again it sounds like linux isn’t properly seeing the edid data for that monitor. if it comes to the worst option you might just have to find an active adapter.
I just realized that you never gave the output of just
xrandr
go ahead and post that we may get some insight from there
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384
DisplayPort-2 connected primary 2560x1080+1280+0 (normal left inverted right x axis y axis) 798mm x 334mm
2560x1080 59.98 + 74.99*
1920x1080 74.98 60.00 60.00 50.00 59.94
1680x1050 59.95
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.98
1280x800 59.81
1152x864 75.00 59.97
1280x720 60.00 50.00 59.94
1024x768 75.03 60.00
832x624 74.55
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
HDMI-A-2 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)
DVI-D-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
1280x1024 60.02*+ 75.02
1280x960 60.00
1280x800 60.02
1152x864 75.00
1280x720 60.02
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
640x480 75.00 72.81 66.67 59.94
720x400 70.08
VGA-1-1 disconnected (normal left inverted right x axis y axis)
HDMI-1-1 disconnected (normal left inverted right x axis y axis)
HDMI-1-2 disconnected (normal left inverted right x axis y axis)
DP-1-1 disconnected (normal left inverted right x axis y axis)
DP-1-2 disconnected (normal left inverted right x axis y axis)
I’m fairly certain that you want DVI-D-1 to actually be connected as VGA-1-1. I’m not sure how to get it to do this but hopefully that will get you closer to a solution.
I am thinking about editing vBIOS as a last free chance, if I can find that tool I used now and where to find port config. Looks like just buying an adaptor is a safer choice.
Okay. My GPU is definately damaged. It kind of works in linux (not all the videos on youtube play and some other stuff), but instantly crashes, BSODs and artifacts in windows, tested with 2 PCs and 4 vBIOSes (1 was custom and tested by me for more than a year). Looks like I am on iGPU for now, going to RMA the card on monday (1st time in my life with PC hardware, it’s so weird) and wait untill I have a bit more modern GPU to play with Linux.
And active adapter is also on its way here, so looks like this thread is useless, unless someone has a clue about how to resurrect my R9 380.