it appears to be video h/w + driver related, not ardour related. but hard
to say.
On Fri, May 3, 2013 at 5:31 PM, Fons Adriaensen <fons(a)linuxaudio.org> wrote:
  On Fri, May 03, 2013 at 05:18:03PM -0400, Paul Davis
wrote:
  On Fri, May 3, 2013 at 5:14 PM, Fons Adriaensen
<fons(a)linuxaudio.org> 
 wrote:
 The second one is an Ardour2 session that worked perfectly
 on another similar PC, but becomes completely unresponsive
 on the one to be used. It has four mono tracks and three
 10-channel ones, and little else. DSP load is not the problem,
 it's less than 15%. Things look like it's the graphics.
 
 This follows reports we've seen on IRC many/several times, with no
 particular combination of video h/w and drivers identified. 
 
 Could this be related to reading peak files (which I assume will
 happen when the editor display is updated) ?
 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)