On vr, 2007-06-08 at 20:48 -0600, Larry Bernstone wrote: > While we are on the subject of the problems in the nForce4, I'd like to > ask a question, and see if anybody knows what the deal is. I suspect > the problems I have with DMA on this board are due to PCI latency > issues. However, when I do a lspci -v, all the devices are set to > latency=0 (except for the PVR-150). If I do a setpci, it shows that the > timer changes, but a lspci -v shows that it does not in fact change. > Any ideas why this is? Is it just due to a crappy BIOS, or is this a > known behavior problem, and can it be resolved somehow?
PCI express does not have latency and therefore anything hooked up with it will show it as 0. PCI works in parralel with other devices and needs to share the bus with other devices. PCI express is serial so no sharing. For PCI you can give some devices more priority on the bus then others and this is called latency (higher is more priority). Changing the overall layency of the system via the bios setup to 64 or something higher might help. Greets Sander _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
