On Thursday 20 December 2007 15:31:47 Chris Hodge wrote: > Hal, > Do you what the ATI equivalent of Sync to VBlank? I've gone through all the > video card settings in both ATI Catalyst and ATI Tray Tools and do not > see that option. Thanks. > > Here's my hardware specs: > Compaq Presario, Windows XP with > AMD Athalon processor, 3200, ~2.2 GHz > 1 GB PC2700 DDR SDRAM > 512 MB ATI Radeon X1600 AGP graphics card
Sorry no I don't know where this would be set for the AMD/ATI driver. Also I see you are running Windows and I don't (other than for building and testing my own software) so I have no idea where this would be set there. I know that in the past that the AMD/ATI linux drivers OpenGL support was not nearly as good as what was available with the Nvidia drivers. But I also know that since ATI became part of AMD that their Linux drivers have improved significantly (over teh last year) and that they have had significant staffing increases in that area. There are significant differences between how my machine is configured and yours. I am running Linux and have a 7950GT Nvidia card. So these two things could explain why I am no longer seeing any stuttering and why it appears to be worse on your system. I suspect that most of the developers are running systems closer to my configuration than yours (IE. Linux with an nvidia card) so it is likely that things are better sorted out for configurations that are similar. Hal > > On Dec 20, 2007 2:04 PM, Hal V. Engel <[EMAIL PROTECTED]> wrote: > > On Thursday 20 December 2007 00:15:09 Frederic Bouvier wrote: > > > Selon Nathaniel Homier : > > > > On Dec 19, 2007 8:42 PM, Chris Hodge <[EMAIL PROTECTED]> wrote: > > > > > First, a great big Thank You to everyone who had anything to do > > > > > with the 1.0.0 release. It looks great! > > > > > > > > > > However, I have a small problem. In contrast to the experience of > > > > Hal, > > > > > > > I almost never experienced stutters with 0.9.10, but I see them > > > > quite > > > > > > > often > > > > > > > > in > > > > > > > > > 1.0.0, especially when near the ground and when using the dynamic > > > > > cockpit view. This makes takeoffs very challenging. Any ideas of > > > > > how > > > > I > > > > > > > can reduce the stutters? > > > > > > > > > > thanks, > > > > > Chris > > > > > > > > The stutter is really horrible in 1.0.0. Try a lower video quality > > > > setting and see if that helps. It could be poor terrain loading or > > > > some internal system gone haywire. If it's the terrain your in luck > > > > probably but if it's something else your out of luck probably. > > > > > > Try to limit framerate by setting the /sim/frame-rate-throttle-hz > > > > property > > > > > to 30 or 60. > > > > > > By command line option : > > > --prop:/sim/frame-rate-throttle-hz=60 > > > > > > or In the advanced section of fgrun : > > > http://frbouvi.free.fr/flightsim/fgrun-advanced.jpg > > > > > > -Fred > > > > This has come up on the list before. There appear to be two things that > > users > > can do that have a significant impact on the stuttering. First in your > > OpenGL settings make sure that you have Sync to VBlank turned on, X11 > > users > > can use either nvclock or nvidia-settings for this. This locks the > > OpenGL refresh cycle to the actual physical refresh rate of the display. > > Then set > > > > --model-hz=<your vertical refresh rate> > > > > the value used for <your vertical refresh rate> is dependant on your > > display > > hardware and how it is setup. For most LCDs 60 is the correct number for > > CRTs it could be anything from 40 to 120 depending on the hardware and > > your > > video driver settings. I suspect that the same thing is true (IE. you > > should > > use a value that is based on your monitors refresh rate) for the > > frame-rate-throttle-hz setting although I have not used this setting. > > When > > you do this FG will synchronize the FDM with the video refresh rate which > > greatly improved the stuttering problem in 0.9.10 and 0.9.11 but did not > > completely fix it. When OpenGL and FG are setup this way it appears to > > totally fix the problem in FG 1.0.0 at least for my setup. My vertical > > refresh rate is 75Hz and I see FG frame rates that are either 75 > > frames/second when the scenery is simple or 37 frames/second when the > > scenery > > is more complex. If I did not have OpenGL and FG setup this way I would > > see > > frame rates that are much higher at some points but stuttering was a > > significant issue and would at times be very bad. The main thing is that > > this > > results in smooth video with no apparent pauses even under extreme > > conditions > > such low level aerobatics in version 1.0.0 at least on my hardware. > > > > Hal > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by: Microsoft > > Defy all challenges. Microsoft(R) Visual Studio 2005. > > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > > _______________________________________________ > > Flightgear-users mailing list > > Flightgear-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/flightgear-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Flightgear-users mailing list Flightgear-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-users
