On my dual-boot Acer laptop (win8.1 and 14.04) I mostly use the HDMI port and 24" monitor. Sometimes I need to boot to windows but can't see the grub menu as the laptop internal monitor is turned off.
This guy has the same issue. Force grub to use monitor
So far I cannot find anything that works, good or bad practices not withstanding.
I checked the BIOS settings and nothing there for monitors.
Can anyone help out with this please?