Disable integrated graphics before new card install
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Distribution: Servers: Scientific Linux 5.x // Desktops: Fedora Core (latest)
I agree with the above poster...
The reason the manufacturer is telling you to disable integrated graphics is that they want their card to be the initial display device. Rather than simply telling you that, they tell you to disable everything else.
I suppose it is a 'dumbed down' way of telling you what actually is important.
Some graphics cards - actually I think most - will not display correctly if they are initialized after system post. Therefore, if your 'new' card is not the initial display device, then it may not display properly or at all if not initialized at post. I have seen a few rigs that use mutiple display devices, however that is a topic for another post... in short... what you have to do it go into your bios, disable onboard / integrated video, and set 'display first' or 'initial display' or 'primary display' (or whatever your bios calls it) to PCI (E or X or whatever it is).