package plasma-workspace (not installed) failed to install/upgrade: trying to overwrite '/usr/share/xsessions/plasma.desktop', which is also in package lubuntu-extra-sessions 0.47

[Tim Merrison]

Reported on first use of LXQt on Ubuntu 16.10, after following instructions on Lubuntu/LXQt wiki.

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: plasma-workspace (not installed)
ProcVersionSignature: Ubuntu 4.8.0-17.19-generic 4.8.0-rc7
Uname: Linux 4.8.0-17-generic x86_64
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
Date: Thu Sep 29 18:55:48 2016
ErrorMessage: trying to overwrite '/usr/share/xsessions/plasma.desktop', which is also in package lubuntu-extra-sessions 0.47
InstallationDate: Installed on 2016-09-29 (0 days ago)
InstallationMedia: Ubuntu-Server 16.10 "Yakkety Yak" - Alpha amd64 (20160929)
RelatedPackageVersions:
 dpkg 1.18.10ubuntu1
 apt 1.3
SourcePackage: plasma-workspace
Title: package plasma-workspace (not installed) failed to install/upgrade: trying to overwrite '/usr/share/xsessions/plasma.desktop', which is also in package lubuntu-extra-sessions 0.47
UpgradeStatus: No upgrade log present (probably fresh install)

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

This bugs needs to be assingned to lubuntu-qt-desktop – ... (PPA?)

[Lyn Perrine (walterorlin)]

Ok I think this is because the lubuntu-qt-desktop package pulls in sddm-theme-breeze which in turn pulls in other kde dependency like plasma-workspace which then cause a conflict with something in lubuntu-qt-desktop. I don't know quite that much debian packaging but my instinct wonders if lubuntu-qt-desktop added a conflicts with sddm-theme-breeze if this error with installs would not happen. Or maybe change the wiki to install a different sddm theme and sddm first.

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

SDDM 0.14 comes with a preinstalled theme, to tackle such situations.

(see bug 1627340 – title:[request upgrade] SDDM)

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.

This particular bug has already been reported and is a duplicate of bug 1508619, so it is being marked as such.

Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report.

Feel free to continue to report any other bugs you may find.