Mike Fedyk wrote: > > On Thu, Apr 26, 2001 at 11:16:29AM -0500, Keith G. Murphy wrote: > > > > You see, the modem actually does work in the sense that you can send > > 'AT' strings to it and get 'OK''s back. > > > > It's just that it never can dial and make a connection successfully. It > > seems a more subtle problem than I would think you would have from an > > PNP difficulty. > > > Actually, you will get a response if you have the wrong IRQ, because the > Linux serial driver will poll the buffer every several seconds. > > The problem comes when there is more data than a simple at and response. > The card lifts an IRQ line, but the driver doesn't respond to it because it > is listening on another IRQ. > > This could definitely, be a PnP problem. > To make sure I understand this, what you are telling me is that a response to a command is pulled off by the driver polling the card's buffer?
But incoming data is "pushed" by the card, using an IRQ? It does make sense, now that I think about it. Wow, that's interesting. I had no idea it worked like that. I'm definitely going to try disabling PnP, if I can. Thanks for the input. And thanks to Hall Stevenson as well.
