Not sure if this is going to help but I did notice with pd-l2ork on a laptop with an AMD video card (fglrx driver) when I have the tearfree (vsync) option enabled pd-l2ork's gui gets very sluggish. Disabling the vsync option makes it fine. On Feb 24, 2013 3:54 PM, "Fons Adriaensen" &lt;fons(a)linuxaudio.org&gt; wrote: Hello all, I'm seeing a strange probelm with Pd. I'm testing a very simple patch (total CPU load < 1.5% with DSP enabled). There are a few message boxes used to set a hslider to some preset values. With DSP enabled they take something like a second to respond to a click. What's wrong here ? Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev