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I have total of four monitors. One (1680x1050) is connected to integrated Intel display adapter, and three (1440x900 and two 1920x1080) are connected to dedicated ATI display adapter. With certain XRandR configurations some monitors have their display area cropped, so that for example lower part of the screen is not usable.

I'd like to use configuration like this one:

xrandr \
    --output VGA-1 --mode 1440x900 --pos 780x1080 --rotate left \
    --output HDMI2 --mode 1680x1050 --pos 0x30 --rotate normal \
    --output HDMI-3 --mode 1920x1080 --pos 1680x1080 --rotate normal \
    --output DVI-0 --mode 1920x1080 --pos 1680x0 --rotate normal

But the lower part (below the bottom edge of the bottom right screen) of the bottom left screen is cut off:

Failure

On the other hand, this configuration works:

xrandr \
    --output VGA-1 --mode 1440x900 --pos 780x1050 --rotate left \
    --output HDMI2 --mode 1680x1050 --pos 0x0 --rotate normal \
    --output HDMI-3 --mode 1920x1080 --pos 1680x1080 --rotate normal \
    --output DVI-0 --mode 1920x1080 --pos 1680x0 --rotate normal 

, as shown here:

Success 1

Also this configuration works:

xrandr \
    --output VGA-1 --mode 1440x900 --pos 780x0 --rotate left \
    --output HDMI2 --mode 1680x1050 --pos 0x1440 --rotate normal \
    --output HDMI-3 --mode 1920x1080 --pos 1680x1440 --rotate normal \
    --output DVI-0 --mode 1920x1080 --pos 1680x360 --rotate normal 

, as shown here:

Success 2

In addition, the configuration below works

xrandr \
    --output VGA-1 --mode 1440x900 --pos 780x1080 --rotate left \
    --output HDMI2 --mode 1680x1050 --pos 0x30 --rotate normal \
    --output HDMI-3 --mode 1920x1080 --pos 1680x1440 --rotate normal \
    --output DVI-0 --mode 1920x1080 --pos 1680x0 --rotate normal

as shown here:

Success 3

UPDATE:

Strangely, I managed to get the wanted layout by command sequence:

xrandr \
    --output VGA-1 --mode 1440x900 --pos 780x1080 --rotate left \
    --output HDMI2 --mode 1680x1050 --pos 0x30 --rotate normal \
    --output HDMI-3 --mode 1920x1080 --pos 1680x1440 --rotate normal \
    --output DVI-0 --mode 1920x1080 --pos 1680x0 --rotate normal

xrandr \
    --output HDMI2 --mode 1680x1050 --pos 0x30 --rotate normal \
    --output DVI-0 --mode 1920x1080 --pos 1680x0 --rotate normal \
    --output VGA-1 --mode 1440x900 --pos 780x1080 --rotate left \
    --output HDMI-3 --mode 1920x1080 --pos 1680x1080 --rotate normal \
        --primary

so that it works on freshly started Xorg instance, but I don't have a clue why it works. Besides, that solution seems a bit ugly. Can anybody enlighten me on this issue, please?

My OS is Arch Linux, window manager is i3, and the version of XRandR is 1.4.2. Xorg configuration files have only InputClass and Files sections.

  • 1
    I'm starting to believe that this is a hardware or firmware issue. – montiainen Jun 3 '14 at 12:36

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