On Sat, 30 Oct 2004, Duncan Sands wrote:

> > I think I tracked down the source of all this pain. It is the USB 
> > Controller: Intel Corp. 82371SB PIIX3 USB [Natoma/Triton II] (rev 01). I 
> > searched SpeedTouch mailing list for this one and found a few messages 
> > from people having problems with this host controller (I must have been 
> > blind I did not discovered them earlier). One of them 
> > (http://www.mail-archive.com/[EMAIL PROTECTED]/msg03622.html) even 
> > says a line about 0xFF sequences.
> > 
> > There seems to be a workaround in userspace driver by adding delay into 
> > read procedure though it affects the connection speed. Haven't tested it 
> > yet.
> > 
> > So now the question stands: Is there any way to get this buggy host 
> > controller work under Linux? I suppose that easiest thing to do would be 
> > to buy a new USB card. But I don't like this solution much because 
> > Windows can harness the controller without problems. Does anyone knows 
> > what causes problems with this specific controller in Linux?
> 
> Hi Andrej, that's an interesting link you found.  Maybe Alan can comment on
> this?

I was unaware of it.  The PIIX3 is pretty old now -- I've got a computer 
purchased back in the 1990's and it has a PIIX4.

Does the problem of lost interrupts still occur under 2.6.10-rc1?  Are the 
interrupts getting lost in the controller hardware, on the system board, 
or in the operating system?

Alan Stern



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