Bjorn, For your computer: [philippe@victor ~]$ grep APIC dmesg.txt ACPI: APIC CFF80390, 006C (r1 A_M_I_ OEMAPIC 10000814 MSFT 97) ACPI: Local APIC address 0xfee00000 Using APIC driver default ACPI: Local APIC address 0xfee00000 ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x82] disabled) ACPI: LAPIC (acpi_id[0x04] lapic_id[0x83] disabled) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23 Enabling APIC mode: Flat. Using 1 I/O APICs mapped APIC to ffffb000 (fee00000) mapped IOAPIC to ffffa000 (fec00000) ENABLING IO-APIC IRQs ACPI: Using IOAPIC for interrupt routing For my computer: [philippe@victor ~]$ grep APIC dmesg_victor.txt ACPI: APIC 7FFB0390, 0078 (r1 A M I OEMAPIC 7000720 MSFT 97) ACPI: Local APIC address 0xfee00000 Using APIC driver default ACPI: Local APIC address 0xfee00000 ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x82] disabled) ACPI: LAPIC (acpi_id[0x04] lapic_id[0x83] disabled) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) IOAPIC[0]: apic_id 2, version 3, address 0xfec00000, GSI 0-23 ACPI: IOAPIC (id[0x03] address[0xfecc0000] gsi_base[24]) IOAPIC[1]: apic_id 3, version 3, address 0xfecc0000, GSI 24-47 Enabling APIC mode: Flat. Using 2 I/O APICs Booting processor 1 APIC 0x1 ip 0x6000 ACPI: Using IOAPIC for interrupt routing So I have 2 I/O APIC's used for interrupt routing. You have only one. Your computer: [philippe@victor ~]$ [philippe@victor ~]$ grep ACPI dmesg.txt BIOS-e820: 00000000cff80000 - 00000000cff8e000 (ACPI data) BIOS-e820: 00000000cff8e000 - 00000000cffe0000 (ACPI NVS) ACPI: RSDP 000FBCD0, 0024 (r2 ACPIAM) ACPI: XSDT CFF80100, 0054 (r1 A_M_I_ OEMXSDT 10000814 MSFT 97) ACPI: FACP CFF80290, 00F4 (r3 A_M_I_ OEMFACP 10000814 MSFT 97) ACPI: DSDT CFF80440, 90AA (r1 A0751 A0751077 77 INTL 20060113) ACPI: FACS CFF8E000, 0040 ACPI: APIC CFF80390, 006C (r1 A_M_I_ OEMAPIC 10000814 MSFT 97) ACPI: MCFG CFF80400, 003C (r1 A_M_I_ OEMMCFG 10000814 MSFT 97) ACPI: OEMB CFF8E040, 0081 (r1 A_M_I_ AMI_OEM 10000814 MSFT 97) ACPI: HPET CFF894F0, 0038 (r1 A_M_I_ OEMHPET 10000814 MSFT 97) ACPI: OSFR CFF89530, 00B0 (r1 A_M_I_ OEMOSFR 10000814 MSFT 97) ACPI: Local APIC address 0xfee00000 ACPI: PM-Timer IO Port: 0x808 ACPI: Local APIC address 0xfee00000 ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x82] disabled) ACPI: LAPIC (acpi_id[0x04] lapic_id[0x83] disabled) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) ACPI: IRQ0 used by override. ACPI: IRQ2 used by override. ACPI: IRQ9 used by override. ACPI: HPET id: 0x8086a301 base: 0xfed00000 Using ACPI (MADT) for SMP configuration information ACPI: Core revision 20080609 ACPI: Checking initramfs for custom DSDT tbxface-0596 [00] tb_load_namespace : ACPI Tables successfully acquired evxfevnt-0091 [00] enable : Transition to ACPI mode successful ACPI: bus type pci registered ACPI: EC: Look up EC in DSDT ACPI: Interpreter enabled ACPI: (supports S0 S1 S3 S4 S5) ACPI: Using IOAPIC for interrupt routing PCI: MCFG area at e0000000 reserved in ACPI motherboard resources ACPI: PCI Root Bridge [PCI0] (0000:00) pci 0000:00:1f.0: quirk: region 0800-087f claimed by ICH6 ACPI/GPIO/TCO ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P2._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P1._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P8._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P9._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P4._PRT] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 *5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 10 11 12 *14 15) ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKF] (IRQs *3 4 5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 11 12 14 *15) ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 *7 10 11 12 14 15) ACPI Warning (tbutils-0217): Incorrect checksum in table [OEMB] - 72, should be 69 [20080609] pnp: PnP ACPI init ACPI: bus type pnp registered pnp: PnP ACPI: found 15 devices ACPI: ACPI bus type pnp unregistered PnPBIOS: Disabled by ACPI PNP PCI: Using ACPI for IRQ routing ACPI: RTC can wake from S4 ACPI: SSDT CFF8E0D0, 01D2 (r1 AMI CPU1PM 1 INTL 20060113) processor ACPI_CPU:00: registered as cooling_device0 ACPI: SSDT CFF8E2B0, 0143 (r1 AMI CPU2PM 1 INTL 20060113) processor ACPI_CPU:01: registered as cooling_device1 ACPI: No dock devices found. ACPI: Power Button (FF) [PWRF] ACPI: Power Button (CM) [PWRB] ACPI: I/O resource 0000:00:1f.3 [0x400-0x41f] conflicts with ACPI region SMRG [0x400-0x40f] ACPI: Device needs an ACPI driver ACPI: I/O resource w83627ehf [0x295-0x296] conflicts with ACPI region HWRE [0x290-0x299] ACPI: Device needs an ACPI driver [philippe@victor ~]$ My computer: [philippe@victor ~]$ [philippe@victor ~]$ grep ACPI dmesg_victor.txt BIOS-e820: 000000007ffb0000 - 000000007ffc0000 (ACPI data) BIOS-e820: 000000007ffc0000 - 000000007fff0000 (ACPI NVS) ACPI: RSDP 000F8060, 0014 (r0 ACPIAM) ACPI: RSDT 7FFB0000, 0034 (r1 A M I OEMRSDT 7000720 MSFT 97) ACPI: FACP 7FFB0200, 0084 (r2 A M I OEMFACP 7000720 MSFT 97) ACPI: DSDT 7FFB0450, 5319 (r1 4CDS2 4CDS2141 141 INTL 2002026) ACPI: FACS 7FFC0000, 0040 ACPI: APIC 7FFB0390, 0078 (r1 A M I OEMAPIC 7000720 MSFT 97) ACPI: MCFG 7FFB0410, 003C (r1 A M I OEMMCFG 7000720 MSFT 97) ACPI: OEMB 7FFC0040, 0051 (r1 A M I AMI_OEM 7000720 MSFT 97) ACPI: Local APIC address 0xfee00000 ACPI: PM-Timer IO Port: 0x808 ACPI: Local APIC address 0xfee00000 ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x82] disabled) ACPI: LAPIC (acpi_id[0x04] lapic_id[0x83] disabled) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) ACPI: IOAPIC (id[0x03] address[0xfecc0000] gsi_base[24]) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level) ACPI: IRQ0 used by override. ACPI: IRQ2 used by override. ACPI: IRQ9 used by override. Using ACPI (MADT) for SMP configuration information ACPI: Core revision 20081204 ACPI: bus type pci registered ACPI: EC: Look up EC in DSDT ACPI: Interpreter enabled ACPI: (supports S0 S1 S3 S4 S5) ACPI: Using IOAPIC for interrupt routing PCI: MCFG area at e0000000 reserved in ACPI motherboard resources ACPI: No dock devices found. ACPI: PCI Root Bridge [PCI0] (0000:00) ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P9._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0PA._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.NBPG._PRT] ACPI: PCI Root Bridge [PCI1] (0000:80) ACPI: PCI Interrupt Routing Table [\_SB_.PCI1._PRT] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 *6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI Warning (tbutils-0242): Incorrect checksum in table [OEMB] - A1, should