I am using Ubuntu Gnome on a Lenovo Y50-70 with a GTX 860M.
I have been unable to successfully configure /etc/default/grub.
I want GRUB to display on my HDMI monitor but it only displays on my laptop inbuilt eDP display.
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I'm pretty sure this is something that would need to be configured in the BIOS/UEFI. – Nathan Osman Aug 29 '16 at 2:35
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@NathanOsman: Why? I have a similar situation (laptop with external monitor): After boot linux switches to the external monitor. Why shouldn't grub (be able to) do the same. Unless this function is simply not implemented. – Giorgio Oct 13 '16 at 19:16
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Because Grub doesn't interact with the graphics card the same way a Linux desktop does. – Nathan Osman Oct 13 '16 at 19:28
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First of all I want to clear something This issue has nothing to do with your graphics card It is all about the resolution of your displays (Either the laptop or the external display) For Example - If your laptop screen is set 1360x768 but your external display is 1600x900 In order to show the grub menu or the BIOS of your laptop on the external display simply set the external display's resolution to match the laptop's display resolution. don't forget to disable the laptop display before a reboot This worked for me
