Output of xrandr shows 1024x768+1366+0; what does it mean and can I change it?

Solution 1:

As Muru mentions, the 1366 is the horizontal offset of your screen.

How to read the output of xrandr

An example:

Imagine your two screens, placed together into a frame. Together, they will make a virtual screen as you can see above. In the output of xrandr, the left screen shows: 1680x1050+0+347. The last two figures; +0+347 show the x and y distance (px) of the upper left corner of the screen, to the upper left corner of the virtual frame they are in.

The right screen shows 1280x1024+1680+0. The +1680+0 shows similar information, as you can see in the image

Can You change these values?

Within boundaries, yes. An example to make both screens top-alligned:

xrandr --output DVI-I-1 --pos 0x0

Where DVI-I-1 is my left screen

This will create the situation as below:

More on the options of xrandr here.