Can't start plasma after installing kdenlive

Help
1

Hey!
I recently installed kubuntu on my machine and after installing kdenlive from Appimage yesterday I can’t get past login screen and has a black screen and only a cursor.
After switching to a another TTY session I’ve discovered this error message in my .xsession-erros:

qt.qpa.plugin: could not load the qt platform plugin “xcb” in “” even though it was found.

I’ve tried every solution I could find on the internet so I can’t remember all of them, but here are some I’ve already tried:
Reinstalling plasmashell
Deleting all configuration files
Install cursor0
Starting plasma from another tty session

Something worth mentioning is that plasmashell is eating my RAM while in this error state so much that after 20 minutes I don’t have any left(and I have 16G).

Would love some help as I really need my computer to function again fast.

Thanks you :pray:

2

Hi - typically the idea of an AppImage is that it merely needs to be downloaded and then executed. You mentioned “installing” Kdenlive here - can you please describe the procedure you used to do that?

3

You are right - I did execute it and not install it.
Just mistyped the term.

4

Just double-checking - are you able to locate the link from which you downloaded the Kdenlive AppImage? Did you perform any other package installations or configuration changes at the same time to get it to work?

5

Hey!
Sorry for the late reply, apparently this forum doesn’t send an email whenever someone replies. or did I miss the option? nevermind.

I downloaded the AppImage from this (kdenlive(dot)org/en/download/) link and I downloaded the latest version.
I did not perform anything else, only executed the AppImage.

Thank you for all the help!

6

Hmm, since the AppImage download location was good/not malicious, then there must have been some change - either a system update, or configuration change (even if not one that you intentionally made) - that happened right around that same time that’s throwing things off.

It was a good idea to look for error logs - the qt.qpa.plugin one led me to look at this page: Kubuntu 20.04 plasma desktop does not start after login - Ask Ubuntu where some possible solutions come up, including removing a specific configuration file (~/.config/plasma-org.kde.plasma.desktop-appletsrc) that could get into a state where it causes problems. You mentioned, though, that you had already “[deleted] all configuration files” - what command did you execute to do that?

7

It didn’t work :frowning:
I deleted all all config files related to plasma from .config and .local, I don’t remember the exact command I used but backed up everything before I deleted so this is the list of files deleted:

.
├── .config
│   ├── kdeconnect
│   │   ├── 0fcd9311_fc31_410c_bf34_6e3ad9d24b03
│   │   │   ├── kdeconnect_clipboard
│   │   │   └── kdeconnect_runcommand
│   │   ├── certificate.pem
│   │   ├── config
│   │   ├── privateKey.pem
│   │   └── trusted_devices
│   ├── kded5rc
│   ├── kdedefaults
│   │   ├── kcminputrc
│   │   ├── kdeglobals
│   │   ├── kscreenlockerrc
│   │   ├── ksplashrc
│   │   ├── kwinrc
│   │   ├── package
│   │   └── plasmarc
│   ├── kdeglobals
│   ├── kdenlive-appimagerc
│   ├── kdenlive-layoutsrc
│   ├── kde.org
│   │   ├── plasmashell.conf
│   │   ├── UserFeedback.org.kde.discover.conf
│   │   ├── UserFeedback.org.kde.dolphin.conf
│   │   ├── UserFeedback.org.kde.kate.conf
│   │   └── UserFeedback.org.kde.plasmashell.conf
│   ├── kwinrc
│   ├── kwinrulesrc
│   ├── plasma-localerc
│   ├── plasmanotifyrc
│   ├── plasma-org.kde.plasma.desktop-appletsrc
│   ├── plasmaparc
│   ├── plasmashellrc
│   ├── plasma-welcomerc
│   ├── plasmawindowed-appletsrc
│   ├── plasmawindowedrc
│   ├── plasma-workspace
│   │   ├── env
│   │   └── shutdown
│   ├── session
│   │   └── kwin_saved at previous logout_
│   └── xdg-desktop-portal-kderc
├── .gtkrc-2.0
├── .local
│   └── kded5
│       └── keyboard
│           └── session
│               └── layout_memory.xml

I hope this helps.
Any other ideas?

8

What if you restore all of those except for ~/.config/plasma-org.kde.plasma.desktop-appletsrc?