this post was submitted on 25 Mar 2024
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Accidentally uninstalled an important package in Debian Sid with KDE, transparency no longer working (lemmy.world)
submitted 8 months ago* (last edited 7 months ago) by buffy@lemmy.world to c/linux@lemmy.ml
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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)
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[–] kyoji@lemmy.world 13 points 8 months ago (1 children)

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.world 12 points 8 months ago* (last edited 8 months ago) (3 children)

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 5 points 8 months ago (1 children)

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.world 2 points 8 months ago (1 children)

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 2 points 8 months ago (1 children)

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.world 1 points 8 months ago (1 children)

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.

[–] Ephera@lemmy.ml 3 points 8 months ago (1 children)

I can't believe, I seem to be the first to ask this, but are maybe graphics drivers broken? Are you on Nvidia?

Those black squares for the status bar icons, I think, I've seen before somewhere, so I'm at least guessing that your problem isn't a completely new problem...

[–] buffy@lemmy.world 4 points 7 months ago* (last edited 7 months ago) (1 children)

You are right, I should have made this clear. I am not on Nvidia, I am using an old Thinkpad on Intel Haswell.

I'm glad to know my problem isn't completely new. I'll look into it further online. If you ever find a link to a report of a similar issue, I would be happy to see!

Edit: I found this link, the issue reported appears to be very similar to what I'm seeing here https://libreddit.tux.pizza/r/kde/comments/jhqbnz/kde_plasma_rendering_problem_black_squares/

Edit 2: I finally solved my problem! It was indeed an old problem already reported somewhere.

[–] Ephera@lemmy.ml 3 points 7 months ago

Awesome!

[–] Pantherina@feddit.de 4 points 8 months ago (1 children)

You will also need to use snapper before every apt-get upgrade to avoid these issues

[–] buffy@lemmy.world 2 points 8 months ago

Thanks for the recommendation! I will definitely do it when I eventually install some other distro in the future.

[–] billgamesh@lemmy.ml 2 points 8 months ago (1 children)

you installed it without uninstalling first? have you tried an apt purge to get rid of related conf files, then reinstall kde?

[–] buffy@lemmy.world 1 points 8 months ago

You are absolutely right. I just tried apt purge kde* plasma* libkf* and apt install kde-full followed by a reboot. But sadly, the problem persists.