I'm using an HP EliteBook running Ubuntu 20.04. The laptop has a Display output on one side and a VGA output on the other side.
I am trying to set up a 3 monitors display. When I connect my two extra monitors on both outputs, Ubuntu Settings, under "Displays", tells me that I have indeed 3 monitors connected. However, the VGA port only states "Unknown Display", and the monitor shows "no signal".
Using a Display/VGA adapter, I have been able to test each of the screens and cables. Every component works fine in a 2 monitors configuration when using the Display output. I can't get any of the screens to work in a 2 monitors configuration using the VGA output.
I have tried sudo ubuntu-drivers autoinstall but found no drivers to install.
Thanks in advance for helping me understand the issue, and hopefully fix it.
EDIT :
$ sudo lshw -c video *-display description: VGA compatible controller product: Skylake GT2 [HD Graphics 520] vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 07 width: 64 bits clock: 33MHz capabilities: pciexpress msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:128 memory:e0000000-e0ffffff memory:d0000000-dfffffff ioport:3000(size=64) memory:c0000-dffff 
