Comment # 54 on bug 60879 from Michel Dänzer

(In reply to comment #53)
> What is the PCI ID of your GPU?

>From attachment 74859 [details]:

> [drm] initializing kernel modesetting (TAHITI 0x1002:0x679E 0x174B:0xE246).

So the PCI ID is 0x679E, a harvested Tahiti I think.