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grub-install fails on Acer Aspire S7-393
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dartleader
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PostPosted: Mon Apr 22, 2019 9:11 pm    Post subject: grub-install fails on Acer Aspire S7-393 Reply with quote

Hello Gentoo friends, I am currently stumped while trying to install Gentoo on my Acer Aspire S7-393 Laptop. Installation proceeds without incident until I run grub-install: I get the error "EFI variables are not supported on this system."

I have rebuilt the kernel twice and triple-checked that I have included support for EFI wherever possible; the drive partition I am using as my /boot is formatted as vfat. My disk is formatted identically to my Gentoo box which is running fine, with the exception that my Gentoo box has an empty BIOS boot partition of 10MB as recommended by the Handbook.

If anyone could advise, that would be great; thank you.
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Hu
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PostPosted: Tue Apr 23, 2019 2:17 am    Post subject: Reply with quote

EFI variables are not available if you boot using legacy non-EFI mode. Before you can configure your system's EFI bootloader, you must use your system's EFI bootloader to boot. Yes, this is a circular dependency. Blame the UEFI vendors for arranging that their variables are unavailable in legacy mode. Usually, you can find some way to coach the EFI environment into booting your system once without first configuring the EFI bootloader, at which point you can configure it so that subsequent boots can proceed without your coaching.
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dartleader
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PostPosted: Tue Apr 23, 2019 11:15 pm    Post subject: Reply with quote

Thank you for your response. I rebooted in UEFI mode with secure boot disabled, and no longer got the "EFI variables not supported" error. However, my computer deadended with a "No Bootable Device Found" when attempting to boot post-install.

I have rebooted again into legacy boot mode and am attempting to boot without UEFI. I don't need UEFI for any particular reason so it may be much simpler to just do without.
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Hu
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PostPosted: Wed Apr 24, 2019 1:47 am    Post subject: Reply with quote

If everything you care about works with legacy mode, I would stick with that. Some UEFI implementations are notoriously frustrating to manage.
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dartleader
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PostPosted: Thu Apr 25, 2019 1:07 am    Post subject: Reply with quote

Hu wrote:
If everything you care about works with legacy mode, I would stick with that. Some UEFI implementations are notoriously frustrating to manage.


I am able to boot in legacy mode so I'm going to leave it that way. I have no need for UEFI so I'll leave it without. Thanks for your help.
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