Ground loop problem? As a test only, what happens if you unplug power on the printer, or turn the printer off? If it is a ground loop issue - I did hear of this recently with a USB hard drive I think - then possibly it's a cable issue or maybe you could stuck a USB hub in the middle to break the loop? (Just guessing!) ;-) On the off chance it's something more nefarious, what are the relative IRQ priorities of the USB controller vs. the sound card? I Assume the sound card's IRQ has a high realtime priority? If not, and it's lower than USB, then possibly there is some strange interaction. I've never run into anything like that with USB, but I have with other devices like a mouse, etc. Hope this helps. (not holding my breath!) ;-) Cheers, Mark On 7/21/06, Dave Phillips <dlphillips@xxxxxxxxxx> wrote:
Greetings: I hooked up my new HP 6540 printer today, it's a beauty, but it creates a terrible noise through my speakers when it's running. Is this a known problem with USB devices ? Is it a mobo problem ? (This is happening on my old 800 MHz machine.) Short of disconnecting the cable when the printer isn't being used, is there a solution to this trouble ? Best, dp
