Laurence Vanek wrote: > Laurence Vanek wrote: > >> Curtis Olson wrote: >> >> >>> On 6/4/07, *Laurence Vanek* wrote: >>> >>> Just reporting what the numbers say. My refresh rate is indeed set at >>> 85 Hz. HUD reports the frame rates I gave above. >>> >>> The insane rates came after the discovery of the cmake -i approach when >>> building OSG. >>> >>> One week ago I had these high frame rates but with no stick-slip. >>> >>> Im not complaining, just reporting what I see. builds I made one week >>> ago did not display this behavior. >>> >>> >>> I would suggest going into your video card settings and enabling "sync >>> to vblank". That should cap your frame rates at your video display >>> refresh rate (which is a good thing all around) and the problem should >>> go away. >>> >>> Curt. >>> -- >>> >>> >> Curt - >> >> I have the following set using the NVIDIA X Server Settings tool: >> >> X Server Xvideo Settings: >> >> video Texture Adapter --> Sync To VBlank >> >> video Blitter Adapter --> Sync To VBlank >> >> OpenGL Settings: >> >> Sync To VBlank >> >> With those settings I still get the high frame rates (> 175 fps) & >> stick-slip behavior. >> >> Interesting the situation is better with weather set to "none" rather >> than METAR. Also observe that the worst stick-slip (maybe stutter is >> better description) coincides with very high frame rates (>200 fps). >> >> I was better off not building OSG optimized for this system. >> >> This is not my "first rodeo" with FG on this system. It would seem >> something fundamental has changed with the code. Perhaps others can >> confirm (or not) after building the latest sources. >> >> >> > Continuing my conversation with myself, would anyone care to weigh in on > the speculation that the black dot patch for the rendering artifacts we > had several weeks ago may have been the root cause of the issue > described above? Im not a developer so I probably dont know WTF Im > talking about but I thought I would raise the point. I did not have the > stick-slip problem prior, using the same hardware. > > Did find on Fedora 7 that AIGLX is enabled by default. I added the following to my /etc/xorg.conf file to disable this stuff:
============ Section "Extensions" Option "Composite" "Disable" EndSection ============ This made a significant improvement in the "stick-slip" behavior. It did not eliminate it so apparently more fooling around is required. There are quite a few posts on nvida's support forum with regard to this issue. Appears to have multiple causes. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Flightgear-users mailing list Flightgear-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-users
