Could you please issue the following commands:
sudo apt-get update
sudo apt-get install grub
sudo dpkg-reconfigure grub
and tell me if the updates work afterwards? Seems some files related to the
GRUB configuration got corrupt.
** Changed in: grub2 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1032588
Title:
package memtest86+ 4.20-1.1ubuntu1 failed to install/upgrade:
subprocess installed post-installation script returned error exit
status 2
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