| Summary: | phonon4qt5-backend-vlc is marked as a dependency of Plasma, so trying to remove VLC removes Plasma and breaks your desktop | ||
|---|---|---|---|
| Product: | [KDE Neon] neon | Reporter: | Stuart K. Smith <stuartksmith> |
| Component: | general | Assignee: | Neon Bugs <neon-bugs> |
| Status: | RESOLVED FIXED | ||
| Severity: | critical | CC: | charles.v.wright, emailmeat, gabriellasarosaleze, greygeek77, jr, nate, neon-bugs, sitter |
| Priority: | VHI | ||
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Platform: | Neon | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
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Description
Stuart K. Smith
2017-05-11 11:39:05 UTC
I am running a fully updated Neon User Edition. As Oshunluver says: :~$ apt-cache depends phonon4qt5-backend-vlc phonon4qt5-backend-vlc Depends: vlc Depends: libc6 Depends: libphonon4qt5-4 Depends: libqt5core5a Depends: libqt5gui5 Depends: libqt5widgets5 Depends: libstdc++6 Depends: libvlc5 Depends: libvlccore8 Depends: phonon4qt5 :~$ apt-cache rdepends phonon4qt5 phonon4qt5 Reverse Depends: plasma-workspace plasma-desktop phonon4qt5-backend-vlc phonon4qt5-backend-gstreamer okular marble-plugins libphonon4qt5-dev libokular5core7 libmarblewidget-qt5-27 libkf5notifyconfig5 libkf5notifications5 libkf5mailcommon5 libkf5khtml5 libkf5compactdisc5 kwordquiz ktuberling korganizer konversation konversation konversation klettres kio-extras kalarm gwenview dragonplayer dolphin calligrastage calligrastage calligra-libs calligra-libs blinken libphonon4qt5-dev And there goes the desktop. confirming @hear vinny@vinny-Bonobo-Extreme:~$ lsb_release -a No LSB modules are available. Distributor ID: neon Description: KDE neon LTS User Edition 5.8 Release: 16.04 Codename: xenial vinny@vinny-Bonobo-Extreme:~$ sudo apt-get -s remove --purge vlc <snip> The following additional packages will be installed: gstreamer1.0-pulseaudio libutempter0 phonon-backend-gstreamer phonon-backend-gstreamer-common xterm Suggested packages: gstreamer1.0-plugins-ugly phonon4qt5-backend-gstreamer xfonts-cyrillic The following packages will be REMOVED: bluedevil* dolphin* frameworkintegration* gwenview* kaccounts-providers* kde-cli-tools* kde-config-gtk-style* kde-config-screenlocker* kde-spectacle* kdeconnect* kdialog* kgamma5* khotkeys* kinfocenter* kio* kio-extras* kmenuedit* konsole* konsole-kpart* krusader* kscreen* ksshaskpass* ksysguard* kwalletmanager* kwin* kwin-addons* kwin-common* kwin-data* kwin-x11* kwrited* libkf5kdelibs4support5* libkf5kdelibs4support5-bin* libkf5khtml-bin* libkf5khtml5* libkf5newstuff5* libkf5newstuffcore5* libkf5notifications5* libkf5notifyconfig5* libkf5plasma5* libkf5plasmaquick5* libkf5purpose5* libkf5purposewidgets5* libkf5runner5* libkf5wallet-bin* libkf5wallet5* libkscreenlocker5* libkwalletbackend5-5* libkwin4-effect-builtins1* libokular5core7* libpowerdevilcore2* libweather-ion7* milou* muon-notifier* muon-updater* neon-desktop* okular* phonon-backend-vlc* phonon4qt5* phonon4qt5-backend-vlc* plasma-dataengines-addons* plasma-desktop* plasma-discover* plasma-discover-private* plasma-discover-updater* plasma-framework* plasma-integration* plasma-nm* plasma-pa* plasma-runners-addons* plasma-wallpapers-addons* plasma-widgets-addons* plasma-workspace* powerdevil* print-manager* qml-module-org-kde-kirigami* qml-module-org-kde-newstuff* qml-module-org-kde-purpose* qml-module-org-kde-runnermodel* sddm-theme-breeze* systemsettings* user-manager* vlc* The following NEW packages will be installed: gstreamer1.0-pulseaudio libutempter0 phonon-backend-gstreamer phonon-backend-gstreamer-common xterm 0 upgraded, 5 newly installed, 82 to remove and 0 not upgraded. <snip> it seams as though apt will add the missing phonon-backend-gstreamer ,,,, But still removes your desktop . VINNY Much KDE software depends on Phonon which needs one of its backends installed to function. If you remove that it's entirely reasonable that apt wants to remove the software that needs it. (In reply to Jonathan Riddell from comment #3) > Much KDE software depends on Phonon which needs one of its backends > installed to function. If you remove that it's entirely reasonable that apt > wants to remove the software that needs it. I completely understand and agree, but I don't see this as the central issue. The problem as I see it is the lack of a fail-back to the gstreamer backend in the event the user wants to remove VLC. As it stands, removing VLC is impossible unless the user knows to install the gstreamer backend prior to attempting the removal. This requirement is not obvious to the uninitiated and is not apparent by the error messages created by the attempt. IMO, this situation could be easily resolved in one of these ways: 1) The removal of phonon4qt5-backend-vlc triggers the installation of phonon4qt5-backend-gstreamer - and vice-versa, thus preventing the unintentional breakage of the entire system. 2) Both backends installed by default, thus allowing VLC to be removed without incident. 3) VLC not be installed by default at all, instead having gtreamer be the default backend. Again, IMO #1 would be the most beneficial as it provides protection from "silly user tricks." Interesting points to note: **Removing the gstreamer backend (whilst the VLC backend is not present) automatically installs the VLC backend. It's only when you attempt the reverse as stated above that the removal of KDE is at risk. **Even VLC does not have the VLC backend as a dependency. Removing the VLC backend on it's own does not force the removal of VLC. Does solution #1 from comment #4 work on a regular Kubuntu installation? This solution seems natural, and it is solved in openSUSE by using a virtual -backend package, that can be satisfied by either -vlc or -streamer backends. *** Bug 380513 has been marked as a duplicate of this bug. *** Two days ago I was able to remove VLC, and KDE Neon automatically fixed it. Today on a clean install from a fresh downloaded ISO, it attempted to remove Plasma and all default programs as reported in this issue. The workaround of manually installing phonon4qt5-backend-gstreamer before removing VLC worked. Not sure this bug should be marked RESOLVED INVALID. It seems that from a normal user perspective, the issue persists. Can we investigate substituting the gstreamer backend when the phonon backend is requested to be removed? It's really not a great user experience to have your system blown up when you uninstall a common and popular piece of software like VLC. It was invalid because vlc's debian packaging was rubbish which is why the package relationships were as awkward as they were. It's now a valid bug because on 18.04 the vlc packaging is better but our backend packaging is rubbish. Will be fixed in user edition soon and is already fixed in dev editions. |