toggle laptop for LCD projector

[theory_prof]

I have a Dell Inspiron 1150; it' dual boot, and works just fine mostly.

I am trying to use an LCD projector with the laoptop compuuer.
When I am under Windows I can toggle with Fn8 between, computer screen,
projector, and {computer screen + projector}. Under Linux the last
option {computer screen + projector} does not occur.

Any advice how to make this happen, and what the issues are?

[PatrickJ]

I have a similar problem with my VAIO, the fn- keys don't work under linux at all. I've found that I can plug in an external monitor in windows, switch it on, reboot into linux and it stays on though. Not a good solution but if you really want to use it in Linux, it might work.

[Clunixchit]

ive searched for some threads in the forum concerning this topic
>>> search >>> projector
till now havent got any solution !!!!

[jdeslip]

I have same problem in fedora 6 - fn-f8 does nothing. Anyone know a solution?

[oburlaca]

I have a nx7010 laptop, the same problem

[A.Serbinski]

If you have an NVIDIA GPU, then with the closed source nvidia drivers, you can use nvidia-settings to add and remove monitors on-the-fly. I assume that ATI drivers also have something like this, but I don't use them, so I can't confirm. I know that the open source ATI drivers USED to automatically activate the second output in CLONE mode, but this got broken somewhere along the line.

[oburlaca]

I've solved my problem :) Here is the Device section in my /etc/X11/xorg.conf:

Section "Device"
Identifier "Videocard0"
Driver "radeon"
Option "VideoOverlay" "on"
Option "MonitorLayout" "LVDS, CRT"
Option "MergedFB" "true"
Option "BIOSHotkeys" "on"
Option "MetaModes" "1680x1050-1280x1024"

EndSection


The most important is
Option "MonitorLayout" "LVDS, CRT"