i have tested the proposed package and it works (on ubuntu-MATE 17.10 clean install)
on a clean install of ubuntu-MATE 17.10 (iso from october 2017) , then the usual standard sudo apt update, sudo apt upgrade... then checking the setting in "pre-released updates" in developers options in software & updates... then running sudo apt update, sudo apt upgrade to get the proposed updates, then running the sudo do-release-upgrade -d the upgrade to bionic beaver 18.04 works... the upgrade to bionic beaver 18.04 (ubuntu-MATE) will not work if you do not apply the updates in the to the bionic-proposed.. in short, if you are Upgrading ubuntu-MATE from 17.10 to 18.04 you need the bionic-proposed updates... otherwise the update will not work. IMO it is fixed with the bionic-proposed. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1750465 Title: upgrade attempting to process triggers out of order (package plymouth- theme-ubuntu-text 0.9.2-3ubuntu17 failed to install/upgrade: dependency problems - leaving triggers unprocessed) Status in apt package in Ubuntu: Confirmed Status in budgie-artwork package in Ubuntu: Fix Released Status in kubuntu-settings package in Ubuntu: Confirmed Status in plymouth package in Ubuntu: Fix Released Status in ubuntu-gnome-default-settings package in Ubuntu: Confirmed Status in ubuntu-mate-artwork package in Ubuntu: Confirmed Status in apt source package in Xenial: Confirmed Status in budgie-artwork source package in Xenial: Confirmed Status in kubuntu-settings source package in Xenial: Confirmed Status in plymouth source package in Xenial: Fix Committed Status in ubuntu-gnome-default-settings source package in Xenial: Confirmed Status in ubuntu-mate-artwork source package in Xenial: Confirmed Status in apt source package in Artful: Confirmed Status in budgie-artwork source package in Artful: Confirmed Status in kubuntu-settings source package in Artful: Confirmed Status in plymouth source package in Artful: Fix Committed Status in ubuntu-gnome-default-settings source package in Artful: Confirmed Status in ubuntu-mate-artwork source package in Artful: Confirmed Bug description: [SRU Justification] A package manager bug can cause dist-upgrades from 17.10 to 18.04 to fail because of trying to process triggers out of order. Since the trigger being run is that of the currently-installed plymouth package, it is not guaranteed to be sufficient to fix the version of the package in 18.04. [Test case] 1. Install plymouth-themes-ubuntu-text from artful-proposed. 2. Run a release upgrade with each of update-manager -d, do-release-upgrade -d, and apt-get dist-upgrade (the last after manually changing sources.list). 3. Verify that in each case, the upgrade completes successfully, with no errors about out-of-order trigger configuration. [Regression potential] noawait triggers have been supported in dpkg since 1.16.1, which is older than the version in precise (https://manpages.debian.org/jessie/dpkg-dev/deb-triggers.5.en.html). A noawait trigger is considered appropriate whenever the triggered package does not need to block the triggering package. There is no reason for a plymouth theme package to need to block configuration of an essential package in this case. noawait triggers are well-exercised in the distro now, so the risk of regression from this change should be low. There is unfortunately not a known reproducer for the original bug, so the test case, while it should guard against regressions, is not strong confirmation that the bug is fixed. [Original description] Failure during upgrade attempt from Xubuntu 17.10 to Xubuntu 18.04 ProblemType: Package DistroRelease: Ubuntu 18.04 Package: plymouth-theme-ubuntu-text 0.9.2-3ubuntu17 ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13 Uname: Linux 4.13.0-32-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 Date: Sun Feb 18 23:41:49 2018 DefaultPlymouth: /usr/share/plymouth/themes/xubuntu-logo/xubuntu-logo.plymouth ErrorMessage: dependency problems - leaving triggers unprocessed InstallationDate: Installed on 2017-10-24 (118 days ago) InstallationMedia: Xubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 8087:0a2a Intel Corp. Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller Bus 001 Device 002: ID 1bcf:2c01 Sunplus Innovation Technology Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. Inspiron 5567 ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic.efi.signed root=UUID=d2256612-d86a-469b-be01-94e1fdcca333 ro quiet splash vt.handoff=1 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic.efi.signed root=UUID=d2256612-d86a-469b-be01-94e1fdcca333 ro quiet splash vt.handoff=1 Python3Details: /usr/bin/python3.6, Python 3.6.4+, python3-minimal, 3.6.4-1 PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4 RelatedPackageVersions: dpkg 1.19.0.5ubuntu1 apt 1.5.1 SourcePackage: plymouth TextPlymouth: /usr/share/plymouth/themes/xubuntu-text/xubuntu-text.plymouth Title: package plymouth-theme-ubuntu-text 0.9.2-3ubuntu17 failed to install/upgrade: dependency problems - leaving triggers unprocessed UpgradeStatus: Upgraded to bionic on 2018-02-19 (0 days ago) dmi.bios.date: 01/12/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.1.0 dmi.board.name: 01W6F7 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.1.0:bd01/12/2017:svnDellInc.:pnInspiron5567:pvr:rvnDellInc.:rn01W6F7:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: Inspiron dmi.product.name: Inspiron 5567 dmi.sys.vendor: Dell Inc. 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