Solution is to disable it, set the monitor positions as needed, and reboot instead of logof. Logof somehow resets the configuration.I also tried these but they have disadvantages:
xrandr „xrandr –output DVI-1 –right-of DVI-0 : only until reboot. Needs script to be written and executed again and again.
arandr : the same as xrandr, writes the script for you, but it did not write the „right-of“ for me.
xorg.conf : not suggested to be used, but I haven’t tested it yet. https://wiki.archlinux.org/index.php/multihead#Configuration_using_xorg.conf
tags:ubuntu,linux,two,display,monitor,dualhead,multihead
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It is not working very well, sometimes after reboot or update of system packages these graphic settings reset.
Key win + p shows multi-monitor settings but it is hard to modify them. Editing monitor settings also sometimes does not disable mirroring of monitors. Sometimes disabling one display disables them both. But still it is a best shot to disable one display, then disable mirroring, then enable other display.
All settings are stored in to ~/.config/xfce4/xfconf/xfce-perchannel-xml/displays.xml . Delete the file if displays show nothing. This is my valid multi-monitor displays.xml:
<?xml version=“1.0″ encoding=“UTF-8″?>
<channel name=“displays“ version=“1.0″>
<property name=“Default“ type=“empty“>
<property name=“DVI-0″ type=“string“ value=“1. Rogen Tech Distribution Inc 17"“>
<property name=“Active“ type=“bool“ value=“true“/>
<property name=“Resolution“ type=“string“ value=“1280×1024″/>
<property name=“RefreshRate“ type=“double“ value=“60.019740″/>
<property name=“Rotation“ type=“int“ value=“0″/>
<property name=“Reflection“ type=“string“ value=“0″/>
<property name=“Primary“ type=“bool“ value=“true“/>
<property name=“Position“ type=“empty“>
<property name=“X“ type=“int“ value=“0″/>
<property name=“Y“ type=“int“ value=“0″/>
</property>
</property>
<property name=“DVI-1″ type=“string“ value=“Digitálny displej“>
<property name=“Active“ type=“bool“ value=“true“/>
<property name=“Resolution“ type=“string“ value=“1024×768″/>
<property name=“RefreshRate“ type=“double“ value=“60.003840″/>
<property name=“Rotation“ type=“int“ value=“0″/>
<property name=“Reflection“ type=“string“ value=“0″/>
<property name=“Primary“ type=“bool“ value=“false“/>
<property name=“Position“ type=“empty“>
<property name=“X“ type=“int“ value=“1280″/>
<property name=“Y“ type=“int“ value=“77″/>
</property>
</property>
</property>
</channel>