Firefox/4.0.2pre SeaMonkey/2.1pre
From: Dave Yeo
tholen@antispam.ham wrote:
> And here's an excerpt of what the PCI utility reports:
>
> ============================================================
> Device 00E0h uPD720100A USB 2.0 EHCI Controller (Version 2.0)
> System IRQ 5, INT# C
>
> Device 2445h 82801BA/BAM AC'97 Audio Controller (ICH2/ICH2-M B4 step)
> System IRQ 9, INT# B
>
> Device 2443h 82801BA/BAM SMBus Controller (ICH2/ICH2-M B4 step)
> System IRQ 9, INT# B
>
> Device 2442h 82801BA/BAM USB Controller #1 (ICH2/ICH2-M B4 step)
> System IRQ 10, INT# D
>
> Device 0035h uPD720100A USB OpenHCI Controller (Version 1.0)
> System IRQ 10, INT# A
>
> Device 0525h MGA-G400/450 Chipset
> System IRQ 11, INT# A
>
> Device 0035h uPD720100A USB OpenHCI Controller (Version 1.0)
> System IRQ 11, INT# B
>
> Device 2449h 82801BA LAN Controller (ICH2 B2-B5, ICH2X B0/C0 steps)
> System IRQ 11, INT# A
>
> Device 0080h 29160/N/LP Ultra160 (AIC-7892A) SCSI Host Adapter
> System IRQ 11, INT# A
>
> Device 0080h 29160/N/LP Ultra160 (AIC-7892A) SCSI Host Adapter
> System IRQ 15, INT# A
>
> ROM PCI IRQ routing table Tests....
> ROM IRQ routing table found at F000h:2B20h
> Table Version 1.0 - OK
> Table size 240 bytes - OK
> Table Checksum 84h - OK
> PCI Interrupt Router: 82801BA LPC Interface (ICH2 B4 step)
> IRQ's dedicated to PCI : None
> Error: connectivity mismatches for link value 63:
> Bus=0 Device=31 Pin=INTA# Map=3,4,5,6,7,9,10,11,12,14,15
> Bus=2 Device= 1 Pin=INTA# Map=9,10,11
> The ROM PCI IRQ routing table appears to be faulty!!
>
> IRQ Summary: IRQs 5,9,10,11,15 are used by PCI devices
> Shared IRQs: IRQ 9 is shared by 2 PCI Devices
> IRQ 10 is shared by 2 PCI Devices
> IRQ 11 is shared by 4 PCI Devices
> ============================================================
>
> So although IRQ 9 is shared by two devices, they're both
> associated with audio (SMBus presumably refers to the
> SoundMax Bus, as indicated by the Hardware Manager).
> Interesting that the Hardware Manager says that SoundMax
> has exclusive use of the IRQ while the PCI program says
> it's shared. Anyway, playing just audio hasn't been a
> problem.
Actually the SMBus is another bus, used for things like the temperature
monitor on the motherboard. You're probably right about sharing the IRQ
not mattering but I'm far from being a hardware guru.
The USB OpenHCI Controller also shares INT #B (PCI actually only has 4
IRQs on one level).
You could temporarily try disabling USB in BIOS or remming out the
driver and test.
>
> And IRQ 10 is shared by two devices, both associated with
> legacy USB support (the UHCI controller and one of the
> two OHCI controllers).
>
> It's IRQ 11 that is associated with my Matrox card, the
> other OHCI USB controller, one of the SCSI cards, and my
> network adapter. Meanwhile, IRQ 13 appears to be unused
> (Hardware Manager didn't show anything associated with
> 7 or 14 either).
>
> Unsure of what the message about the faulty routing table
> means.
I've seen that message on most of my motherboards. Also not sure what it
means but it usually seems harmless.
>
> I've never manipulated the system at such a low level. Is
> it possible to configure it so that the video uses IRQ 13?
It depends on the BIOS. You might be able to manipulate it in the BIOS
by setting various IRQs to legacy. If it was a PCI card then you could
move it to a different slot.
Perhaps someone more knowledgeable will chime in
Dave
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