On Monday 24 Jan 2005 02:41, Li-lun Wang wrote: > Hi, > > My computer is a ThinkPad X31 with Pentium-M 1.4G CPU and ATI Radeon > Mobility M6 LY. I manually tweaked the ports tree and installed > FlightGear 0.9.8 on my FreeBSD 5.3-STABLE. Everything seemed to work > except that the frame rate was only around 3 fps and the CPU usage was > near 100%. > > It seemed to me that FlightGear was not using hardware acceleration. My > X-Window system is X.Org 6.8.1. According to glxinfo, the log file of X > server, and the system dmesg, DRI and drm are successfully loaded and > should be working. The frame rate for glxgears is 225 fps with rather > low CPU usage. >
> -- Leland Wang > > _______________________________________________ > Flightgear-users mailing list > [email protected] > http://mail.flightgear.org/mailman/listinfo/flightgear-users > 2f585eeea02e2c79d7b1d8c4963bae2d Hi there. You will find that FG always runs at near 100% CPU usage on even quite high end systems; there is plenty for it to do when it is running the FDM (Flight Dynamics Model) and the OpenGL display simultaneously. Flightgear is also *very* GPU intensive; I would think that a Radeon M6 (16Mb DDR IIRC) may not be up to the job really. For example, I have a 'middle of the road' card by modern standards, an FX5800U with a 500Mhz core and 128Mb 1000Mhz (DDR) driven by an AMD 3200XP whith 1GB dual-channel DDR. Comparatively with your card, I get 6000-6500fps in GLXGears. On my system I can expect at most 100fps but often 50 when there is a lot of detail on screen. Runway lights really reduce the frame rate - a trip to London Heathrow at night can drag the FPS down to 15-20. The basic idea here is that running FlightGear on a mid-end laptop may not work too well. Your best options are to: always fly in daylight, reduce the FG window size, deselect specular highlights and always fly low-poly or 2d-cockpit aircraft. Dave Martin _______________________________________________ Flightgear-users mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-users 2f585eeea02e2c79d7b1d8c4963bae2d
