On Friday 15 January 2016 23:27:50 Kevin Kofler wrote: > Hi Lisandro, [snip] > you just need to install this script: > http://pkgs.fedoraproject.org/cgit/rpms/qt5-qtbase.git/plain/10-qt5-check-op > engl2.sh to: > /etc/X11/xinit/xinitrc.d/10-qt5-check-opengl2.sh > and depend on glx-utils, which provides the glxinfo command the script uses. > > I got the prerequisite environment variable (QT_XCB_FORCE_SOFTWARE_OPENGL) > support added to Qt 5.3: > https://codereview.qt-project.org/#/c/76992/ > It has been in there ever since. (I also mentioned the needed script, but > there was no interest in shipping this with Qt, unfortunately.) This is > checked once at X11 startup because it is fairly expensive to check the > available OpenGL version: You have to spawn an external process and ask Mesa > for information there. If you initialize your own process with hardware > OpenGL, it is too late to request LIBGL_ALWAYS_SOFTWARE.
Excellent! > We have been shipping this solution in Fedora for around 2 years now. And now that you mention it I remember having seen that commit (I'm actually listed as reviewer!) and even warning my team mates about this. The fact that we came to this two years later says a lot about people using old video cards I guess (plus the fact that we introduced KF5 some time later due to Debian Jessie's freeze). > What I have not checked is how this interacts with Wayland. The > glxconvenience code inside Qt where my QT_XCB_FORCE_SOFTWARE_OPENGL variable > is actually implemented may or may not be used there. And xinitrc.d may or > may not be run there. Don't ask me. ACK, I will add this to the script so we get note of it. Thanks a lot! -- 20:57 * m4rgin4l patento el proceso de invencion 20:57 < m4rgin4l> de aqui en mas cualquier inventor me tiene que pagar regalias por inventar algo 20:57 * m4rgin4l tiene la patente pendiente del metodo cientifico Lisandro Damián Nicanor Pérez Meyer http://perezmeyer.com.ar/ http://perezmeyer.blogspot.com/
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