radeon hd 7770 1gb gddr5 with ubuntu 13.04 problems

macintyre

Honorable
Jul 18, 2013
27
0
10,540
Hi, i just purchased a radeon hd 7770 1gb gddr5 gpu and threw it in my computer build:
-i5-4670k
-gigabyte z87x ud3h
-corsair tx750m

these components probably won't matter but if you're interested here is the rest of the build:
-corsair carbide 300r
-corsair h80i
-corsair vengeance 4gb
-some bitfenix led fans

Anyway so the problem is that when i go to start my computer (connected to my gpu) it displays the mobo name and options with correspoding function keys, but when ubuntu starts loading nothing is displayed on the screen. but if i connect my monitor to the integrated graphics, even with the gpu running, everything is displayed normally. It's like ubuntu wants to use the integrated graphics over the gpu.

Please give me a hand here :)