双系统升级Win10 20H1的时候Linux引导失效修理
The Situation
Dual boot: Win10 and Manjaro Linux.
When trying to update Win10 to the latest Win10 20H version, after rebooting my system, it did not enter the booting interface, rather it says:
Unknown filesystem, entering rescue mod
First Try
After searching the internet, I find this video shows the same problem.
However, after I ls my hd partion one by one on my pc, I found there are 3 partions showing they have ext2 filesystem. I think that is because they are:
- main partion for Linux
- boot partion of Linux
- swap partion
so I have to set boot and set prefix one by one and test. I typed:
set boot=(hd0,gpt7)
set prefix=(hd0,gpt)/boot/grub
insmod normal
normal
but they all show:
‘/boot/grub/xxx/normal.mod’ not found
Second Try
I found another tutorial from the comments of the above one. And it solves my problem.
After I type ls (hd0,gpt7)/(notice there is a backslash), it turns out that it only have grub/ under the partition, which means I should set prefix as (hd0,gpt7)/grub rather than (hd0,gpt7)/boot/grub.
It works and I successfully logged into my Linux system.
Still Something need to be done
But when I reboot my system the problem appears again! Like the situation in the forum.
Actually we should save the config, like @Oj G says in the comment of last video:
then launch your linux and write it to your terminal: “sudo update-grub " then “sudo grub-install /dev/sda” it will save your config
It works perfect!