[PyQt] Ubuntu, PyQt/Qt 5.9, QOpenGLShaderProgram "is not linked"

[Florian Bruhin]

On Mon, Jul 17, 2017 at 10:06:56AM +0200, Jérôme Laheurte wrote:
> 
> > Le 17 juil. 2017 à 10:04, Jérôme Laheurte <jerome at jeromelaheurte.net> a écrit :
> 
> > Install python-opengl and add something along the line of
> > 
> > if platform.system() == « Linux »:
> >    from OpenGL import GL
> > 
> > See https://github.com/spyder-ide/spyder/issues/3226
> 
> BTW with some versions of the nouveau driver, even after doing this,
> simply showing a QWebEngineView will crash your program very hard. The
> only thing that worked for me then was to use the proprietary NVidia
> driver…

FWIW, here's how you can detect that Nouveau is used:
https://github.com/qutebrowser/qutebrowser/blob/v0.11.0/qutebrowser/utils/version.py#L375-L422
(then check for opengl_vendor() == 'nouveau')

You can make it work by forcing software rendering via:
export QT_XCB_FORCE_SOFTWARE_OPENGL=1

Depending on your hardware, you either won't notice a difference, or it
will be too slow for every-day usage.

Florian

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