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Slabity
n00b
Joined: 26 Dec 2013
Posts: 12
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 Posted: Fri Jan 10, 2014 7:52 am Post subject: Grub 2 won't detect Windows in UEFI |
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I set up my partitions as such:
| Code: | /dev/sda1 fat32 EFI
/dev/sda2 ext4 Gentoo
/dev/sda3 ntfs Windows |
I installed Gentoo first, without any bootloader. Then I successfully installed Windows, which properly put its own boot loader on the EFI partition.
After that, I install grub and os-prober in gentoo. My issue is that os-prober doesn't detect Windows at all, which therefore causes grub to only create a Linux entry.
Anyone know of any possible solutions? These are both fresh installs, and I have ntfs3g working. I might be just overlooking something stupid, but I can't seem to find any proper fix online. |
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RazielFMX
l33t
Joined: 23 Apr 2005
Posts: 835
Location: NY, USA
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| Posted: Thu Jan 16, 2014 4:04 pm Post subject: |
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I am very new to UEFI, but a few quick questions:
1) What version of Windows did you install?
2) Did you install grub from a UEFI booted medium? I had to load my EFI kernel onto a usb stick and boot from there to register my /boot/efi/efi/boot/bootx64.efi based kernel as an allowed boot device using /usr/sbin/efibootmgr (note: my EFI parition mounts to /boot/efi, not /boot, to be compatible with rEFInd and most other EFI tools, and I have a stand along /boot on /dev/sda2).
I ended up moving to rEFInd from a raw kernel boot for ease of upgrading my kernel (just copy it to /boot and good to go). rEFInd plays nice with multiple operating systems and was really easy to use so I recommend trying that if all else fails (but let's try to get your grub2 working).
The following resources might be really helpful (you probably have already read them, but I like to add info for those searching for similar issues later):
http://wiki.gentoo.org/wiki/EFI_stub_kernel
http://wiki.gentoo.org/wiki/UEFI_Gentoo_Quick_Install_Guide
http://wiki.gentoo.org/wiki/GRUB2#UEFI.2FGPT |
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Installing Gentoo
