Ubuntu – Error processing package grub-efi-amd64-signed ubuntu 20.4


i have upgraded ubuntu 18.4.4 to 20.4 but i'am wrong to located the grub into /boot/efi partition i can't change it

`sudo apt-get upgrade
Reading package lists… Done
Building dependency tree
Reading state information… Done
Calculating upgrade… Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up grub-efi-amd64-signed (1.142+2.04-1ubuntu26) …
mount: /var/lib/grub/esp: /dev/sdb already mounted or mount point busy.
dpkg: error processing package grub-efi-amd64-signed (–configure):
installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 32enter image description here
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)

can help me to fix this ?

the picture not want to disable /boot/efi when i choose grub install device

Best Answer

Try purging grub and reinstall. Worked for me!

sudo apt-get purge grub\*
sudo apt-get install grub-efi
sudo apt-get autoremove
sudo update-grub