With mesa-from-git, I see this messages in VT-1 from where I run startx: Mesa: User error: GL_INVALID_ENUM in CreateShader(type) Mesa: User error: GL_INVALID_VALUE in glShaderSourceARB Mesa: User error: GL_INVALID_VALUE in glCompileShader Mesa: User error: GL_INVALID_VALUE in glGetObjectParameterivARB ###!!! ABORT: X_GLXSwapBuffers: BadMatch (invalid parameter attributes): file ../../../toolkit/xre/nsX11ErrorHandler.cpp, line 190 ###!!! ABORT: X_GLXSwapBuffers: BadMatch (invalid parameter attributes): file ../../../toolkit/xre/nsX11ErrorHandler.cpp, line 190 Last commit: commit fedc5b03db64cbb76d101945017a46c5d27f1bbb Author: Dave Airlie <airlied@xxxxxxxxxx> glx: add ARB_create_context functions/ops to glx xml My autogen-line: $ ./autogen.sh --prefix=/usr --with-driver=dri --with-dri-driverdir=/usr/lib/dri --with-dri-drivers=r200,swrast --disable-gallium --disable-egl --disable-glu --disable-glut --disable-glw --enable-glx-tls --enable-debug I am here on linux-next (next-20110314) and xserver-1.10-rc3. - Sedat - _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel