I'm back with a GPU.. Qt Creator still not working

Mlibu · 14 Mar 2024, 06:36

@Mlibu Update: I just installed Ubuntu, updated it, and installed qt-framework, qt-framework-6-6-core22, and the qt creator package. Is there something else I should install? Because it is doing the same thing as on Manjaro. I didn't see any other package with 'qt' in it that was related to qt6.

Tink · wrote on 14 Mar 2024, 00:27

build-essential is installed?

jsulm · 16 Mar 2024, 14:32

@Mlibu Which version of Ubuntu? My Ubuntu 20.04 does not provide Qt6 packages. You can simply use Qt Online Installer to install Qt6.

Mlibu · 18 Mar 2024, 07:41

@jsulm I installed the most recent one? It's Ubuntu 23.10. When I go into the application store there is a package qt-framework-6-6-core22 that installs under the snap directory. I have tried to add that manually to the qt creator installed by package and also I tried to add the Qt from the installer. In both cases I get an error like this:

The qmake executable /home/user/Qt/6.6.2/gcc_64/bin/qmake could not be added: "/home/user/Qt/6.6.2/gcc_64/bin/qmake" produced no output: /home/user/Qt/6.6.2/gcc_64/bin/qmake: symbol lookup error: /home/user/Qt/6.6.2/gcc_64/bin/qmake: undefined symbol: _ZN9QtPrivate25QMetaTypeInterfaceWrapperI7QStringE8metaTypeE, version Qt_6

And then it says qmake is not readable.

Also I just got this error in a rogue X11 window that seemed to have come from the Ubuntu packaged Qt Creator:

Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: minimalegl, xcb, wayland-egl, linuxfb, vkkhrdisplay, vnc, wayland, offscreen, minimal, eglfs.

And.. apparently this is a rabbit hole that never ends. I searched on this error and found an old forum post that indicated to run qtcreator with QT_DEBUG_PLUGINS=1. When I did I got a dialog with the following:

The following plugins have errors and cannot be loaded:
QmlProfiler

Plugin initialization failed: Cannot create OpenGL context.

Though when I checked my vid card support it was at OpenGL 4.6

jsulm · 18 Mar 2024, 10:54

@Mlibu I never installed Qt via snap, Ubuntu should still have normal Qt packages to install.

Mlibu · 18 Mar 2024, 12:32

@jsulm I used the package manager application Ubuntu comes with. It doesn't install normal packages?

jsulm · 18 Mar 2024, 14:47

@Mlibu Snap is not the same as "normal" deb packages. Snaps are containers running applications.

Mlibu · 18 Mar 2024, 15:26

@jsulm That's interesting and confusing. At any rate, that doesn't explain why it wasn't working in Manjaro. I was able to access the files in the snap directories and Qt Creator was reading them, it just wasn't liking what it was seeing.

Mlibu · M Mlibu 18 Mar 2024, 14:47

@Mlibu So an update. I was able to build a project by adding /usr/bin/qmake6 (from manjaro package) to a kit and also installing ninja and cmake. However, though creator is not crashing this time the objects still arent drawn properly and there is just a grey background. I'm going to try installing manjaro one more time and doing that.

Mlibu · M Mlibu 13 Mar 2024, 18:23

@Mlibu
Is this error not a problem?

qt.accessibility.atspi: Error in contacting registry: “org.freedesktop.DBus.Error.Disconnected” “Not connected to D-Bus server”

PropertyEditor: invalid node for setup
qtc.imagecontainer.debug: void QmlDesigner::readSharedMemory(qint32, QmlDesigner::ImageContainer&) Not able to create image: 0 0 0
qtc.imagecontainer.debug: void QmlDesigner::readSharedMemory(qint32, QmlDesigner::ImageContainer&) Not able to create image: 0 0 0
PropertyEditor: invalid node for setup
qtc.imagecontainer.debug: void QmlDesigner::readSharedMemory(qint32, QmlDesigner::ImageContainer&) Not able to create image: 0 0 0
QDragManager::drag in possibly invalid state

Tink · 20 Mar 2024, 12:49

Might be useful to see what packages you have installed.

pacman -Q > installed.txt

Mlibu · 20 Mar 2024, 16:53

@Tink That sounds like it may be productive, thank you.

Please click here (Pastebin)

Tink · 20 Mar 2024, 19:16

@Mlibu i have more qt6 packages installed. See if it makes a difference for you if you install the qt6 group.

pacman -S qt6

Oh and this:

pacman -S base-devel

Mlibu · 20 Mar 2024, 21:45

@Tink Thanks but that didn't work. Still doing the same thing.

Ronel_qtmaster · 20 Mar 2024, 22:02

@Mlibu it seems that we have to download the online installer from our qt account before installing it https://doc.qt.io/qt-6/qt-online-installation.html

Mlibu · wrote on 20 Mar 2024, 22:02

@Ronel_qtmaster I have tried it with the installer, with Manjaro package manager and with Ubuntu package manager. If I use the installer it crashes as soon as I use the property pane in the designer screen. Through Manjaro package manager it doesn't crash but the designer 2D screen doesn't draw properly and is useless.

Tink · 21 Mar 2024, 11:56

@Mlibu said in I'm back with a GPU.. Qt Creator still not working:

@Tink Thanks but that didn't work. Still doing the same thing.

Alright you started with no examples and no working default desktop kit, that has resolved itself after many retries right. So now all you have left is the qt.accessibility.atspi: Error in contacting registry: “org.freedesktop.DBus.Error.Disconnected” “Not connected to D-Bus server” problem if that is indeed the cause of the qt designer malfunctioning.

Am i correct that you always tried with kde plasma? I would certainly also try with another lighter desktop environment like the one i'm using, xfce4.

pacman -Sy xfce4
startxfce4

Perhaps even remove plasma.

Mlibu · 21 Mar 2024, 12:40

@Tink I have been told by people using KDE Neon that it works fine. Also I tried Ubuntu with Gnome. I will do as you say and try XFCE. But if this works then what the heck is wrong with KDE and Gnome?

Mlibu · 21 Mar 2024, 13:32

@Mlibu I switched to XFCE and the same thing happened. I couldn't uninstall plasma, there were many interdependent packages. So I am going to install fresh with XFCE and try it.

Tink · 21 Mar 2024, 13:41

@Mlibu said in I'm back with a GPU.. Qt Creator still not working:

@Mlibu I switched to XFCE and the same thing happened. I couldn't uninstall plasma, there were many interdependent packages. So I am going to install fresh with XFCE and try it.

It's probably not going to make any difference but since it's a more minimal environment and there are no other ideas it's worth a try.

However it might be better to forget about qtcreator for now and download the standalone qt design studio community edition. Or did you already try that? https://doc.qt.io/qt-6/install-qt-design-studio.html