ilk yol
sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get updatesudo apt-get install -y boot-repairboot-repairAyrıntılı kısım
Adding boot menu entry for EFI firmware configuration (bu kısım Google aratınca Bios Güncellemesi ile alakalı dokumanlar çıkıyor )
https://www.thomas-krenn.com/en/wiki/Restore_Ubuntu_UEFI_Boot_Entries_after_BIOS_UpdateSetting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.(bunun için ise şöyle bir çözüm var )
sudo update-grubGenerating grub.cfg ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-3.11.0-19-generic
Found initrd image: /boot/initrd.img-3.11.0-19-generic
Found linux image: /boot/vmlinuz-3.11.0-15-generic
Found initrd image: /boot/initrd.img-3.11.0-15-generic
Found memtest86+ image: /boot/memtest86+.bin
done
sudo gedit /etc/default/grubGRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=countdown
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.modeset=1"
GRUB_CMDLINE_LINUX=""
sudo update-grubGenerating grub.cfg ...
Found linux image: /boot/vmlinuz-3.11.0-19-generic
Found initrd image: /boot/initrd.img-3.11.0-19-generic
Found linux image: /boot/vmlinuz-3.11.0-15-generic
Found initrd image: /boot/initrd.img-3.11.0-15-generic
Found memtest86+ image: /boot/memtest86+.bin
done
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1258597