The issue is no longer observed with the latest Intel graphics driver beta version(27.20.100.8581). Fixed in latest release version 27.20.100.8587

@thehans said in QOpenGLWidget::grabFrameBuffer() always ignores alpha channel?:

Unfortunately I'm on Ubuntu 18.04 which is still on 5.9.5.
Is there any chance of this fix being backported to earlier versions?

Qt 5.9 is now in "very strict" update mode, which means in only receives security fixes. It no longer receives bug fixes.

Your options are:

Download and use Qt 5.12 or newer from https://www.qt.io/download-open-source, OR Apply the patch to your copy of Qt 5.9 and build it from source.

I think the first option is easier.

@BoboFuego said in How to make mouseMoveEvent and keyPressEvent to be called interchangeably?:

I don't know how to mark this thread as solved

"Topic Tools" at the bottom right side and then "Mark as Solved".

@Alain38-0 said in Problem with QTest, QGlWidget, and Qt5:

I have found a similar problem in my application

Please provide a Short, Self Contained, Correct (Compilable), Example (http://www.sscce.org/ ). Remove the confidential and unnecessary elements, and give us a compilable example (including a main() function, a simple class, and an output display) that demonstrates the problem. Otherwise, it's difficult to understand the problem.

Also, if you are on Qt 5.4 or newer, I suggest replacing QGLWidget with QOpenGLWidget. QOpenGLWidget resolves numerous issues with QGLWidget: https://blog.qt.io/blog/2014/09/10/qt-weekly-19-qopenglwidget/

Hi,

I may be wrong but based on this, it seems to be an unsupported use case for EGLFS.

Hi,

You connect statement is wrong. It should be:

connect(glwidget, SIGNAL(textChanged(QString)), ui->textEdit, SLOT(setText(QString)));

Never put the variable name in the SIGNAL or SLOT macros

Thank you for your reply.
Yes, that is probably the best to do. It will however require to switch to Qt5.4, and that is a larger endeavour. Will try that.

Thanks again!