Date: Tue, 11 Feb 2003 11:03:19 -0500 From: Jason Andresen <jandrese@mitre.org> To: Steven <magusbaal@digitalbastards.net> Cc: freebsd-stable@freebsd.org Subject: Re: PCI oddity Message-ID: <3E491EC7.3020300@mitre.org> In-Reply-To: <002001c2d186$302725d0$3802a8c0@internal.digitalbastards.net> References: <002001c2d186$302725d0$3802a8c0@internal.digitalbastards.net>
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Steven wrote: > I have an abit bx133 board with a similar problem. The box runs linux, but > experienced the same problem in the same place, when it was probing the > drives. I narrowed the problem down to lack of IRQ's. Here's what I did to > work around this: > > Go into the BIOS, disable the Serial and Parallel if you don't need them. > You may also need to set IRQs 3,4,7 to PCI instead of ISA on that board. > Look under the PCI section, if it exists. You should be able to specify > IRQ's for several of the PCI slots, try playing with those. Turn off > Plug'n'Play OS Installed, give it a whirl, or turn it on (I've some some > luck with this on other boxes). I had to turn off PnP OS, specify different > IRQ's for each PCI slot to force them not to share, and have all unused > hardware disabled to free up IRQ's. > > Hopefully this will be of some use to you :) Thanks for the tip, but I've already tried that. I turned off both serial ports and the parallel port and hardwired all of the IRQs down. It didn't help. If there was a card in both the fourth and fifth slot it crashed on probe anyway. Plus I got a lot of stray IRQ7s. This machine isn't all that tight for IRQ space anyway because it has no soundcard or ISA hardware. I think I still have a couple of free IRQs. IIRC, PCI only specifies 4 IRQ lines for the cards though, so you have to share if you have more than 4 PCI slots. Is this correct? I'm still curious if this is a problem with FreeBSD, with my motherboard, or with the Cards themselves. Is it unusual for a card to share nicely? Not one manual for any of my cards even mentions IRQ sharing. -- \ |_ _|__ __|_ \ __| Jason Andresen jandrese@mitre.org |\/ | | | / _| Network and Distributed Systems Engineer _| _|___| _| _|_\___| Office: 703-883-7755 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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