I have a Dell XPS-15 9570 and I am also affected by this bug.
I am currently running 18.10.
The external monitor does not work with HDMI at all - when I plug it in to the machine, the monitor switches to low power mode.
The same monitor is working fine over HDMI with a Dell M3800 running 16.04
I have a Dell XPS-15 9570 and I am also affected by this bug.
I am currently running 18.10.
The external monitor does not work with HDMI at all - when I plug it in to the machine, the monitor switches to low power mode.
The same monitor is working fine over HDMI with a Dell M3800 running 16.04