Same problem here. Installer tries to stop a process that doesn't exist. Then throws an error that it cannot stop the process (because it doesn't exist!) then fails to install correctly. So mysql server cannot be started:
Setting up mysql-common (5.8+1.0.5ubuntu2) ... (Reading database ... 136344 files and directories currently installed.) Preparing to unpack .../0-mysql-server-8.0_8.0.20-0ubuntu0.20.04.1_amd64.deb ... Failed to stop mysql.service: Unit mysql.service not loaded. invoke-rc.d: initscript mysql, action "stop" failed. invoke-rc.d returned 5 There is a MySQL server running, but we failed in our attempts to stop it. Stop it yourself and try again! dpkg: error processing archive /tmp/apt-dpkg-install-ZJV0dE/0-mysql-server-8.0_8.0.20-0ubuntu0.20.04.1_amd64.deb (--unpack): new mysql-server-8.0 package pre-installation script subprocess returned error exit status 1 Selecting previously unselected package libhtml-template-perl. Preparing to unpack .../1-libhtml-template-perl_2.97-1_all.deb ... Unpacking libhtml-template-perl (2.97-1) ... Selecting previously unselected package mecab-utils. Preparing to unpack .../2-mecab-utils_0.996-10build1_amd64.deb ... Unpacking mecab-utils (0.996-10build1) ... Selecting previously unselected package mecab-ipadic. Preparing to unpack .../3-mecab-ipadic_2.7.0-20070801+main-2.1_all.deb ... Unpacking mecab-ipadic (2.7.0-20070801+main-2.1) ... Selecting previously unselected package mecab-ipadic-utf8. Preparing to unpack .../4-mecab-ipadic-utf8_2.7.0-20070801+main-2.1_all.deb ... Unpacking mecab-ipadic-utf8 (2.7.0-20070801+main-2.1) ... Selecting previously unselected package mysql-server. Preparing to unpack .../5-mysql-server_8.0.20-0ubuntu0.20.04.1_all.deb ... Unpacking mysql-server (8.0.20-0ubuntu0.20.04.1) ... Errors were encountered while processing: /tmp/apt-dpkg-install-ZJV0dE/0-mysql-server-8.0_8.0.20-0ubuntu0.20.04.1_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1873931 Title: package mysql-server-8.0 8.0.19-0ubuntu5 failed to install/upgrade: installed mysql-server-8.0 package pre-removal script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-8.0/+bug/1873931/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
