Re: PCI devices causing machine lockups on SX164

[Ivan Kokshaysky <ink jurassic park msu ru>]

On Fri, Mar 31, 2000 at 02:37:02AM +0200, Andreas Johansson wrote:
> The Pyxis PCI chipset obviously doesn't comply to this, instead it lets
> those devices make as long transfers as they like without any arbitration.
> 
Not correct. Cypress IDE DMA does affect the ISA bus, not PCI.
For example, PCI audio cards work fine with Cypress IDE.

> If I do 64kB block DMA from the disk and
> play audio at the same time, the audio output is garbled by FIFO underrun
> in the audio card's DMA. It sounds a little as if the audio is played at
> a too low and instable sample rate.

It's known problem with the Cypress chip. Try reducing BUSMASTER_TIMEOUT
value in drivers/ide/cy82c693.c

I don't know about bttv, but other hardware you listed should work fine
with the latest kernels.

Ivan.