I have a desktop computer with a Radeon R7 360 and FOS-drivers. My main display, which I am using always, is connected to the DVI-port and my TV is connected to the HDMI-out, in case I want to put any videos or films on or just need an extra display.
However, when I turn my TV on and it is recognised by Ubuntu, the additional space is always added to the wrong side. I usually choose to "expand the desktop to the right side", but what actually happens is my main desktop is then displayed on the TV and my regular monitor is "added" to its space. I then always have to go into the settings and drag the displays in correct order, this setup is also not saved, since I have to redo this procedure every time I turn on my TV to expand my desktop.
Is there any solution for this or does someone have an idea on where to set up a fixed configuration for my two displays?
I am currently using Ubuntu Studio 15.10 with Xfce.
Edit: This is the output of xrandr:
Screen 0: minimum 320 x 200, current 4480 x 1080, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 1920x1080+2560+0 (normal left inverted right x axis y axis) 160mm x 90mm
1920x1080 60.00*+ 50.00 59.94 30.00 25.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1280x1024 60.02
1360x768 60.02
1152x864 59.97
1280x720 60.00 50.00 59.94
1024x768 60.00
800x600 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
640x480 60.00 59.94
720x400 70.08
DVI-0 connected primary 2560x1080+0+0 (normal left inverted right x axis y axis) 673mm x 284mm
2560x1080 60.00*+
1920x1080 60.00
1680x1050 59.88
1280x1024 75.02 60.02
1280x800 59.91
1152x864 75.00
1024x768 75.08 60.00
800x600 75.00 60.32
640x480 75.00 60.00
720x400 70.08
xrandr
somewhere if your setup is correct? It is a bug, bug still can be fixed with a workaround.