I'm using a notebook with a second display connected with a VGA cable and I have Ubuntu 18.04.
I've never faced any issue before but after I started to play Age of Empires 2 HD (using Steam + protontricks) with full screen on my built-in display, the problems showed up. When I rebooted my computer, the second display didn't show anything.
So I went to Display settings, selected "Join Displays" options. The second monitor turned on for just a few seconds and then turned off right away. After some tweaks on Display settings, somehow the second monitor finally remained turned on, but it was a random behaviour.
I ran xrandr --listmonitors
and this was the output:
Monitors: 2
0: +*LVDS-1 1280/344x720/193+0+0 LVDS-1
1: +VGA-1 1280/373x720/209+0+0 VGA-1
And after running sudo lshw -C display
:
*-display
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:29 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:3000(size=64) memory:c0000-dffff
I suspect that it has something to do with my integrated graphics card, I believe it has messed up after I started to play that game on full resolution.
Do you know why my second monitor is not displaying anything?