Package: xserver-common Version: 4.3.0.dfsg.1-12.0.1 The dexconf utility generates X config files that contain a Load "GLcore" statement in the Module section. This is (and as far as I know always has been) superfluous, because the glx module will load GLcore automatically. Currently this can lead to a warning in the X log saying GLcore failed to load the second time, as being a once-only module. Harmless but annoying.
In the future the server's glx component will be reworked to load DRI drivers, in which case Load "GLcore" will be even more wrong. The error message in this case will say that the GLcore module can't be found. - ajax
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