(Mainly you get to choose between RST, AHCI and IDE (or legacy or whatever), with AHCI the most likely one. All UEFI/BIOS settings will be lost - do this only if you know how the UEFI is configured now - if, for example, your SATA controller was set to something other than the default, you'll have trouble accessing the contents of your harddisk(s). If all else fails: refer to your hardware manual looking for BIOS setup reset (usually involves opening the case, removing the battery, placing a jumper, removing it and restarting). This will make grub remember what was started last - handy when Windows wants to endlessly restart during major updates. ![]() Again, this will probably only work on decent UEFI implementations.Ī side note: On dual boot systems, I set GRUB_DEFAULT=saved and add a line GRUB_SAVEDEFAULT=true. Once in the UEFI setup, disable FastBoot, save and reboot, select Ubuntu, en reset the default in /etc/default/grub back to the old value (0, probably). You could even select that OS from Redmond and try your luck there. To 'set' the default option you'll boot the next time. (or use vi instead of nano) and set the GRUB_DEFAULT= to the value you counted. Then edit the default that grub will boot: sudo nano /etc/default/grub IF it does, count the menuentries starting from 0. Run: grep -e "^menuentry " /boot/grub/grub.cfgĪnd see if it has UEFI Firmware Settings. ![]() Note that this does not work for all UEFI firmware, depending on the quality of the implementation.Īnother way to get out of this catch 22 would be altering the grub default. go to:Control Panel-Hardware and Sound-Power Options-Choose what the power button does and you will see the check box for Turn on fast startup in Shutdown. On GNU/Linux systems, try: sudo systemctl reboot -firmware-setupĪnd then reset the fastboot option. This is possible on Windows (but off-topic here). A) Click/tap on the Download button below to download the BAT file below, and go to step 5 below. Assuming that your machine still boots, you could try and reboot your current OS into the UEFI settings.
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