I've installed ubuntu mate (dual boot with win8) for a month ago.
The problem starts when i want to enter BIOS menu. When i turn on my laptop, it doesn't show screen like "Press F2 to enter bios menu", but grub appear and i can boot normally
After i encountered that problem, i try to install lenovo onekey recovery and boot up my laptop again using "recovery button" on my laptop. When boot up it show a menu where i can choose option like "Select boot disk" "recovery menu" aanndd "Enter BIOS menu". But Everytime i choose "Enter BIOS menu" option, it doesn't show BIOS menu, it show grub menu instead where i can choose which OS i want to boot.
Can anyone have solution so i can access BIOS menu again? i've already tried using boot-repair and grub-update.