![]() On my system, it was easy to enter the firmware setup screen at this point (see below), and change the boot priority to "ubuntu" (which was the entry for booting my OS via EFI). My system happened to default to MBR boot to start with, so I saw a scary error from GRUB - but it was from the old grub-pc. Make sure you boot through EFI! This is the system-dependent and worrying part. During the install, you will see errors about not being able to access EFI variables, which is because you didn't boot by EFI. Fedora seems a bit different I've only tried this on Ubuntu. (grub-efi actually still worked after I removed it!). This removed grub-pc, and stopped it from working. (I also staged the conversion, making sure I could boot from BIOS-GPT before I tried UEFI-GPT, which involved having to create yet another type of boot partition.). ![]() You can't do that if the partition is mounted, so you'll want to use a boot CD. But for one, you probably need to shrink the last partition, to make space for the end-of-disk GPT. gdisk can convert, but there are quite a few fiddly bits. I'm not going to cover conversion from MBR to GPT. The hard part is you're probably still using an MBR partition table, and you almost certainly need to convert it to GPT. If you can currently enter the firmware setup, then it's not all that bad. Admittedly, there are a couple of confusing warning messages. I was converting an existing install to EFI, without an EFI-enabled boot CD. Some day I'll figure out what's happening here. However I now believe it relies on extra behaviour which is not part of the UEFI standard. Converting from BIOS-GPT boot to UEFI-GPT boot without burning an EFI boot CD?ĮDIT: this section may work on some systems. I didn't install as EFI, which meant I had to kick it (see below, step 4). If you do an EFI install from scratch, I believe the menu item will be created automatically. you can enter the GRUB menu, follow the on-screen instructions to switch to the command line, then type "fwsetup" and hit return. If you're curious, I looked at the command as well: it's "fwsetup". ![]() I press it down immediately after the NumLock light turned on on the keyboard, and that works for me. You can enter the GRUB boot menu by holding down the shift key "early in the boot process". It's able to create an entry for firmware setup in the GRUB boot menu. Entering firmware setup from the grub-efi boot menuĮfibootmgr doesn't seem to support rebooting to firmware setup for me. I misread the release notes originally - it probably wouldn't be any faster). I have tried EFI booting with Ubuntu 12.04, and found an answer to my own question. Just if this is known to be a bad idea, I don't want to go through the risk of a firmware upgrade for nothing (and maybe have to pop the case off, reset the settings and have to set them all up again).Īlternatively, how is this handled for Windows 7 users? If they optimistically select the fast boot option, how do they get access to the "BIOS" setup again when they need it? The flip side is that the option might make it even harder to "reveal the BIOS" than it already is. It suggests that an upgraded version of the firmware contains a fast boot option. So does Linux also have a new way to enter UEFI setup? The main developer of Secure Boot for Linux says that alternative OS's can't assume the old way will continue to work. If you’re just here to access your computer’s UEFI BIOS, click the Troubleshoot tile. No longer do we press a certain key during the boot process to reveal the BIOS – instead, an option to access the BIOS is located in Windows 8’s boot options menu. From How To Access The BIOS On A Windows 8 Computer: explains that Windows 8 certified hardware has a new way to enter the UEFI setup screen (equivalent to BIOS).
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