On Mon, 2014-09-01 at 12:09 +0100, Steven Newbury wrote: > I tried building the xorg intel ddx driver with only DRI3 support, > with DRI1 and DRI2 disabled. > > glxinfo says direct rendering is enabled, but gives no core > contexts*. > > gnome-shell appears to be using software fallback, generally there > seems to be no hardware acceleration. I'm wondering if DRI3 isn't > ever initialising successfully, and now there's no DRI2 to fall back > to. > > What is the minimal kernel version for DRI3? I'm currently stuck on > the 3.14 stable series due to an unresolved kernel bug (which I need > to bisect...), is it too old? > > I remember before the intel (SNA) support landed LIBGL_DEBUG=verbose > used to mention DRI3 failing, I see nothing mentioning DRI3 at all > now. Is there some way of determining which DRI extension is in use? > DRI3 is properly listed in xdpyinfo. > > > * I also get no core contexts also with xwayland/glx, related? As a follow-up, I think this is related to https://bugs.freedesktop.org/show_bug.cgi?id=85064 Something tells me DRI3 isn't really working with i965. This is largely going unnoticed since when DRI2 is available it's usually used instead. webkit-gtk is not falling back to DRI2 without DRI3 being specifically disabled with LIBGL_DRI3_DISABLE=1.
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