[vox-tech] [OT] IRQ's under win2k

[Mark K. Kim]

I don't use win2k but...

If you go to the device manager under the control panel, then click on the
resources tab, you might be able to assign resources manually.

-Mark


On Sat, 13 Dec 2003, Peter Jay Salzman wrote:

> hi all,
>
> i have a linux/win2k dual boot.  everything is fine under linux, but
> i've got IRQ problems under windows.
>
> the sound sucks under win2k, but only when playing games.  it's fine
> when playing mp3's.  looking at the control panel, i noticed that the
> whole damned system is assigned to IRQ 11:
>
>     linux           win2k
>
> 1   timer           timer
> 2   keyboard
> 3   cascade
> 4   scsi            com1
> 5
> 6                   floppy
> 7
> 8   rtc             rtc
> 9                   ACPI
> 10
> 11  sound/usb/net   sound/usb/net/scsi/tv capture/AGP
> 12  PS2             PS/2
> 13                  mathco
> 14  ide0            ide0
> 15  ide1            id1
>
>
> the problem is obvious -- sound cards generally don't like sharing IRQ's
> to begin with, but having sound and video on the same IRQ is enough to
> kill sound on games.  if i can get either sound or video off of 11, i'm
> sure everything will be fine.
>
> but here's the rub.  linux works perfectly.  i'm reluctant to start
> pulling PCI cards out and redistributing them, because i don't want to
> trade a problem under windows for a problem under linux.  besides,
> everything is on 11, so i don't see how shuffling cards would work in
> this case.
>
> any ideas on what i should do?  i'm sufficiently unfamiliar with windows
> that i'm not sure what resources are available to help resolve the
> problem.
>
> i can't find anything saying "assign IRQ X to PCI slot Y" in BIOS.
> maybe i just don't know where to look.
>
> however, there's options to "let BIOS assign IRQ X" and "reserve IRQ X".
> i'm not sure what "reserve" means, but i'm assuming that "reserve" means
> "don't assign IRQ X because an ISA card is going to want it".
>
> the machine in question uses a networked printer and has no serial
> devices, so IRQ's 3, 4, 5, and 7 are useless.  however, i can't find a
> way to tell windows to use them.
>
> help?
>
> pete
>
> ps- this kind of problem wouldn't happen under an AMD64 system, right?
>
> pps- this just emphasizes the fact that i really have no idea how IRQ's
> are assigned to begin with.  i know that certain PCI ports are tied to
> share certain IRQ's, hence "shuffling PCI cards" is a way of dealing
> with IRQ conflicts.  and i know that you can instruct BIOS not to assign
> IRQ's to let ISA cards take them.  but there must be more to that.  why
> would all my PCI cards be assigned to the same IRQ?  does anybody
> *really* know the nitty gritty details of how these things are assigned?
>
> --
> Make everything as simple as possible, but no simpler.  -- Albert Einstein
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Mark K. Kim
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