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

[Dotan Cohen]

2010/5/21 Daniel Daboul <danieldaboul at gmail.com>:
> On Fri, May 21, 2010 at 7:15 PM, Dotan Cohen <dotancohen at gmail.com> wrote:
>>
>> 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.
>> [...]
>>
>> ✈dcl:~$ xrandr --fb 1680x2100
>> xrandr: screen cannot be larger than 1680x1680 (desired size 1680x2100)
>>
>
> From what I remember, you first have to get a large enough
> virtual display by putting something like the below example
> section into your xorg.conf and restart your X server (with
> that "Screen" active).  Only then will xrandr let you "place"
> your physical screens on the display as you like, using the --pos
> option.
>
> Section "Screen"
>  Identifier "scrv"
>  Device "intelgr"
>  Monitor "Configured Monitor"
>  SubSection "Display"
>   Virtual 2720 1680
>  EndSubSection
> EndSection
>

Current *buntu OSes complete ignore xorg.conf it seems. In 9.04 with
"Bulletproof X" the system would at least read the changes that I made
to xorg.conf, but this 9.10 version seems to ignore it completely.
Googling it seems that it is _supposed_ to use xorg.conf if the user
puts it there even in 9.10, however, lots of people report that their
changes to the file are ignored.



-- 
Dotan Cohen

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