IRQ Conflict with Wireless adapter and 56k modem?
in [Asus]
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From: daytripper on 24 Jan 2010 23:25 On Sun, 24 Jan 2010 19:33:48 -0700, "peter" <peter(a)nowhere.net> wrote: [...]2 pieces of hardware usually can share an IRQ but 3 causes problems. 'Tain't necessarily so. fwiw, on my most heavily configured system, I have a SAS host adapter and a SCSI host adapter sharing IRQ 9 with the on-board USB hc; and a PCI nic, PCI 1394 hc and a PCI USB hc sharing IRQ 10. So that's two sets of three devices sharing interrupts on the same system. And you could only wish you had a system that was as reliable as this one - it easily hit "five nines" of availability in 2009 :-) Cheers
From: Paul on 24 Jan 2010 23:43 slim26 wrote: > I just got a new Linksys WMP600N wireless adapter for my old ASUS A8V > motherboard. > > I am having issues trying to boot the computer now with both this > adapter and my 56k modem (used for caller id software) at the same > time. When both are plugged in, I can not get any action on my > monitor or a beep from the computer starting. > > From my research, I'm thinking I have an IRQ conflict. Does this > sound accurate? > > Any ideas on how I can resolve the conflict and get the computer to > boot? Is it possible I won't be able to resolve? > > Thanks. Motherboards of that era, have a physical interrupt wiring pattern (swizzle pattern), in the user manual. Now, unfortunately, it has turned out that this table is not always correct, and some users have figured out the table on their own, by observation (i.e. detected the errors by watching IRQ number assignment). ftp://ftp.asus.com/pub/asus/mb/socket939/a8v/e1994_a8v.pdf On your board, PCI slot 4 is independent of other wires, so might be considered "private". If you have a theory as to which card is misbehaving, I'd plug that card into that slot and test. If you have some other motherboard from the A8V line, there are manuals for those as well. Also, in the BIOS history of that board (in the BIOS download section of support.asus.com.tw), it says [ 0228 ] Fix system will hang up during booting when both AGP graphic card and Dlink 4-port server card installed. So the board does have a history of a problem like that, and so flashing a BIOS later than that one may help. Sometimes, when you see a release note for a bug fix like that, it is actually a couple of BIOS later before it is really fixed. The latest BIOS is "0229" from 2007/06/07. Take a look through the vip.asus.com forums before flashing. Sometimes, if a flash method is known to brick the motherboard, you can learn about the issue in advance, by looking through the threads here. http://vip.asus.com/forum/topic.aspx?board_id=1&model=A8V&SLanguage=en-us For example, this is educational: "Asus A8V bios 0229 buggy as hell?" http://vip.asus.com/forum/view.aspx?id=20100104182708718&board_id=1&model=A8V&page=1&SLanguage=en-us So perhaps "0228" would be the best candidate. They mention 0219 as being a better one, but then you might not get any benefit for whatever fixes might be in 0228. In any case, I see enough issues just reading a few threads there, to not expect a lot from that board. Paul
From: slim26 on 25 Jan 2010 00:42
Thanks to both you . I do have the latest 0229 bios on there.. it is the base A8V (yes, a pretty old one, but still working great nonetheless). My theory for slot 5 not working is because in the book, it says it's shared with the video card. My guess is my video card doesn't like to share with another device. I have a difficult time trying to find out which IRQ is assigned for each slot. I think Windows 7 is automatically reassigning it's own IRQ upon boot, so I can't see what the bios is trying to give it. Windows is giving it an IRQ of 17 (higher then what the bios goes up to - 15). In my settings, it lists the IRQs that are configurable, but only give me two options - PCI or Reserved. They are all set to PCI. Should I try to set any to Reserved. I've played around with it some, and haven't had much luck with that either. Out of the two cards, my suspect card is the modem being it's so old. The wifi nic is brand new and probably plays nicely. I've tried putting the modem in slot 4, which isn't supposed to be shared, with the wifi card in any other slot, no avail. I guess the only real thing to do is flip some of these IRQs in the bios from PCI to Reserved, although as I mentioned, have not had success with that so far. On Jan 24, 11:43 pm, Paul <nos...(a)needed.com> wrote: > slim26 wrote: > > I just got a new Linksys WMP600N wireless adapter for my old ASUS A8V > > motherboard. > > > I am having issues trying to boot the computer now with both this > > adapter and my 56k modem (used for caller id software) at the same > > time. When both are plugged in, I can not get any action on my > > monitor or a beep from the computer starting. > > > From my research, I'm thinking I have an IRQ conflict. Does this > > sound accurate? > > > Any ideas on how I can resolve the conflict and get the computer to > > boot? Is it possible I won't be able to resolve? > > > Thanks. > > Motherboards of that era, have a physical interrupt wiring pattern > (swizzle pattern), in the user manual. Now, unfortunately, it has > turned out that this table is not always correct, and some users > have figured out the table on their own, by observation (i.e. detected > the errors by watching IRQ number assignment). > > ftp://ftp.asus.com/pub/asus/mb/socket939/a8v/e1994_a8v.pdf > > On your board, PCI slot 4 is independent of other wires, so might > be considered "private". If you have a theory as to which card is > misbehaving, I'd plug that card into that slot and test. > > If you have some other motherboard from the A8V line, there are > manuals for those as well. > > Also, in the BIOS history of that board (in the BIOS download section > of support.asus.com.tw), it says > > [ 0228 ] > Fix system will hang up during booting when both AGP graphic card > and Dlink 4-port server card installed. > > So the board does have a history of a problem like that, and so flashing > a BIOS later than that one may help. Sometimes, when you see a release > note for a bug fix like that, it is actually a couple of BIOS later > before it is really fixed. > > The latest BIOS is "0229" from 2007/06/07. > > Take a look through the vip.asus.com forums before flashing. Sometimes, > if a flash method is known to brick the motherboard, you can learn about > the issue in advance, by looking through the threads here. > > http://vip.asus.com/forum/topic.aspx?board_id=1&model=A8V&SLanguage=e... > > For example, this is educational: > > "Asus A8V bios 0229 buggy as hell?" > http://vip.asus.com/forum/view.aspx?id=20100104182708718&board_id=1&m... > > So perhaps "0228" would be the best candidate. They mention 0219 as being > a better one, but then you might not get any benefit for whatever fixes > might be in 0228. In any case, I see enough issues just reading a few threads > there, to not expect a lot from that board. > > Paul |