsession
</file>

=== Sound ===
<code>
apt-get install pavucontrol pavumeter
</code>

=== Trackball/mouse ===
<code bash>apt-get install xinput</code>
For touchscreen, please install also xinput-calibrator

<code bash>
xinput list # to see device list and ids
xinput list-props 10 # list props for device id=10
</code>