Re: VDPAU error "NNNN 60 5" and "NNNN 43 5"
I have ASUS M3A78-EM with integrated Radeon HD3200 and I'm using HDMI output.
I don't think the integrated GPU can be disabled with this MB, but you can set the primary display adapter to be the one connected to PCI-E slot.
MB's BIOS is updated to latest, but it didn't help the issue.
Edit: This also has AMD 780G Chipset. Seems quite similar setup as yours opiz.