Hi, I have an amd rx580 with 2 monitors connected by display port. The 2 monitors are the same brand and model. When using the amdgpu driver with amdgpu.dc=0, the device names ( DisplayPort-2 and DisplayPort-3 ) stay consistent, but when using amdgpu.dc=1, the device names change randomly ( or at least not consistent ). They sometimes are DisplayPort-4 and DisplayPort-5 , sometimes DisplayPort-4 and DisplayPort-6, making me have to configure Xorg at every boot ( to correct the placement of the monitors, which is left and which is right ) and configure kde plasma and sway ( because they base their configurations on the device names ). Currently I switched to using amdgpu.dc=1 because amdgpu.dc=0 locks computer after a wake up from suspend ( with amdgpu.dc=1 it does not ). Thanks !
Please attach your xorg log (if using X) and dmesg output. dc support DP MST while the old dp=0 code does not. With DP MST ports are added dynamically since you can have multiple DP monitors connected to a single physical port on the computer.
Created attachment 287099 [details] xorg and dmesg log - boot 1
Created attachment 287101 [details] xorg and dmesg log - boot 2
Hi, submitted two attachments, they have the xorg and dmesg log of bootup until login manager ( in this case sddm ) appears. bootup 1 is the first reboot, and bootup 2 is a reboot right after getting the previous logs, nothing else was done in between. Thanks.