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    Discover fails to update ... again

    I used the terminal, and it updated just fine. It seems today's update gives Discover problems. For some reason, Discover thinks there are a bunch of unmet dependencies, but the terminal had no issues and only had to update one file, as it is just a codec update, so the dependencies are already on my system. I have seen this several times over the past several versions of Kubuntu and on several computers, but the terminal can update just fine. Is there something strange about the way Kubuntu looks for dependencies, or maybe it's a KDE and or plasma thing that just affects Discover once in a while?
    Just to remind users and devs that Ubuntu and its flavors have a long way to go to be as usr friendly as they should be.

    http://www.kubuntu.org/getkubuntu

    #2
    Discover IS NOT a package manager. It doesn't do everything that apt does. Relying on it as a package manager is a fools errand.
    Windows no longer obstruct my view.
    Using Kubuntu Linux since March 23, 2007.
    "It is a capital mistake to theorize before one has data." - Sherlock Holmes

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      #3
      Originally posted by Snowhog View Post
      Discover IS NOT a package manager. It doesn't do everything that apt does. Relying on it as a package manager is a fools errand.
      So I should not use its update utility? I will just use the terminal from now on and use Discover to read what is in the updates.
      Just to remind users and devs that Ubuntu and its flavors have a long way to go to be as usr friendly as they should be.

      http://www.kubuntu.org/getkubuntu

      Comment


        #4
        Originally posted by steve7233 View Post
        So I should not use its update utility?
        "I" would so 'no'; do all your package management from the command line:

        sudo apt update
        sudo apt full-upgrade

        Any updates that Discover notifies about, apt will see as well.

        When Muon Package Manager was finally laid to rest, an actual Package Manager was no longer being included in the distribution ISOs for Kubuntu (to the best of my knowledge). Many of us, after installing Kubuntu, will install Synaptic Package Manager.
        Windows no longer obstruct my view.
        Using Kubuntu Linux since March 23, 2007.
        "It is a capital mistake to theorize before one has data." - Sherlock Holmes

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          #5
          I use Discover to install updates daily, whenever I see a notification actually. I usually start my day checking for updates on the command line, but if Discover has beaten me to it, I will use that, since it also updates my flatpaks and KDE theme items. I have had absolutely zero issues in the past year doing this on both my PC and travel laptop that were related to Discover, though my 24.04 drive died fairly recently and I haven't bothered to replace it, so this is mostly on the current Plasma 6 releases.

          Dependency errors in Discover ARE errors from apt at the time you refreshed and updated. Sometimes the issue is fleeting -- a local Ubuntu apt mirror or a PPA is still updating or lagging behind for a bit, things like that keeping things out of sync momentarily.

          Discover, Synaptic, and Muon all use Apt under the hood, and these errors are what apt is reporting.

          Seeing a error in the GUI does warrant checking with apt, for sure.


          tl;dr: I, as a two decade long Kubuntu user who greatly prefers to use the command line for most package management tasks, do support and recommend using discover for installing updates if one desires, and for its use as an app store.

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            #6
            I use a terminal with:
            Sudo apt update && sudo apt upgrade
            What is the difference between upgrade and full-upgrade?
            Just to remind users and devs that Ubuntu and its flavors have a long way to go to be as usr friendly as they should be.

            http://www.kubuntu.org/getkubuntu

            Comment


              #7
              As a reference:
              https://manpages.ubuntu.com/manpages...an8/apt.8.html
              See the tl;dr since I made this too long.



              Basically, apt upgrade is the proper method for most people, despite what us old timers may say.
              As the man page states, apt full-upgrade allows for package removals, if necessary, while apt upgrade does not.
              Normal installations are fine using upgrade since the system is built around this and won't need to have something removed/replaced, but anyone playing around with addon repos that provide significant upgrades might want to remove something, to replace it with something else. Say the Kubuntu-backports PPA on a non-LTS release, or running a pre-release version of *buntu. Or Debian Experimental. KDE neon requires it.

              Even users of PPAs *should* be OK to use plain upgrade, but you never know.
              If some major upgrade of a package from a PPA required a removal, using upgrade will just skip installing or upgrading that thing altogether, and probably not provide an error or warning as it is doing what it is supposed to do. But in the long run this could cause some things to break down the road on modified systems.

              On the other hand, running full-upgrade and a packaging glitch or similar problem might cause important things to get removed if one does not pay attention. This shouldn't happen with regular upgrade so it is safer.

              But, using full-upgrade is safe and won't do anything to a generic more vanilla install either, at least in theory.

              In the now fairly distant past past, apt acted very differently, and Ubuntu's usage required the use of full-upgrade, while Debian used regular upgrade.
              Debian changed how apt worked, and now in most cases upgrade is preferred.

              tl;dr
              Just use apt upgrade
              If one is torn and has added PPAs that provide large amounts of upgraded packages:
              just use full-upgrade and don't worry or think about it too much but always inspect what apt suggest to remove.

              clear as mud
              Last edited by claydoh; Jun 04, 2025, 03:43 AM.

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                #8
                Yep, clear as mud!
                Just to remind users and devs that Ubuntu and its flavors have a long way to go to be as usr friendly as they should be.

                http://www.kubuntu.org/getkubuntu

                Comment


                  #9
                  Yep, that's why I go for "full-upgrade". It does no harm, and may do some good. But, your choice - this is Linux after all.
                  The next brick house on the left
                  Intel i7 11th Gen | 16GB | 1TB | KDE Plasma 5.27.11​| Kubuntu 24.04 | 6.8.0-31-generic



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