Comment 3 for bug 1688253

Another interesting finding with grep'ing around in /var/log for VGA-1:

root@vega:/var/log# grep VGA-1 syslog
May 4 14:27:10 vega unity-settings-[1644]: unable to get EDID for xrandr-VGA-1: unable to get EDID for output

And maybe the even more interesing part in /var/log/gpu-manager.log

log_file: /var/log/gpu-manager.log
last_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
new_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
can't access /run/u-d-c-nvidia-was-loaded file
can't access /run/u-d-c-fglrx-was-loaded file
Looking for fglrx modules in /lib/modules/4.10.0-21-generic/updates/dkms
Looking for nvidia modules in /lib/modules/4.10.0-21-generic/updates/dkms
Is nvidia loaded? no
Was nvidia unloaded? no
Is nvidia blacklisted? no
Is fglrx loaded? no
Was fglrx unloaded? no
Is fglrx blacklisted? no
Is intel loaded? yes
Is radeon loaded? no
Is radeon blacklisted? no
Is amdgpu loaded? no
Is amdgpu blacklisted? no
Is nouveau loaded? no
Is nouveau blacklisted? no
Is fglrx kernel module available? no
Is nvidia kernel module available? no
Vendor/Device Id: 8086:152
BusID "PCI:0@0:2:0"
Is boot vga? yes
Skipping "/dev/dri/card0", driven by "i915"
Skipping "/dev/dri/card0", driven by "i915"
Skipping "/dev/dri/card0", driven by "i915"
Found "/dev/dri/card0", driven by "i915"
output 0:
        card0-VGA-1
Number of connected outputs for /dev/dri/card0: 1
Does it require offloading? yes
last cards number = 1
Has amd? no
Has intel? yes
Has nvidia? no
How many cards? 1
Has the system changed? No
main_arch_path x86_64-linux-gnu, other_arch_path i386-linux-gnu
Current alternative: /usr/lib/x86_64-linux-gnu/mesa/ld.so.conf
Current core alternative: (null)
Current egl alternative: /usr/lib/x86_64-linux-gnu/mesa-egl/ld.so.conf
Is nvidia enabled? no
Is nvidia egl enabled? no
Is fglrx enabled? no
Is mesa enabled? yes
Is mesa egl enabled? yes
Is pxpress enabled? no
Is prime enabled? no
Is prime egl enabled? no
Is nvidia available? no
Is nvidia egl available? no
Is fglrx available? no
Is fglrx-core available? no
Is mesa available? yes
Is mesa egl available? yes
Is pxpress available? no
Is prime available? no
Is prime egl available? no
Single card detected
Nothing to do
No change - nothing to do