最近，我的 efi 启动分区出现了一些错误，导致我删除了它并新建了一个。从那时起，我就无法启动到 ubuntu - 尽管我使用 live usb 的启动修复来恢复 grub，但系统还是直接启动到 Windows 10。即使我插入 ubuntu live usb，我也看不到菜单，无法从中选择尝试 ubuntu 或安装它 - 它直接进入尝试 ubuntu。
我已经检查过我是否在 UEFI 模式下启动，并且安全检查已禁用。我的硬盘也在 UEFI 启动模式下启动。
当我尝试重新安装 ubuntu 时，安装程序找不到 efi 分区，导致失败。
分区：
Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: ST1000LM024 HN-M
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 670699A6-5183-4F2E-BC80-89DCB9776337
Device Start End Sectors Size Type
/dev/sda1 2048 2050047 2048000 1000M Windows recovery environment
/dev/sda2 2582528 4630527 2048000 1000M Lenovo boot partition
/dev/sda3 4630528 4892671 262144 128M Microsoft reserved
/dev/sda4 4892672 532027828 527135157 251.4G Microsoft basic data
/dev/sda5 532029440 1016504319 484474880 231G Linux filesystem
/dev/sda6 1016504320 1018341375 1837056 897M Windows recovery environment
/dev/sda7 1018341376 1019369471 1028096 502M Windows recovery environment
/dev/sda8 1019369472 1020291071 921600 450M Windows recovery environment
/dev/sda9 1020291072 1663533055 643241984 306.7G Linux filesystem
/dev/sda10 1663533056 1675251711 11718656 5.6G Linux swap
/dev/sda11 1675251712 1675661311 409600 200M EFI System
/dev/sda12 1911580672 1953523711 41943040 20G Windows recovery environment
Disk /dev/sdb: 14.7 GiB, 15728640000 bytes, 30720000 sectors
Disk model: ProductCode
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: 75B7A4EB-E75E-4E5D-9734-D9F461F17F7F
Device Start End Sectors Size Type
/dev/sdb1 2048 30719966 30717919 14.7G Microsoft basic data
Disk /dev/loop8: 35.3 MiB, 37027840 bytes, 72320 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
我将非常感激您的帮助。如果您需要，我也很乐意提供更多信息。