Using simple test apps (lp:~gerboland/+junk/openglwindow & lp:~gerboland/+junk/qquickwindow-debug), it appears that yes Qt is using OpenGL 1.4 on X for both raw GL and QtQuick apps.
./qquickwindow-debug Window format: QSurfaceFormat(version 2.0, options QFlags(), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples -1, swapBehavior 2, swapInterval 1, profile 0) Context format: QSurfaceFormat(version 1.4, options QFlags(0x4), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples -1, swapBehavior 2, swapInterval 1, profile 0) GLES: false The "Context format: ... version 1.4" the thing to look for. The EGL backend for Qt (X uses the GLX backend) is requiring OpenGl2 or greater (since that is what the Window is asking for), but the GLX backend seems to ignore that request, and just work. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1549455 Title: Unity8-dash on Intel Atom graphics crashes and restarts continuously [qtubuntu: ASSERT: "eglDestroyContext(mEglDisplay, EglContext) == EGL_TRUE"] To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1549455/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
