Guys, thank you for your replies which I missed because I did not subscribe to the list before sending the first message. Turns out the replies are not sent to the topic openers, I have subscribed now.
Not sure if this message will me attached to the original thread or not, quoting here by hand: ================================================== Pascal Hambourg's reply: > Le 08/05/2018 à 06:58, David Collier a écrit : > >> I am having problems trying to make grub boot Windows 10. (I tried both >> version which came with 16.04 and the latest and greatest) > > Version of what ? > What versions ? > The latest and greatest what ? > I am talking about grub versions. I first tried enabling dual boot using grub version which was available through 'apt-get install grub' on Ubuntu 16.04, then I cloned git://git.savannah.gnu.org/grub.git and built/installed grub myself. >> what happens, >> it does not recognize any partitions of the hard drive where Windows 10 is >> installed. > > How do you know ? What do you do and what happens exactly ? > what happens is that when I run grub-mkconfit/update-grub the entry for Windows 10 does not get added to the grub boot menu. When I switch into grub command mode during boot, the 'ls' command shows the disks installed on the computer, but does not show any partitions on the disk where windows 10 is. > Did you install Ubuntu and Windows in the same boot mode (EFI or BIOS) ? > Yes, both installed using UEFI, on a computer which already had Ubnuntu I added a hard drive and installed Windows 10 on it. >> I can boot Windows by changing the BIOS default boot flow, the UEFI BIOS is >> able to do it just fine, but grub just does not refuse to detect Windows >> boot partition, or any partition on that drive to that matter. I used the > > "does not refuse" = "accepts" ? > my mistake, I meant to say "but grub just refuses to detect" >> 'disks' utility to change format of the Windows boot partition from FAT to >> NTFS, converting it to NTFS makes the BIOS stop recognizing it, but still >> does not help grub to recognize it. > Do you mean the EFI partition ? The BIOS does not care about Windows boot partition. I guess this is a terminology discrepancy, I am used to 'UEFI BIOS' and 'Legacy BIOS', if we are to follow your convention, my computer boots using UEFI. > > Please post the output of the following commands : > > dpkg -l "grub*" I built grub from source and instaledl it, what I have now is $ grub-mkconfig --version grub-mkconfig (GRUB) 2.03 > fdisk -l $ sudo fdisk -l /dev/sdc Disk /dev/sdc: 465.8 GiB, 500107862016 bytes, 976773168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: AF6118F0-6BF8-460C-9622-F5BDA7EE3204 Device Start End Sectors Size Type /dev/sdc1 2048 1023999 1021952 499M Windows recovery environment /dev/sdc2 1024000 1226751 202752 99M Microsoft basic data /dev/sdc3 1226752 1259519 32768 16M Microsoft reserved /dev/sdc4 1259520 976773119 975513600 465.2G Microsoft basic data > blkid $ for d in /dev/sdc*; do blkid $d; done /dev/sdc1 2048 1023999 1021952 499M Windows recovery environment /dev/sdc2 1024000 1226751 202752 99M Microsoft basic data /dev/sdc3 1226752 1259519 32768 16M Microsoft reserved /dev/sdc4 1259520 976773119 975513600 465.2G Microsoft basic data > os-prober $ sudo os-prober /dev/sde1:unknown Linux distribution:Linux:linux > efibootmgr -v $ efibootmgr -v efibootmgr: EFI variables are not supported on this system. > > Don't worry if the last one gives an error. thank you, -dc _______________________________________________ Help-grub mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-grub
