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Get multiple screens working in 11.10 : The selected configuration for displays could not be applied

rated 0 times [ 5] [ 0] / answers: 1 / hits: 7778 / 2 Years ago, fri, february 4, 2022, 5:45:15

Seriously, sometimes I hate Ubuntu.

I try to get my secondary screen working, but when I enable it I get this error:

The selected configuration for displays could not be applied

required virtual size does not fit available size: requested=(3280, 1050), minimum=(320, 200), maximum=(1680, 1680)

And I know that this question has been asked before, but I still haven't my screen working.

The weird thing is that my secundary screen works till I log in. Before logging in it works fine. But after logging in my screen becomes black.

So I looked around for an answer and I've tried the following things.

sudo amdcccle and tried some setting according to multiple displays

replaced /etc/X11/xorg.conf

sudo aticonfig --initial

changed /etc/X11/xorg.conf and changed the 'Subsection display' part.

Only that last method works for me, but only one time. After a reboot this method didn't work out anymore.

Does someone knows an ultimate way to fix this? It really frustrates me.

Thanks in advance.

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horicgly

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1 Year ago

answered 2 Years ago olfdit · Accepted Answer

You will be pleased to hear that 12.04 will have much better support for multiscreens. Using it right now. Piece of cake.

Anyway, the error you get is probably an xrandr error complaining that your virtual display is too small.

If xrandr complains about the desktop not being large enough, put a Virtual info in your xorg.conf file, such as:

Section "Screen"

Identifier "amdcccle-Screen[1]-0"

Device     "amdcccle-Device[1]-0"

DefaultDepth     24

SubSection "Display"

    Viewport   0 0

    Virtual   3360 1920

Depth     24

EndSubSection

EndSection

Only the SubSection "Display" with the Virtual line should be added, the rest is specific for my setup.
3360 is the height, 1920 is width. Just make sure that your virtual width and height is not less than your two resolutions added together. So, simply add both widths of both screens and use that number as virtual width. Virtual height is simply the largest height of one of your two monitors. In your case, it seems to be 3280 and 1050.
amdcccle sometimes adjusts this automatically, but not always it seems.
Restart your computer for the new xorg.conf to take effect.
Good luck!