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I just upgraded my Ubuntu 18.04 to latest version and this caused my system to freeze when booting, after investigation I found that cupsd service was not running, if I try to run it manually I get a relocation error.

I do not have the full error message now but it was about a missing symbol in this library file libidn2.so.0.3.6.

To solve this I brought this old file libidn2.so.0.3.3 from my brother's laptop and replaced it with the old file and made sure that the symlink /usr/lib/x86_64-linux-gnu/libidn2.so.0 pointed to the new file.

This solved my issue, I created this question to help you solve this problem if you face it in the near time.

Mohsen Ibrahim
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4 Answers4

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It hosed my system (network, access to terminal etc.) and the update came from

libidn2-0:amd64 2.2.0-1+ubuntu18.04.1+deb.sury.org+1

which I believe is a backport repository for PHP 7.4.

Here is bug report on backport homepage (scroll halfway down)

https://github.com/oerdnj/deb.sury.org/issues/1247

Link to working deb (18.04 X64)

http://archive.ubuntu.com/ubuntu/pool/main/libi/libidn2/libidn2-0_2.0.4-1.1build2_amd64.deb

Peter Schumacher
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This broke apt and several other services on my servers.

I needed to downgrade as well, but no access to "my brother's laptop." So, I went here: https://packages.ubuntu.com/bionic/libidn2-0. I then went to the proper architecture download page. I copied to the clipboard one of the links and then used wget to download the library. I installed it with dpkg. It seems to have worked, but apt sees that the library needs to upgraded, but at least apt is working again as well as Samba.

Whitefish Personalized Healthc
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To solve this I brought this old file libidn2.so.0.3.3 from my brother's laptop and replaced it with the old file and made sure that the symlink /usr/lib/x86_64-linux-gnu/libidn2.so.0 pointed to the new file.

This solved my issue, I created this question to help you solve this problem if you face it in the near time.

Mohsen Ibrahim
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the solution at the bottom of this thread works

Relocation error, error code (127) after last updates

basically brings you down to 2.0.5

AlvinCNY
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