Originally Posted by rstein
I have the computer set up to dual boot. The external display works fine in Windows and in Fedora run level 1 or 3, just not in Gnome. It's not a driver issue. What I'm really looking for is a way to tell xserver to use the external display only.
In that case: how do the special keys (like FN-F4 / FN-F5) on the keyboard interact with your display-driver and gnome? Do they have any reaction on the screen-setup?
On my system, the properiatairy-drivers for the display - with laptop screen - need the internal screen to work to start-up and if running they can switch after starting between the multiple displays on the same card. If they don't start correclty, the external display is switched off and since the internal display is not showing it keeps black.
So, what do the keys do after Gnome has started and what does the system and Gnome and the drivers do after you have (hardware) disconnected the internal screen (many laptop-screens-adapters then just use the external display since noticing the internal screen is just not connected). Of course for this disconnecting, you need some fine screwdrivers but less then to dismount the entire screen (which you can do later if you want). When I remember right, your display-cable to disconnect is on the left upper-side of the mainboard, so you just have to open that part of the case to access it.
By the way, normal hardware rules exist so turn everything well off, disconnect accu-packs, power-imputs and so on if you want to test this way.
There is probably some other tweeking on software-level possible but you might want to disconnect or remove your not-working screen anyhow don't you?
I'm wondering: does the screen give any light (in total dark) at startup or does it stay black the whole time? In that case the screen might just still work, you just need to put a light behind it to see.