https://bugs.freedesktop.org/show_bug.cgi?id=91202
--- Comment #9 from Vedran Miletić rivanvx@gmail.com --- EoD did testing on Sapphire R9 380X Nitro, details at https://gist.github.com/EoD/2baa78b81e233218a59c and copied below:
Booted with DVI-D-0 + HDMI-A-0 Both displays work
Booted with DVI-I-1 + HDMI-A-0 Both displays work
Booted with DVI-D-0 + DVI-I-1 DVI-D-0 shows output, DVI-I-1 stays blank (via xrandr)
Booted with DVI-I-1 + plugging in DVI-D-0 after boot DVI-I-1 shows output, DVI-D-0 stays blank (via xrandr)
Booted with DVI-I-1 + plugging in DVI-D-0 after boot + removing DVI-I-1: DVI-D-0 stays blank (via xrandr)
Booted with DVI-I-1 + plugging in HDMI-A-0 after boot + removing DVI-I-1 + plugging in DVI-D-0: HDMI-A-0 shows output, DVI-D-0 stays blank (via xrandr) When switching to a virtual termina, HDMI-A-0 goes blank, DVI-D-0 shows output