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(Just joined the list right now, so sorry if this repeats stuff) |
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|
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I've been reading of problems with IRQ assignment in |
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gentoo-sources-2.4.19-r3 and r4. |
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|
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I experienced very similar problems when I tried the 2.5.x series (I |
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think 2.5.12 was the last on I tried) So I assume some of the code has |
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been taken from there, or from another tree. Having looked at it a bit, |
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it may be something to do with ACPI doing IRQ routing instead of the |
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on-board. |
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|
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Is there a known solution? |
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|
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Anyway, here's a description of my problem: |
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|
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USB and network card do not work under r3 or r4. with errors in dmesg |
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thus: |
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|
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Linux Tulip driver version 0.9.15-pre10 (Mar 8, 2002) |
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PCI: Could not assign IRQ 17 to device 02:0c.0 |
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eth0: Lite-On PNIC-II rev 37 at 0xd480ac00, 00:C0:F0:76:95:0A, IRQ 17. |
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|
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[SNIP] |
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|
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usb.c: registered new driver hub |
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uhci.c: USB Universal Host Controller Interface driver v1.1 |
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PCI: Could not assign IRQ 19 to device 00:1f.2 |
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PCI: Setting latency timer of device 00:1f.2 to 64 |
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uhci.c: USB UHCI at I/O 0xef40, IRQ 19 |
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usb.c: new USB bus registered, assigned bus number 1 |
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hub.c: USB hub found |
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hub.c: 2 ports detected |
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PCI: Could not assign IRQ 23 to device 00:1f.4 |
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PCI: Setting latency timer of device 00:1f.4 to 64 |
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uhci.c: USB UHCI at I/O 0xef80, IRQ 23 |
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usb.c: new USB bus registered, assigned bus number 2 |
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hub.c: USB hub found |
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hub.c: 2 ports detected |
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usb.c: registered new driver hid |
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hid-core.c: v1.8.1 Andreas Gal, Vojtech Pavlik <vojtech@××××.cz> |
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hid-core.c: USB HID support drivers |
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|
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All seems to be working-ish from that, but USB nor networrking actually |
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work. |
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|
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Then I noticed the following differences in my dmesg output: |
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|
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r1: |
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PCI: PCI BIOS revision 2.10 entry at 0xfda95, last bus=2 |
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PCI: Using configuration type 1 |
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PCI: Probing PCI hardware |
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Unknown bridge resource 0: assuming transparent |
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PCI: Discovered primary peer bus 08 [IRQ] |
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PCI: Using IRQ router PIIX [8086/2440] at 00:1f.0 |
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Linux NET4.0 for Linux 2.4 |
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Based upon Swansea University Computer Society NET3.039 |
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Initializing RT netlink socket |
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Starting kswapd |
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Journalled Block Device driver loaded |
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devfs: v1.12 (20020219) Richard Gooch (rgooch@××××××××××.au) |
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devfs: boot_options: 0x0 |
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Installing knfsd (copyright (C) 1996 okir@×××××××××.de). |
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ACPI: Core Subsystem version [20011018] |
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ACPI: Subsystem enabled |
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Power Resource: found |
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Power Resource: found |
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Power Resource: found |
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Power Resource: found |
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ACPI: System firmware supports S0 S1 S4 S5 |
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Processor[0]: C0 C1 |
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ACPI: Power Button (FF) found |
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ACPI: Sleep Button (CM) found |
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|
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|
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r3/4: |
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ACPI: Bus Driver revision 20020404 |
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ACPI: Core Subsystem revision 20020403 |
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PCI: PCI BIOS revision 2.10 entry at 0xfda95, last bus=2 |
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PCI: Using configuration type 1 |
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ACPI: Interpreter enabled |
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ACPI: Using IOAPIC for interrupt routing |
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ACPI: System [ACPI] (supports S0 S1 S4 S5) |
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ACPI: PCI Root Bridge [PCI0] (00:00:00.00) |
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Unknown bridge resource 0: assuming transparent |
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ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] |
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ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCI1._PRT] |
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ACPI: Power Resource [URP1] (off) |
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ACPI: Power Resource [URP2] (off) |
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ACPI: Power Resource [FDDP] (off) |
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ACPI: Power Resource [LPTP] (off) |
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PCI: Probing PCI hardware |
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PCI: Using ACPI for IRQ routing |
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|
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|
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The key things being: |
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i) In r1, the PCI hardware is probed first. |
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ii) In r1, the PIIX IRQ router is used, not the ACPI one. |
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|
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HTH - should I be mailing this to lkml? |
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|
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Cheers. |
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|
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Alex. |
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|
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-- |
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[ All programmers are playwrights and all computers are lousy actors. ] |
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My on-line log. http://www.x3ja.co.uk/ |
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