On Fri, 15 Jun 2012 20:47:02 -0700 (PDT), Catherine wrote in message 
<1339818422.43212.yahoomailclas...@web83907.mail.sp1.yahoo.com>:

> Some years ago when I started flying FlightGear 2.0, I added
> --model-hz=480 to my startup aliases for reasons I no longer
> remember. 

..you're running the fdm at 480Hz. 

> I've continued to use these aliases through 2.4 and 2.6
> with no real ill effect.

..sounds fair,  the heavy load is graphics. 

> However, on a git build from June 13 I've noticed that using them
> really clobbers the framerate.  Instead of getting 30 - 50 fps
> without this argument, I get more like 1-2 fps with it set.  These
> frame rates are based on a default configuration, with the .fgfs
> directory erased immediately before starting.

..guys?  Help needed.
 
> I'm not sure if this is a bug or just a change in the way that this
> flag functions, but at the very least we should note in the
> documentation that this command-line argument can create problems
> with 2.7.
> 
> Even without this flag set, I'm getting extremely low frame rates of
> 1 - 4 fps on at least some aircraft (e.g., the Trimotor) until the
> aircraft breaks ground, then it suddenly jumps to 30+ fps.  Landing
> and taking off again retains the 30+ fps frame rate.
> 
> 8-core AMD machine, 8 G RAM, nVidia GTX 560,

..big enough iron, might even haul your 560 at useful frame
rates on the nouveau driver.  

> running Kubuntu Maverick.

..updated?  

-- 
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.

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