I just bought a new 2.4 gig P4 system with a nice Intel D845PESV
SoundMax Integrated Digital Audio - IRQ 17 Intel 536EP v.92 Modem - IRQ 19 Intel Pro/100 VE Network Controller - IRQ 20
Kind of interesting (to me at least), typically "PC-compatible" meant hardware interrupts went up to 15 AND STOPPED. And this list corresponds very well to the devices I'm having trouble installing!
Has anyone else seen this before?
You wouldn't happen to have two processors, would you? This is exactly what it'll do. Each CPU will provide up to 15 IRQs. If you look in /var/log/dmesg, you should see something similar to this:
[NOTE: this is based on my dual PIII-733]
---------- CPU0: Intel Pentium III (Coppermine) stepping 03 [ ... snip ... ] CPU1: Intel Pentium III (Coppermine) stepping 03 Total of 2 processors activated (2920.57 BogoMIPS). ENABLING IO-APIC IRQs [ ... snip ... ] IRQ to pin mappings: IRQ0 -> 0:0 IRQ1 -> 0:1 IRQ3 -> 0:3 IRQ4 -> 0:4 IRQ6 -> 0:6 IRQ7 -> 0:7 IRQ8 -> 0:8 IRQ9 -> 0:9 IRQ12 -> 0:12 IRQ13 -> 0:13 IRQ14 -> 0:14 IRQ15 -> 0:15 IRQ16 -> 1:0 IRQ17 -> 1:1 IRQ18 -> 1:2 IRQ19 -> 1:3 IRQ20 -> 1:4 IRQ23 -> 1:7 IRQ26 -> 1:10 ----------
If you look at the IRQ mappings, you can tell which CPU is providing which IRQ, 0:* is CPU0 and 1:* is CPU1.
Further down, while probing the PCI bus, I get this:
---------- PCI: Probing PCI hardware PCI: Discovered peer bus 01 PCI->APIC IRQ transform: (B0,I2,P0) -> 19 PCI->APIC IRQ transform: (B0,I3,P0) -> 18 PCI->APIC IRQ transform: (B0,I6,P0) -> 26 PCI->APIC IRQ transform: (B0,I7,P0) -> 23 PCI->APIC IRQ transform: (B1,I4,P0) -> 16 PCI->APIC IRQ transform: (B1,I4,P1) -> 17 PCI->APIC IRQ transform: (B1,I10,P0) -> 20 ----------
And finally, when looking at /proc/interrupts, I get this:
----------
CPU0 CPU1 0: 83150590 82989093 IO-APIC-edge timer
1: 62 61 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
8: 1 0 IO-APIC-edge rtc
9: 485 520 IO-APIC-level usb-ohci
14: 2917177 2941262 IO-APIC-edge ide0
16: 7 9 IO-APIC-level aic7xxx
17: 8 8 IO-APIC-level aic7xxx
18: 662905 669133 IO-APIC-level eth0
20: 7 9 IO-APIC-level aic7xxx
23: 7450518 7300518 IO-APIC-level eth1
26: 106346 107223 IO-APIC-level ide2
NMI: 0 0
LOC: 166157602 166157712
ERR: 0
MIS: 1
----------
( yes, the machine has two onboard Adaptec aic7899 Ultra160 SCSI adapters and an add on Adaptec 29160 Ultra160 SCSI adapter, which accounts for aic7xxx taking up 3 different IRQs )
--
H| I haven't lost my mind; it's backed up on tape somewhere.
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Ashley M. Kirchner <mailto:[EMAIL PROTECTED]> . 303.442.6410 x130
IT Director / SysAdmin / WebSmith . 800.441.3873 x130
Photo Craft Laboratories, Inc. . 3550 Arapahoe Ave. #6
http://www.pcraft.com ..... . . . Boulder, CO 80303, U.S.A.
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