be 7A [20081204] PCI: Using ACPI for IRQ routing pnp: PnP ACPI init ACPI: bus type pnp registered pnp: PnP ACPI: found 15 devices ACPI: ACPI bus type pnp unregistered acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 ACPI: Power Button (FF) [PWRF] ACPI: Sleep Button (CM) [SLPB] ACPI: Power Button (CM) [PWRB] processor ACPI_CPU:00: registered as cooling_device0 ACPI: Processor [CPU1] (supports 16 throttling states) processor ACPI_CPU:01: registered as cooling_device1 ACPI: Processor [CPU2] (supports 16 throttling states) parport_pc 00:05: reported by Plug and Play ACPI [philippe@victor ~]$ You have the following: PnPBIOS: Disabled by ACPI PNP (should be Plug and Play BIOS) ACPI: Device needs an ACPI driver (repeated twice. I do not know what it means; it does not sound sane). I have two PCI Root Bridges; you have only one. Perhaps this is in correlation with the number of I/O APIC's. Your computer: [philippe@victor ~]$ grep Linux dmesg.txt Linux version 2.6.27.21-0.1-pae (geeko@buildhost) (gcc version 4.3.2 [gcc-4_3-branch revision 141291] (SUSE Linux) ) #1 SMP 2009-03-31 14:50:44 +0200 Linux Plug and Play Support v0.97 (c) Adam Belay usb usb1: Manufacturer: Linux 2.6.27.21-0.1-pae uhci_hcd usb usb2: Manufacturer: Linux 2.6.27.21-0.1-pae uhci_hcd usb usb3: Manufacturer: Linux 2.6.27.21-0.1-pae uhci_hcd usb usb4: Manufacturer: Linux 2.6.27.21-0.1-pae ehci_hcd usb usb5: Manufacturer: Linux 2.6.27.21-0.1-pae uhci_hcd usb usb6: Manufacturer: Linux 2.6.27.21-0.1-pae uhci_hcd usb usb7: Manufacturer: Linux 2.6.27.21-0.1-pae uhci_hcd usb usb8: Manufacturer: Linux 2.6.27.21-0.1-pae ehci_hcd Linux agpgart interface v0.103 My computer: [philippe@victor ~]$ grep Linux dmesg_victor.txt Linux version 2.6.29.5-191.fc11.i586 (mockbuild@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc version 4.4.0 20090506 (Red Hat 4.4.0-4) (GCC) ) #1 SMP Tue Jun 16 23:11:39 EDT 2009 SELinux: Initializing. SELinux: Starting in permissive mode SELinux: Registering netfilter hooks Linux agpgart interface v0.103 usb usb1: Manufacturer: Linux 2.6.29.5-191.fc11.i586 uhci_hcd usb usb2: Manufacturer: Linux 2.6.29.5-191.fc11.i586 uhci_hcd usb usb3: Manufacturer: Linux 2.6.29.5-191.fc11.i586 uhci_hcd usb usb4: Manufacturer: Linux 2.6.29.5-191.fc11.i586 uhci_hcd SELinux: Disabled at runtime. SELinux: Unregistering netfilter hooks So a more recent Linux kernel than yours. My kernel is non-PAE. The command reports 8 usb buses on your computer and 4 on mine. Your computer: [philippe@victor ~]$ grep PCI dmesg.txt Allocating PCI resources starting at d4000000 (gap: d0000000:2ee00000) PCI: MCFG configuration 0: base e0000000 segment 0 buses 0 - 255 PCI: Not using MMCONFIG. PCI: PCI BIOS revision 3.00 entry at 0xf0031, last bus=5 PCI: Using configuration type 1 for base access PCI: MCFG configuration 0: base e0000000 segment 0 buses 0 - 255 PCI: MCFG area at e0000000 reserved in ACPI motherboard resources PCI: Using MMCONFIG for extended config space ACPI: PCI Root Bridge [PCI0] (0000:00) PCI: 0000:00:1a.0 reg 20 io port: [b800, b81f] PCI: 0000:00:1a.1 reg 20 io port: [b880, b89f] PCI: 0000:00:1a.2 reg 20 io port: [bc00, bc1f] PCI: 0000:00:1a.7 reg 10 32bit mmio: [f9fffc00, f9ffffff] PCI: 0000:00:1b.0 reg 10 64bit mmio: [f9ff8000, f9ffbfff] PCI: 