The following packages have been kept back: grub-efi-amd64-signed
我已经有几个星期出现这个错误了。有谁知道原因吗？
编辑：
sudo apt update
Reading package lists... Done
Building dependency tree
Reading state information... Done
1 package can be upgraded. Run 'apt list --upgradable' to see it.
sudo apt upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
grub-efi-amd64-signed
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
sudo apt dist-upgrade
Reading package lists... Done …