On mercredi 17 septembre 2008, gerard robin wrote:
> Hello,
>
> Running without any problem with FG on a 32 bits computer (which my usual
> computer)
> recently, I have had to build FlightGear on a 64 bit computer with FC9.
> Both computers have the same GPU (Nvidia 7800 GS AGP 8).
> I was disappointed with the result FG works with a huge Jitter, like we had
> in the past, which is now , to me, solved (32 bits environment).
>
> Does anybody has got a similar problem ?
> Where do i must look for to solve the problem ? did i  forgot some
> parameters with ./configure and/or make ?
>
> Cheers
>
> NB:Openscenegraphe had been automatically built 64 bits  ( lib64 library).

Again on that topic, i was wrong about 64 bit , which has nothing to do with 
the stutter/jitter within FG.

The explanation is:
 the computer (a dual core AMD 64 x2 6400) which is involved has the Linux 
operating system FC9, which, unfortunately, include the last KDE desktop 4.1.
That desktop "eat" some GL resources due to the desktop effects, and probably 
conflicts with any other   applications which want GL, 
Tested, Celestia...... and FlightGear, the result is a huge stutter  .

Fortunately it is possible to deactivate the desktop-effect.
And everything is coming back right and smooth.

Cheers

BTW I don't know if that problem is FC9 only, or if it happen to any Linux 
operating which include KDE 4.1.

-- 
Gérard
http://pagesperso-orange.fr/GRTux/

"J'ai décidé d'être heureux parce que c'est bon pour la santé. 
Voltaire "


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