https://bugs.kde.org/show_bug.cgi?id=433107
--- Comment #6 from Andrew Ammerlaan <andrewammerl...@riseup.net> --- By (un)plugging some of the monitors I found something interesting. The problem is with HDMI-1-2(which contrary to what the name suggests is a DisplayPort), if this iGPU-port is connected I run into the problem I described. - If this port is not connected everything works fine (2 remaining on the iGPU, 4 total). - If I move the monitor that was connected to this port, to a port on the AMDGPU everything is also fine (same total number of monitors, 5) - If I remove one of the other monitors connected to the iGPU, I still have the same problem. - If I remove all monitors connected to the iGPU, but leave only this port connected, I still have the same problem. - If I connect a different monitor to this port, I still have the same problem (therefore, it is not specific to that monitor, it is the port) I don't know if this is related, but I've had other issues with this specific port as well. If this port is connected *and* the iGPU is the boot-GPU (no matter what other things are connected) the system POST is not displayed at all, and the BIOS and Grub are inaccessible. In this situation the monitors only start showing something once the linux kernel takes over the framebuffer. And for some reason the naming of the ports on the iGPU is all messed up (and has been for as long as I had this computer), DisplayPort is named HDMI-1-2, VGA is named DP-1-5, DVI is named HDMI-1-3 but that is probably a kernel thing and unrelated. I should add that this port is connected through a DisplayPort to HDMI adapter, since I do not have a DisplayPort capable monitor I cannot test without it. So whenever I say that this port 'is connected' it is implied that this is through this converter. That being said, this port works just fine in X, so there is still some bug here. -- You are receiving this mail because: You are watching all bug changes.
