FWIW It seems the PCI bus is about half as fast as AGP, plus if you have any other PCI devices they're sharing the same bandwidth.
http://www.pcguide.com/ref/mbsys/buses/types/agpBus-c.html Probably more related to the stuttering than the zoomy effect. Just a quick thought. Simón On Fri, Oct 2, 2009 at 1:16 PM, Watson, Christer <[email protected]> wrote: > Okay, I'm looking for some pointers on a mythtv problem. I just bought a > NVidia Geforce 8400 GS (PCI) to replace a GeForce 5200 FX (AGP). I put the > card in and my mythbuntu 8.04 system seems to be running and recognizing the > new card using the same driver. However, there are two problems: > > 1) I do not actually see the entire desktop. About the outer 10% is cut-off. > This is somewhat annoying. I've used the nvidia-settings program to mess with > the "resolution" of the TV. However I don't really understand what that even > means. When I adjust from 1024x768 to lower resolutions, the problem appears > to get a bit worse. > > 2) When I watch live TV, there is a very strong stutter in the picture. Audio > appears to be okay. It appears as if every frame appears for about 1 sec, > then it skips to another frame about 1 sec later, etc. Not really watchable. > I've measured the CPU load while watching live TV and it is quite high > (mythfront.end -> 70%, Xorg -> 60%, I have hyperthreading so all the > percentages can add up to 200%). I suspect the problem is either in the > driver or xorg settings passed to the driver. I am worried, however, that the > problem is that I'm using a PCI slot (not PCI express, PCI). I have tried to > install more recent nvidia drivers, but I have run into some problems with my > first attempts. I downloaded the most recent binary blob > (NVIDIA-Linux-x86-185.18.36-pkg1.run) and ran it. After reboot, Xorg > complained that it could only boot into low graphics mode (VESA driver, I > believe). I am in the process of investigating why this install didn't seem > to work as expected. > > In any case, I thought I'd put a call out on this list to see if anyone had > suggestions. > > --Christer > _______________________________________________ > Fwlug mailing list > [email protected] > http://fortwaynelug.org/mailman/listinfo/fwlug_fortwaynelug.org > _______________________________________________ Fwlug mailing list [email protected] http://fortwaynelug.org/mailman/listinfo/fwlug_fortwaynelug.org
