I just got a new graphics card and when I boot up it will only use the card to display the boot screen although once it boots it only uses the integrated graphics. The open source driver works fine but the proprietary one (which I need for Steam) does not. I took a video of what happens.
So if you have the Open source driver on and not the Proprietary, the Machine will boot up from the AMD card or do you still need to plug in the Integrated graphics one?
In any case, see if you can disable the integrated graphics from your BIOS. You should not be able to use you integrated graphics card if the OS was to see the AMD card correctly. So it might be a BIOS mix up.
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Why do you need the proprietary drivers for steam?
That worked! Thank you so much, I've tried so many different things
Glad to be of service...
Cheers!
Crazy Ubuntu weirdness again. adding nomodeset to the kernel boot line would have likely also worked for future reference.
I am not sure its an Ubuntu thing. This kind of mix ups with what the BIOS does and what is and is not disabled is common.
I had something similar with the Audio for example in Debian. My integrated Audio was on Auto in BIOS by default. When I added an Nvidia Card with an HDMI port the BIOS just disabled the on-board audio automatically the moment it saw a graphics card with HDMI. Thus when I booted I had no sound and the on-board audio could not be seen anywhere.
I had to have the on-board audio always enabled (instead of auto) for the BIOS to allow it work alongside the HDMI port. And that was pretty much independent of the OS. This might have been sth similar.