0000:00:1d.0 reg 20 io port: [b080, b09f] PCI: 0000:00:1d.1 reg 20 io port: [b400, b41f] PCI: 0000:00:1d.2 reg 20 io port: [b480, b49f] PCI: 0000:00:1d.7 reg 10 32bit mmio: [f9fff800, f9fffbff] PCI: 0000:00:1f.2 reg 10 io port: [a000, a007] PCI: 0000:00:1f.2 reg 14 io port: [9c00, 9c03] PCI: 0000:00:1f.2 reg 18 io port: [9880, 9887] PCI: 0000:00:1f.2 reg 1c io port: [9800, 9803] PCI: 0000:00:1f.2 reg 20 io port: [9480, 948f] PCI: 0000:00:1f.2 reg 24 io port: [9400, 940f] PCI: 0000:00:1f.3 reg 10 64bit mmio: [f9fff400, f9fff4ff] PCI: 0000:00:1f.3 reg 20 io port: [400, 41f] PCI: 0000:00:1f.5 reg 10 io port: [b000, b007] PCI: 0000:00:1f.5 reg 14 io port: [ac00, ac03] PCI: 0000:00:1f.5 reg 18 io port: [a880, a887] PCI: 0000:00:1f.5 reg 1c io port: [a800, a803] PCI: 0000:00:1f.5 reg 20 io port: [a480, a48f] PCI: 0000:00:1f.5 reg 24 io port: [a400, a40f] PCI: 0000:01:00.0 reg 10 32bit mmio: [fd000000, fdffffff] PCI: 0000:01:00.0 reg 14 64bit mmio: [d0000000, dfffffff] PCI: 0000:01:00.0 reg 1c 64bit mmio: [fa000000, fbffffff] PCI: 0000:01:00.0 reg 24 io port: [cc00, cc7f] PCI: 0000:01:00.0 reg 30 32bit mmio: [fe4e0000, fe4fffff] PCI: bridge 0000:00:01.0 io port: [c000, cfff] PCI: bridge 0000:00:01.0 32bit mmio: [fa000000, fe4fffff] PCI: bridge 0000:00:01.0 64bit mmio pref: [d0000000, dfffffff] PCI: bridge 0000:00:1c.0 64bit mmio pref: [f8f00000, f8ffffff] PCI: 0000:03:00.0 reg 24 32bit mmio: [fe6fe000, fe6fffff] PCI: 0000:03:00.0 reg 30 32bit mmio: [fe6e0000, fe6effff] PCI: 0000:03:00.1 reg 10 io port: [dc00, dc07] PCI: 0000:03:00.1 reg 14 io port: [d880, d883] PCI: 0000:03:00.1 reg 18 io port: [d800, d807] PCI: 0000:03:00.1 reg 1c io port: [d480, d483] PCI: 0000:03:00.1 reg 20 io port: [d400, d40f] Pre-1.1 PCIe device detected, disable ASPM for 0000:00:1c.4. It can be enabled forcedly with 'pcie_aspm=force' PCI: bridge 0000:00:1c.4 io port: [d000, dfff] PCI: bridge 0000:00:1c.4 32bit mmio: [fe600000, fe6fffff] PCI: 0000:02:00.0 reg 10 64bit mmio: [fe5c0000, fe5fffff] PCI: 0000:02:00.0 reg 30 32bit mmio: [fe5a0000, fe5bffff] Pre-1.1 PCIe device detected, disable ASPM for 0000:00:1c.5. It can be enabled forcedly with 'pcie_aspm=force' PCI: bridge 0000:00:1c.5 32bit mmio: [fe500000, fe5fffff] PCI: 0000:05:01.0 reg 10 32bit mmio: [fe800000, febfffff] PCI: 0000:05:02.0 reg 10 32bit mmio: [fe7ff000, fe7fffff] PCI: 0000:05:02.0 reg 14 io port: [e800, e8ff] PCI: 0000:05:03.0 reg 10 32bit mmio: [fe7fe800, fe7fefff] PCI: 0000:05:03.0 reg 14 io port: [ec00, ec7f] PCI: bridge 0000:00:1e.0 io port: [e000, efff] PCI: bridge 0000:00:1e.0 32bit mmio: [fe700000, febfffff] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P2._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P1._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P8._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P9._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P4._PRT] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 *5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 10 11 12 *14 15) ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKF] (IRQs *3 4 5 6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 11 12 14 *15) ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 *7 10 11 12 14 15) PCI: Using ACPI for IRQ routing pci 0000:00:01.0: PCI bridge, secondary bus 0000:01 pci 0000:00:1c.0: PCI bridge, secondary bus 0000:04 pci 0000:00:1c.4: PCI bridge, secondary bus 0000:03 pci 0000:00:1c.5: PCI bridge, secondary bus 0000:02 pci 0000:00:1e.0: PCI bridge, secondary bus 0000:05 pci 0000:00:01.