Azure,
мне не помогло
у меня при уcтановкиВинды создал efi system
вот мой выброс на fdisk -l
Disk /dev/loop0: 1 GiB, 1115594752 bytes, 2178896 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
Disk /dev/sda: 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: 89CDCDC2-C43A-473B-A72A-F2B3A22482F9
Device Start End Sectors Size Type
/dev/sda1 2048 616447 614400 300M Windows recovery environment
/dev/sda2 616448 821247 204800 100M EFI System
/dev/sda3 821248 1083391 262144 128M Microsoft reserved
/dev/sda4 1083392 314574847 313491456 149.5G Microsoft basic data
/dev/sda5 314574848 322574335 7999488 3.8G Linux swap
/dev/sda6 322574336 522573823 199999488 95.4G Linux filesystem
Disk /dev/sdb: 14.5 GiB, 15504900096 bytes, 30283008 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: dos
Disk identifier: 0xcad4ebea
Device Boot Start End Sectors Size Id Type
/dev/sdb4 * 63 30283007 30282945 14.5G c W95 FAT32 (LBA)
в /boot/grub его нету
после в Efi я нашел /mnt/EFI/ubuntu/grub.cfg