Which motherboard is this? It's probably a common problem on
that motherboard and a google search may turn something up.
Generally, these are caused by PCI disconnect interrupts. When
data is sent to the card more quickly than it can deal with it, the
card pulls itself off the bus and the bridge keeps retrying the
data. As far as the graphics engine is concerned, pretty much
all drivers make sure they're not sending data to the graphics
engine when there's not room in its fifo. NVIDIA's drivers
use DMA so they don't even have to deal with that because the DMA
engine won't fetch the data unless there's room in the chip's fifo.
But there's still the issue of software rendering to the framebuffer.
CPU access to the framebuffer can still generate PCI disconnects.
Some motherboards/chipsets are more likely to show problems with
this than others.
Mark.
On 8 Jun 2003, Kelly Gibson wrote:
> I am running a dual-head system and I have a small problem with the
> sound related to the video cards. When sound is played on the AGP card
> there doesn't seem to be any problem at all, but when I watch a video,
> scroll on a web page, or open gnome-terminal and type on the pci card
> (the geforce 4) it will begin to distort badly. I have tried many
> "fixes" to this solution not limited to: adjusting the latency, moving
> pci cards around, recompiling Xfree, and reinstalling the nvidia
> driver. My setup seems to be otherwise just fine. I can post my
> XF86Config if necessary, but I am hoping this is some known issue.
>
> System specs:
>
> Gentoo Linux
> XFree86: 4.3.0
> using Nvidia's driver
> Xinerama is on (note this doesn't seem to matter)
> Athlon XP 1800
> 512mb mem
> Geforce 2
> geforce 4 mx440
>
> Other potentially relevant information:
>
> Bus 0, device 11, function 0:
> Multimedia audio controller: Ensoniq 5880 AudioPCI (rev 2).
> IRQ 3.
> Master Capable. Latency=248. Min Gnt=12.Max Lat=128.
> I/O at 0xd800 [0xd83f].
> Bus 0, device 15, function 0:
> VGA compatible controller: nVidia Corporation NV17 [GeForce4 MX440]
> (rev 163).
> IRQ 5.
> Master Capable. Latency=248. Min Gnt=5.Max Lat=1.
> Non-prefetchable 32 bit memory at 0x20000000 [0x20ffffff].
> Prefetchable 32 bit memory at 0x28000000 [0x2fffffff].
> Prefetchable 32 bit memory at 0x21000000 [0x2107ffff].
> Bus 1, device 0, function 0:
> VGA compatible controller: nVidia Corporation NV11 [GeForce2 MX]
> (rev 178).
> IRQ 11.
> Master Capable. Latency=248. Min Gnt=5.Max Lat=1.
> Non-prefetchable 32 bit memory at 0xcc000000 [0xccffffff].
> Prefetchable 32 bit memory at 0xb0000000 [0xb7ffffff].
>
> Thank you for your time,
>
> --
> Kelly Gibson <[EMAIL PROTECTED]>
> _______________________________________________
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>
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