When I boot the laptop, keyboard does not work, so default entry (debian) boots after 5 secs. After rebooting once, keyboard works on grub so i can select any entry. Laptop model is Toshiba Satellite L655-1JW. Thanks
Well, I disabled "Fast Boot" at BIOS and everything works. Although I prefer booting faster and do not want to see manufacturer's logo at startup, severity is not important to me anymore. Thank you for your time and hope the problem to be solved someday.