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I'm having problems when Iḿ trying ¿to install any package or software. My OS is Ubuntu 20.04. I've already tried all the solutions mentioned in this post https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/1871963, including configure the UEFI, following the next comand lines:

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

etc.

The error message appears even when the upgrades and is installed an app from the "Ubuntu Software" application...

Errors were encountered while processing:
grub-efi-amd64-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)

Thanks!

Kurama794
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  • Run `sudo apt-get install --fix-broken` and if that didn't fix provide the output. – Tin Nguyen Sep 23 '20 at 07:29
  • Thanks for the suggestion but it doesn't work :( this is the output from the terminal screen: Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 55 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Setting up grub-efi-amd64-signed (1.142.6+2.04-1ubuntu26.4) ... – Kurama794 Sep 24 '20 at 04:57
  • `dpkg: error processing package grub-efi-amd64-signed (--configure): installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1 Errors were encountered while processing: grub-efi-amd64-signed E: Sub-process /usr/bin/dpkg returned an error code (1)` – Kurama794 Sep 24 '20 at 05:03
  • Remove the broken pkgs `grub-efi-amd64-signed`. (However I'm not very familiar with grub and if you are using grub there is a chance your system won't boot anymore.) – Tin Nguyen Sep 24 '20 at 07:22
  • [so] is for programming questions, not questions about using or configuring Unix and its utilities. [unix.se] or [ubuntu.se] would be better places for questions like this. – Barmar Oct 14 '20 at 21:31

1 Answers1

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I had this same problem the last few days. Months ago I installed Ubuntu 20.04 alongside Win10 I had to switch the BIOS to AHCI from RAID as it wouldn't allow install. Then after install I could switch back to RAID to allow Win10 dual boot. However along some update it messed it up and I had to switch back to AHCI and reinstalled grub as above. It sorted the problem.

Paul McFarland
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