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 pci 0000:00:1c.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 pci 0000:00:1c.4: PCI INT A -> GSI 17 (level, low) -> IRQ 17 pci 0000:00:1c.5: PCI INT B -> GSI 16 (level, low) -> IRQ 16 serial 0000:05:02.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 pata_jmicron 0000:03:00.1: PCI INT B -> GSI 17 (level, low) -> IRQ 17 ahci 0000:03:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 ata_piix 0000:00:1f.2: PCI INT B -> GSI 22 (level, low) -> IRQ 22 ata_piix 0000:00:1f.5: PCI INT B -> GSI 22 (level, low) -> IRQ 22 uhci_hcd 0000:00:1a.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 uhci_hcd 0000:00:1a.1: PCI INT B -> GSI 21 (level, low) -> IRQ 21 uhci_hcd 0000:00:1a.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18 ehci_hcd 0000:00:1a.7: PCI INT C -> GSI 18 (level, low) -> IRQ 18 uhci_hcd 0000:00:1d.0: PCI INT A -> GSI 23 (level, low) -> IRQ 23 uhci_hcd 0000:00:1d.1: PCI INT B -> GSI 19 (level, low) -> IRQ 19 uhci_hcd 0000:00:1d.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18 ehci_hcd 0000:00:1d.7: PCI INT A -> GSI 23 (level, low) -> IRQ 23 nvidia 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 atl1 0000:02:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 i801_smbus 0000:00:1f.3: PCI INT C -> GSI 18 (level, low) -> IRQ 18 ohci1394 0000:05:03.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 ohci1394: fw-host0: OHCI-1394 1.1 (PCI): IRQ=[16] MMIO=[fe7fe800-fe7fefff] Max Packet=[2048] IR/IT contexts=[4/8] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22 My computer: [philippe@victor ~]$ grep PCI dmesg_victor.txt Allocating PCI resources starting at 88000000 (gap: 80000000:7ec00000) PCI: MCFG configuration 0: base e0000000 segment 0 buses 0 - 255 PCI: Not using MMCONFIG. PCI: PCI BIOS revision 3.00 entry at 0xf0031, last bus=128 PCI: Using configuration type 1 for base access PCI: MCFG configuration 0: base e0000000 segment 0 buses 0 - 255 PCI: MCFG area at e0000000 reserved in ACPI motherboard resources PCI: Using MMCONFIG for extended config space ACPI: PCI Root Bridge [PCI0] (0000:00) ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0P9._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P0PA._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.NBPG._PRT] ACPI: PCI Root Bridge [PCI1] (0000:80) ACPI: PCI Interrupt Routing Table [\_SB_.PCI1._PRT] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 *6 7 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled. ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 *10 11 12 14 15) PCI: Using ACPI for IRQ routing pci 0000:00:01.0: PCI bridge, secondary bus 0000:01 pci 0000:00:02.0: PCI bridge, secondary bus 0000:02 pci 0000:00:13.1: PCI bridge, secondary bus 0000:03 pci 0000:00:02.0: PCI INT A -> GSI 27 (level, low) -> IRQ 27 PCI: VIA PCI bridge detected. Disabling DAC. pci_hotplug: PCI Hot Plug PCI Core version: 0.5 pciehp: PCI Express Hot Plug Controller Driver version: 0.4 acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 uhci_hcd 0000:00:10.