Comment 7 for bug 1381175

I confirm that the problem exist on a fresh install of Vivid 15.04 (STABLE).

System Info: Ubuntu GNOME 15.04
Linux z50 3.19.0-15-generic #15-Ubuntu SMP Thu Apr 16 23:32:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Nvidia Card: GeForce GT840M

dmesg | grep vgaar
[ 0.265967] vgaarb: setting as boot device: PCI:0000:00:02.0
[ 0.265970] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[ 0.265973] vgaarb: loaded
[ 0.265974] vgaarb: bridge control possible 0000:00:02.0
[ 18.814697] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 23.496165] vgaarb: this pci device is not a vga device
[ 25.991425] vgaarb: this pci device is not a vga device
[ 30.677428] vgaarb: this pci device is not a vga device
[ 38.263727] vgaarb: this pci device is not a vga device

lspci lists the card as "3D Controller".