After I updated from 16.04 to 18.04 my dual screen setup has stopped working.
I have two monitors, one connected from hdmi and one connected from vga.
Both are connected straight from the motherboard(no dedicated gpu).
The hdmi one works fine but the vga one doesn't show any video. I can move my mouse over to where it should be so ubuntu recognises it but it still doesn't show any output.
hdmis resolution is 1920x1080 and vgas set resolution is 1280x1024 (worked fine on ubuntu 16.04)
other solutions suggested copying ~./config/monitors.xml but no such file exists.
I'm using xfce with lightdm as a login manager
output of xrandr is
Screen 0: minimum 320 x 200, current 3200 x 1080, maximum 8192 x 8192 VGA-0 connected 1280x1024+1920+0 (normal left inverted right x axis y axis) 340mm x 270mm 1280x1024 60.02*+ 75.02 1152x864 75.00 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 640x480 75.00 72.81 59.94 720x400 70.08 HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm 1920x1080 60.00*+ 59.94 1680x1050 59.88 1280x1024 75.02 60.02 1440x900 59.90 1280x960 60.00 1280x800 59.91 1152x864 75.00 1280x720 60.00 59.94 1024x768 75.03 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 720x480 60.00 59.94 640x480 75.00 72.81 66.67 60.00 59.94 720x400 70.08
output of sudo lshw -c video
*-display description: VGA compatible controller product: BeaverCreek [Radeon HD 6550D] vendor: Advanced Micro Devices, Inc. [AMD/ATI] physical id: 1 bus info: pci@0000:00:01.0 version: 00 width: 32 bits clock: 33MHz capabilities: pm pciexpress msi vga_controller bus_master cap_list rom configuration: driver=radeon latency=0 resources: irq:37 memory:c0000000-cfffffff ioport:f000(size=256) memory:fef00000-fef3ffff memory:c0000-dffff
Any help would be great thank you