我在笔记本电脑上安装了 ubuntu 17.04，5 个月内一切运行正常，但几天后我开始遇到这个错误
尝试执行以下命令时：
sudo apt-get install ppa-purge
我得到这个输出：
Reading package lists... Done
Building dependency tree
Reading state information... Done
ppa-purge is already the newest version (0.2.8+bzr63).
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
2 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 (2.02~beta3-4ubuntu7.3) ...
dpkg: error processing package grub-efi-amd64 (--configure):
subprocess installed post-installation script returned error exit status 128
dpkg: dependency problems prevent configuration of grub-efi-amd64-signed:
grub-efi-amd64-signed depends on grub-efi-amd64 (= 2.02~beta3-4ubuntu7.3); however:
Package grub-efi-amd64 is not configured yet.
dpkg: error processing package grub-efi-amd64-signed (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
grub-efi-amd64
grub-efi-amd64-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)
提前致谢。