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20 uhci_hcd 0000:00:10.1: PCI INT B -> GSI 22 (level, low) -> IRQ 22 uhci_hcd 0000:00:10.2: PCI INT C -> GSI 21 (level, low) -> IRQ 21 uhci_hcd 0000:00:10.3: PCI INT D -> GSI 23 (level, low) -> IRQ 23 sata_via 0000:00:0f.0: PCI INT B -> GSI 21 (level, low) -> IRQ 21 pci 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 via-rhine 0000:00:12.0: PCI INT A -> GSI 23 (level, low) -> IRQ 23 rt61pci 0000:03:04.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 HDA Intel 0000:80:01.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 HDA Intel 0000:80:01.0: PCI: Disallowing DAC for device pci 0000:03:05.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 So less IRQ conflicts on my computer than on yours. Linux for your computer highlights the following: " Pre-1.1 PCIe device detected, disable ASPM for 0000:00:1c.4. It can be enabled forcedly with 'pcie_aspm=force' " I do not know whether setting kernel boot parameter pcie_aspm=force would really improve in your case. This is to be checked and eventually tested. Kind regards to you. - http://vouters.dyndns.org:8080/ Philippe Vouters (Fontainebleau/France) On dim., 2009-07-12 at 19:41 -0300, Bjorn Wielens wrote: > Hmm... that makes things difficult: > - The only physical device in a PCI slot on my computer is the modem. > - I cannot move the video card- it is in the only PCI-E x16 slot on my > motherboard. > > - The ethernet controller on IRQ219 is odd, but it still works. I think > the driver is moving it to this IRQ on loading. > > - I will try enabling the legacy USB devices/disabling USB2, and install > only the 536EP modem for now. > > - My BIOS only offers two options for SATA and IDE: On or off. Since I > have both a SATA main drive (and DVDRW) as well as an IDE data drive, I > cannot disable either. > > - I've already tried moving the modem among the three free slots in the > motherboard. No success. > > - My BIOS offers no options for manually setting the IRQs. > > - What would really make things easy is if all USB devices did as USB is > supposed to, and share only one IRQ for the whole USB bus. > > If you have any suggestions, I'd like to hear them - There are a few > things I'd like to try with my Windows install too. > > Once I have some more time, I'll also try booting with a Live CD to see > what the interrupt config is like. > > Best, > Bjorn. > > > > > Philippe Vouters wrote: > > Dear Bjorn, > > > >>From this URL link and at the bottom of it, it says: > > "To resolve conflicts with PCI or ISA cards try manually setting them in > > your motherboard's BIOS or try a different slot for the newly installed > > device, you will usually find that by changing the slot you will change > > the IRQ channel as well." > > > > You may reorder and much simplify the number of PCI boards on your PCI > > bus by removing all useless. Some of them being needless and conflicting > > may be removed using your motherboard BIOS. Your PCI bus seems to be > > full. To avoid IRQ conflicts between your USBs and your Nvidia graphic > > board you might perhaps move it to another slot. > > > > - > > http://vouters.dyndns.org:8080/ > > Philippe Vouters (Fontainebleau/France) > > > > > > > > >
