I have find the root cause since I encounter the same problem
the grub-pc fail to install because of its dependency package grub-common is not installed.
I change my preseed.cfg file to add the following line to fix this problem:
d-i pkgsel/include string grub-common
Also, there need some formal resolution.
I have find the root cause since I encounter the same problem
the grub-pc fail to install because of its dependency package grub-common is not installed.
I change my preseed.cfg file to add the following line to fix this problem:
d-i pkgsel/include string grub-common
Also, there need some formal resolution.