Recently I had made clean install of windows 10 and after that dual boot with ubuntu 20.10. When I turn my PC on, it automatically starts Windows without showing grub menu. Some time before I had dual boot, just with Ubuntu 20.04 instead .10 and everything worked fine.
I have tried with commenting GRUB_STYLE = hidden, and with changing that hidden to menu, but that didn't worked. This was done in the /etc/default/grub
file
Should I change something in UEFI?
I can boot to ubuntu only if I press ESC
on startup, and when advanced options for UEFI shows, go for F9
to see Boot device options. There I have option for booting up the Ubuntu.