我有一台设置了 Ubuntu 和 Windows 10 双启动的电脑，几个月来运行良好。最近，Ubuntu 在通过 Grub 或 BIOS 启动覆盖启动时开始出现黑屏（可能是 Windows 10 更新造成的）。
我已经用 Boot-Repair 刷新了 USB，并且可以通过 Live USB 成功启动。但是，Boot-Repair 要求在禁用 CSM/Legacy 模式的情况下启动。当我在 BIOS 中禁用 CSM 时，我在启动时收到错误，提示“VGA 卡与 UEFI 不兼容，CSM 设置已更改以实现兼容性”，这似乎会自动重新启用 CSM，而没有任何选项可以禁用它，从而阻止我使用 Boot 修复。
我该怎么办？
编辑：我的显卡不支持 UEFI 模式。我不知道现在该如何运行 Boot-Repair。
启动修复启动信息摘要摘录：
=> No boot loader is installed in the MBR of /dev/sda.
=> Windows 7/8/10/11/2012 is installed in the MBR of /dev/sdb.
=> Windows 7/8/10/11/2012 is installed in the MBR of /dev/sdc.
sda1: __________________________________________________________________________
File system: vfat
Boot sector type: Windows 7/2008: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /efi/Boot/bootx64.efi /efi/Boot/fbx64.efi
/efi/Boot/mmx64.efi /efi/ubuntu/grubx64.efi
/efi/ubuntu/mmx64.efi /efi/ubuntu/shimx64.efi
/efi/ubuntu/grub.cfg /efi/Microsoft/Boot/bootmgfw.efi
/efi/Microsoft/Boot/bootmgr.efi
sda2: __________________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
sda3: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 7/2008: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows 8 or 10
Boot files: /Windows/System32/winload.exe
sda4: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 8/10/11/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sdb1: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 8/10/11/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sdc1: __________________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
sdc2: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 7/2008: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sdc3: __________________________________________________________________________
File system: vfat
Boot sector type: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sdc4: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 22.04.2 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub
sdd: ___________________________________________________________________________
File system: iso9660
Boot sector type: Unknown
Boot sector info:
Operating System:
Boot files: /boot/grub/grub.cfg
================================ 2 OS detected =================================
OS#1: Ubuntu 22.04.2 LTS on sdc4
OS#2: Windows 8 or 10 on sda3
Suggested repair: ______________________________________________________________
The default repair of the Boot-Repair utility would purge (in order to unsign) and reinstall the grub-efi of
sdc4,
using the following options: sdc3/boot/efi
Additional repair would be performed: unhide-bootmenu-10s use-standard-efi-file
Blockers in case of suggested repair: __________________________________________
The current session is in BIOS-compatibility mode. Please disable BIOS-compatibility/CSM/Legacy mode in your UEFI firmware, and use this software from a live-CD (or live-USB) that is compatible with UEFI booting mode. For example, use a live-USB of Boot-Repair-Disk-64bit (www.sourceforge.net/p/boot-repair-cd), after making sure your BIOS is set up to boot USB in EFI mode. 64bits detected. Please use this software in a 64bits session. (Please use Boot-Repair-Disk-64bit (www.sourceforge.net/p/boot-repair-cd) which contains a 64bits-compatible version of this software.) This will enable this feature.
Final advice in case of suggested repair: ______________________________________
Please do not forget to make your UEFI firmware boot on the Ubuntu 22.04.2 LTS entry (sdc3/efi/****/grub****.efi (**** will be updated in the final message) file) !
If your computer reboots directly into Windows, try to change the boot order in your UEFI firmware.
If your UEFI firmware does not allow to change the boot order, change the default boot entry of the Windows bootloader.
For example you can boot into Windows, then type the following command in an admin command prompt:
bcdedit /set {bootmgr} path \EFI\****\grub****.efi (**** will be updated in the final message)
The boot of your PC is in BIOS-compatibility/CSM/Legacy mode. You may want to retry after changing it to UEFI mode.