edit /etc/default/grub:
GRUB_CMDLINE_LINUX_DEFAULT="<default paramaters> video=LVDS-1:d"
update your changes to grub:
update-grub
edit /etc/default/grub:
GRUB_CMDLINE_LINUX_DEFAULT="<default paramaters> video=LVDS-1:d"
update your changes to grub:
update-grub