Comment 91 for bug 1386005

Ubuntu 16-04.2 LTS, FDE install then switched to Nvidia driver in additional drivers, reboot unable to enter password to unlock disk

#87 worked for me by editing boot options
>I already have 'nosplash noplymouth', removing the follwing
load_video
gfxmode
splash $vt.handoff

But I had no success by editing grub mentioned in #90, seems like a bug https://bugs.mageia.org/show_bug.cgi?id=15673
getting ubuntu 16.04 - error: invalid video mode specification 'text' . Booting in blind mode

So how can I update grub to remove 'load_video' and 'gfxmode'?