External monitor can only "copy" laptop's built-in

[Hetz Ben Hamo]

Which graphics chip do you have?

If you have either nVidia or ATI, both have graphics utilities (and command
line utilities) that are bundled with the drivers to setup dual/triple/quad
monitor setup.

Hetz

2010/5/21 Dotan Cohen <dotancohen at gmail.com>

> On 21 May 2010 18:10, Omer Zak <w1 at zak.co.il> wrote:
> > If you haven't done so, you need also to define a virtual screen size
> > which is big enough to include both physical displays.
> > You may want to have a look in man 1 xrandr.
> >
> > --- Omer
> >
>
> Thank you Omer, there was no indication in the KDE dialogue that was
> even necessary.
>
> Going through the manpage, it looks like I need the --fb flag.
> However, it seems to automatically calculate the size if none is
> given:
>
>       --fb widthxheight
>              Reconfigures the screen to the  specified  size.  All
>  configured
>              monitors  must fit within this size. When this option is not
> pro‐
>              vided, xrandr computes the smallest screen size  that  will
>  hold
>              the  set  of  configured  outputs;  this option provides a way
> to
>              override that behaviour.
>
> In any case, the problem might be that my video driver doesn't support
> such a large screen:
> ✈dcl:~$ xrandr --fb 3360x1050
> xrandr: screen cannot be larger than 1680x1680 (desired size 3360x1050)
> ✈dcl:~$ xrandr --fb 1680x2100
> xrandr: screen cannot be larger than 1680x1680 (desired size 1680x2100)
>
> How can I check if this is a driver issue, short of installing a
> different driver?
>
> --
> Dotan Cohen
>
> http://gibberish.co.il
> http://what-is-what.com
>
> _______________________________________________
> Linux-il mailing list
> Linux-il at cs.huji.ac.il
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>


-- 
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Skype: heunique
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