我不知道如何完全加载操作系统和登录/密码屏幕，PC 停在 Ubuntu 黑屏上并卡在那里：
这是我的 HDD 在 GParted 中的情况，似乎一切正常：
我的磁盘情况如下：
Disk /dev/loop0: 2.13 GiB, 2285019136 bytes, 4462928 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/loop1: 4 KiB, 4096 bytes, 8 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/loop2: 61.93 MiB, 64917504 bytes, 126792 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/loop3: 65.22 MiB, 68378624 bytes, 133552 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/loop4: 54.24 MiB, 56872960 bytes, 111080 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/loop5: 248.78 MiB, 260841472 bytes, 509456 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/loop6: 43.6 MiB, 45703168 bytes, 89264 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: 596.18 GiB, 640135028736 bytes, 1250263728 sectors
Disk model: ST640LM001 HN-M6
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: 4D164AE1-B36F-4F3F-8525-11EFE9BC7156
Device Start End Sectors Size Type
/dev/sda1 2048 1050623 1048576 512M EFI System
/dev/sda2 1050624 1250263039 1249212416 595.7G Linux filesystem
Disk /dev/sdb: 14.96 GiB, 16039018496 bytes, 31326208 sectors
Disk model: v165w
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: 0x1693364d
Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 0 6599743 6599744 3.2G 0 Empty
/dev/sdb2 5930192 5938191 8000 3.9M ef EFI (FAT-12/16/32)
/dev/sdb3 6602752 31326207 24723456 11.8G 83 Linux
有没有什么办法可以恢复操作系统？我之前开过一个帖子，说我删除了所有坏块，但现在只有操作系统无法加载。