Hi everyone, I ran apt full-upgrade last month and accidentally deleted a couple packages that weren’t supposed to be removed, due to me not paying enough attention. I could recover most of the system just fine, since most of the missing features and related packages were obvious to me. However, I still couldn’t figure out why transparency is not working on KDE, both in Wayland and X. I suspected it could be a missing compositor, but libwayland and libqt6waylandcompositor6 (and related packages) are all installed (and that wouldn’t explain why it isn’t also working on X).

I have attached a screenshot to illustrate what I mean.

I would appreciate if anyone could help me figure out what package might be missing that is causing this issue. Thanks in advance!

EDIT: Thank you so much everyone! I finally solved my problem. I just had to replace libqt5quick5-gles by libqt5quick5 (non gles version).

Commandline: apt install libqt5quick5
Install: libqt5quick5:amd64 (5.15.10+dfsg-2+b2)
Remove: libqt5quick5-gles:amd64 (5.15.10+dfsg-2+b2)
  • kyoji@lemmy.world
    1·
    8 months ago

    Are you on BTRFS? If so maybe you could restore to a snapshot prior to the apt upgrade?

    I’m not very familiar with Debian, but perhaps there are official “groups” of packages that comprise a set of softwares, like KDE. Perhaps you could re-install that group, if it exists?

    You could also create a new user, log in as that user, and see if the issue persists. If so then you’ll know it’s a system wide issue. If not, then maybe you could migrate to the new user?

    Good luck!

    • buffy@lemmy.worldOP
      1·
      8 months ago

      Sadly I am not using BTRFS for my root directory on this specific system. If I end up deciding to reinstall, I will definitely go back to BTRFS to avoid such problems.

      Debian actually has a KDE group named kde-full. I reinstalled it but the issue persists, which was honestly surprising to me.

      ~$ sudo apt install kde-full
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
kde-full is already the newest version (5:147).
0 upgraded, 0 newly installed, 0 to remove and 87 not upgraded.

      The new user idea was really clever, thanks for the suggestion! I will try that now and see.

      Edit: the new user also presents the same problem. Actually, it makes sense, since SDDM is affected as well (I should have mentioned that before).

      • Ephera@lemmy.ml
        1·
        8 months ago

        Debian doesn’t have package groups in that sense. kde-full is just a package which depends on the other KDE packages.
        So, if you tell it to install kde-full, it’ll just check that, yes, it does have the kde-full package installed, whether all the dependencies are fulfilled or not.

        You can try doing apt --fix-broken install (without specifying a package), maybe that will pull in the missing dependency.
        Or you can reinstall: apt reinstall kde-full

        • buffy@lemmy.worldOP
          1·
          8 months ago

          Thanks for the tip! However, I tried apt reinstall kde-full and apt --fix-broken install, but no packages were installed and (unsurprisingly) the problem still persists.

          • Ephera@lemmy.ml
            0·
            8 months ago

            Hmm, then I’m guessing, it’s not a missing package. It kind of doesn’t quite make sense anyways, as KDE Wayland can’t be run without a compositor.

            Maybe the installed Breeze theme is broken. If you install a different Plasma theme in the System Settings, does that give you transparency?

            • buffy@lemmy.worldOP
              0·
              8 months ago

              I agree with that. I suspect you might be right. SDDM (Breeze) is also weird with transparency. However, I just installed materia-kde but unfortunately the problem persisted (screenshot attached). Before that, I ran apt purge kde* plasma* libkf* and apt install kde-full. That too didn’t solve my problem.

  • lurch (he/him)@sh.itjust.works
    1·
    8 months ago

    if you don’t have any backups (like normal people do), check the logs of the package manager. for example /var/log/apt/history.log should have a neat list of operations with timestamps and packages.

    • Raspin@lemmy.ml
      0·
      8 months ago

      Most people don’t really get out their way to set up backup manually. Either system should try really hard to avoid corruption or implement a recovery system. Ideally both.

      • Ephera@lemmy.ml
        1·
        8 months ago

        Well, the Linux world is moving towards btrfs and zero-setup automatic snapshots. Those would have made it trivial to rollback a broken update like that. Unfortunaly, it’s still going to take a few years before Debian makes the move…

        • jack@monero.town
          01·
          8 months ago

          Unfortunaly, it’s still going to take a few years before Debian makes the move…

          Debian is as traditional as it gets, change comes slooowly. I don’t see why it’s still so popular

  • communism@lemmy.ml
    1·
    8 months ago

    How did you install KDE in the first place? If you uninstalled too many packages for the logs to be of use, just reinstall KDE however you installed it