I tried the approach with modifying the pci latency settings for the card. I did:
setpci -v -s 00:11.5 latency_timer=01
(and various small settings for the latency_timer worked well too)
The sound is much better now. I crackling sound is not completly
away but obviously it improved. What does the PCI latency setting exactly does? Does it increase the priority of this PCI device on the bus?
Putting the card into a different slot does not work, since it is a build in Sound device (and I just recently bought this motherboard). I am using a AGP graphics card already. Maybe I will try to modify some settings in the BIOS ...
Is there a possibility to get hold of the PCI settings for my sound device in Windows and in Linux, so that we can compare them to find out what they did to make it work smothly under Windows??
Thanks for your help.
Frank
PS: Esslingen is not too far away from my place Tuebingen ;-)
For reference your writing:
* As this card probably doesn't have a DMA FIFO buffer, it is susceptible
* to DMA traffic underruns (resulting in sound crackling/clicking/popping).
* This is the case with VIA chipsets or, in my case, an SiS735, which is
* supposed to be very fast and supposed to get rid of crackling much
* better than a VIA, yet ironically I still get crackling, like many other
* people with the same chipset.
* Possible remedies:
* - plug card into a different PCI slot, preferrably one that isn't shared
* too much (this helps a lot, but not completely !)
* - get rid of PCI VGA card, use AGP instead
* - upgrade or downgrade BIOS
* - fiddle with PCI latency settings (setpci -v -s BUSID latency_timer=XX)
* Not too helpful.
* - Disable ACPI/power management/"Auto Detect RAM/PCI Clk" in BIOS
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