qtcreator Issue with QML

[paulj]

Good morning all!
I am playing with qtcreator, but I seem to have some issues which I am sure are connected to system configuration rather than qtcreator directly. When running a simple QML application (from the book "QT Blueprints"), I am getting the following errors:

[paulj]

I have spent a significant amount of time on this issue, and I am finally of the opinion this must be an interaction with nvidia and qt-creator. I am not sure what the issue is though. I have tried the unstable versions of Qt and the git ebuild for qt-creator, without any difference. QML applications (even the basic skeleton created when starting a new project) fail to run inside qt-creator, but run perfectly fine from the command line outside qt-creator. On my laptop (Lenovo X270) with the same level of software but Intel integrated graphics instead of nvidia, everything works as expected. I will now investigate different versions of nvidia-drivers to see if I can pin down the problem further.

If any of you have an nvidia graphics card and are using the latest stable version of qt (5.11.1-r1) with qt-creator-4.6.2, could you please try the following: create a new QML project from the wizard selecting any of the QML templates, then build and run it. Does it seem to run, and do you see any error messages in the Application Output tab?

Many thanks!

[The Main Man]

Did you re-emerge Qt Creator again ?
You probably did but you mentioned just libraries.

I don't have Nvidia but I had something similar, after the upgrade of some QT libs I didn't re-emerge qt-creator, when I did problems were gone.

[paulj]

[paulj]

Here is the output of "ldconfig -p | grep libGL":

[paulj]

A bit more information. I ran "export LD_DEBUG=files", and collected the stderr output.

Here is the output from opening and closing qtcreator, filtered for libGL:

[mir3x]

I dont use 4.6.2 from gentoo bc it doenst show me eg. examples at all - no idea where they came from, I just use directly from qt mainentance.

I tested from 4.8.0 advancedcustommaterial and it works perfectly.
Only warning is: QML debugging is enabled. Only use this in a safe environment.

I think u messed xorg configuration or forgot to use:
eselect opengl set nvidia ( as root, I guess u have nvidia there).

Are your opengl apps using hardware accelaration?
Check if u didnt set "minimal" flag to xorg-server also, I think opengl doesnt work with it.
_________________
Sent from Windows

[paulj]

[mir3x]

I use QtCreator only for browsing examples exactly, normally I use KDevelop.
You need to make account on qt website and download something called Qt Maintenance Tool.
Qt creator should detect your existing qt, but for examples you will need probably choose 1 version ( Im not 100% sure, because I have like 5 qt versions installed by that utility - just to check if everything is good with qt5.2 and 5.5 or other versions).
Qt servers are quite slow, depending on time of day - overall it installs everything in directory you point, no need root for it, its easy to remove, no systems dirs overwritten.
For me it also spams message that "is probably corrupted" and recommend reinstalling - for at least 1 year, but I just ignore it ... everything works
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Sent from Windows

[mir3x]

I installed qt-creator from gentoo, there was no examples.

I used new project and I got those errors:
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
Unrecognized OpenGL version
Unrecognized OpenGL version
QGLXContext: Failed to create dummy context
Unrecognized OpenGL version
Unrecognized OpenGL version

SO I guess something wrong there is, mb some environments variables must be set to work.
Easier is just to get qt from web probably than fixing.
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Sent from Windows

[paulj]

mir3x - thanks for taking the time to check out the portage version - it's good to see the problem I have is reproducible elsewhere! I will have a go at setting the environment inside qt-creator to see if I can get around this problem that way.
I will also install the version of qt-creator outside of portage and see how that behaves, then I will raise a bug for the behaviour above if that seems appropriate.

[asturm]

qtcreator-4.8.0 is now in tree.

[paulj]

[The Main Man]

[asturm]

USE=-clang, probably?

[paulj]

qt-creator-4.8.0 exhibits the same issues as 4.6.2. Interestingly following the comment from kajzer I have installed kdevelop, and this works as expected. I still haven't tried an out of tree version to see if the problem is Gentoo ebuild related or not. I will do this over the next few days (Christmas may get in the way...!! )

[The Main Man]

[asturm]

I could only guess here as well, it may as well have been hidden indirectly behind one of the other dependencies. I'm not using qt-creator nor did I work on the ebuild.

[The Main Man]

You were right, I didn't have time to check new USE flags.

Anyway, IMHO clang USE flag shouldn't be turned on by default