Hi lists, After installing an old 100Mbit PCI Ethernet card to my machine, it has complained a few times about spurious interrupts ("nobody cared") at a random time of the day. After the oops is reported, my USB keyboard (HP smart card keyboard) stops working properly -- it has lots of delay, it misses some keystrokes and also causes "stuck keys". Strangely enough my USB mouse continues to work without problems. Apparently the USB controller and the Ethernet card share an interrupt line. Un-/replugging the keyboard does not help. So far I have simply rebooted to fix the issue. I haven't been able to reproduce this on will despite my best attempts. The Ethernet card is driven by the tulip driver and is listed as "ADMtek NC100 Network Everywhere Fast Ethernet 10/100 (rev 11)" in lspci. My motherboard uses the Intel H77 chipset (ASRock H77 Pro4/MVP) Here are two slightly different examples of the oops report; the effect is the same: kernel: irq 16: nobody cared (try booting with the "irqpoll" option) kernel: Pid: 0, comm: swapper/2 Not tainted 3.5.3-1-ARCH #1 kernel: Call Trace: kernel: <IRQ> [<ffffffff810d4d3d>] __report_bad_irq+0x3d/0xe0 kernel: [<ffffffff810d5033>] note_interrupt+0x1a3/0x1f0 kernel: [<ffffffff810d292f>] handle_irq_event_percpu+0xbf/0x260 kernel: [<ffffffff810d2b18>] handle_irq_event+0x48/0x70 kernel: [<ffffffff810d5b4a>] handle_fasteoi_irq+0x5a/0x100 kernel: [<ffffffff810160c2>] handle_irq+0x22/0x40 kernel: [<ffffffff81484cea>] do_IRQ+0x5a/0xe0 kernel: [<ffffffff8147c12a>] common_interrupt+0x6a/0x6a kernel: <EOI> [<ffffffffa02d8f01>] ? acpi_idle_enter_c1+0xda/0x104 [processor] kernel: [<ffffffffa02d8edc>] ? acpi_idle_enter_c1+0xb5/0x104 [processor] kernel: [<ffffffff8134f159>] cpuidle_enter+0x19/0x20 kernel: [<ffffffff8134f7a6>] cpuidle_idle_call+0xa6/0x330 kernel: [<ffffffff8101daaf>] cpu_idle+0xbf/0x130 kernel: [<ffffffff8146a19b>] start_secondary+0x203/0x20a kernel: handlers: kernel: [<ffffffffa012c0b0>] usb_hcd_irq [usbcore] kernel: [<ffffffffa023b1c0>] tulip_interrupt [tulip] kernel: Disabling IRQ #16 kernel: irq 16: nobody cared (try booting with the "irqpoll" option) kernel: Pid: 0, comm: swapper/0 Not tainted 3.5.3-1-ARCH #1 kernel: Call Trace: kernel: <IRQ> [<ffffffff810d4d3d>] __report_bad_irq+0x3d/0xe0 kernel: [<ffffffff810d5033>] note_interrupt+0x1a3/0x1f0 kernel: [<ffffffff810d292f>] handle_irq_event_percpu+0xbf/0x260 kernel: [<ffffffff810d2b18>] handle_irq_event+0x48/0x70 kernel: [<ffffffff810d5b4a>] handle_fasteoi_irq+0x5a/0x100 kernel: [<ffffffff810160c2>] handle_irq+0x22/0x40 kernel: [<ffffffff81484cea>] do_IRQ+0x5a/0xe0 kernel: [<ffffffff8147c12a>] common_interrupt+0x6a/0x6a kernel: <EOI> [<ffffffffa01b6f01>] ? acpi_idle_enter_c1+0xda/0x104 [processor] kernel: [<ffffffffa01b6edc>] ? acpi_idle_enter_c1+0xb5/0x104 [processor] kernel: [<ffffffff8134f159>] cpuidle_enter+0x19/0x20 kernel: [<ffffffff8134f7a6>] cpuidle_idle_call+0xa6/0x330 kernel: [<ffffffff8101daaf>] cpu_idle+0xbf/0x130 kernel: [<ffffffff81456fbc>] rest_init+0x80/0x84 kernel: [<ffffffff818bbc35>] start_kernel+0x3c1/0x3ce kernel: [<ffffffff818bb673>] ? repair_env_string+0x5e/0x5e kernel: [<ffffffff818bb356>] x86_64_start_reservations+0x131/0x135 kernel: [<ffffffff818bb45a>] x86_64_start_kernel+0x100/0x10f kernel: handlers: kernel: [<ffffffffa012c0b0>] usb_hcd_irq [usbcore] kernel: [<ffffffffa02b41c0>] tulip_interrupt [tulip] kernel: Disabling IRQ #16 These are after a fresh reboot... % lspci |grep Eth 03:00.0 Ethernet controller: ADMtek NC100 Network Everywhere Fast Ethernet 10/100 (rev 11) 04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) % dmesg |egrep -i 'eth|tulip' [ 7.868120] tulip: Linux Tulip driver version 1.1.15 (Feb 27, 2007) [ 7.868146] tulip: tulip_init_one: Enabled WOL support for AN983B [ 7.870487] tulip0: MII transceiver #1 config 1000 status 786d advertising 05e1 [ 7.893274] net eth0: ADMtek Comet rev 17 at Port 0xe000, 00:06:25:48:7f:16, IRQ 16 [ 7.902994] systemd-udevd[162]: renamed network interface eth0 to eth1 [ 7.989822] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded [ 7.990148] r8169 0000:04:00.0: eth0: RTL8168evl/8111evl at 0xffffc90005798000, bc:5f:f4:44:29:6c, XID 0c900800 IRQ 47 [ 7.990150] r8169 0000:04:00.0: eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko] [ 16.032206] r8169 0000:04:00.0: eth0: link down [ 16.032568] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 18.287417] r8169 0000:04:00.0: eth0: link up [ 18.287761] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 18.437518] tulip 0000:03:00.0: eth1: tulip_stop_rxtx() failed (CSR5 0xfc664010 CSR6 0xff972113) [ 18.437530] net eth1: Setting full-duplex based on MII#1 link partner capability of 45e1 Somewhat suspect is the "tulip_stop_rxtx() failed" line. I also get that line every time I stop the interface (using ip link set eth1 down): Sep 14 12:40:11 wrx kernel: tulip 0000:03:00.0: eth1: tulip_stop_rxtx() failed (CSR5 0xfc664010 CSR6 0xff972113) Sep 14 12:40:11 wrx kernel: net eth1: Setting full-duplex based on MII#1 link partner capability of 45e1 Sep 14 12:40:12 wrx NetworkManager[386]: <info> (eth1): carrier now OFF (device state 100, deferring action for 4 seconds) Sep 14 12:40:12 wrx kernel: tulip 0000:03:00.0: eth1: tulip_stop_rxtx() failed (CSR5 0xfc07c013 CSR6 0xff970111) % cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 0: 48 0 0 0 IO-APIC-edge timer 1: 2 1 0 0 IO-APIC-edge i8042 8: 164 5 2 0 IO-APIC-edge rtc0 9: 0 0 0 0 IO-APIC-fasteoi acpi 12: 3 0 1 0 IO-APIC-edge i8042 16: 141 346 8067481 2394 IO-APIC-fasteoi ehci_hcd:usb1, eth1 23: 319 18623 7406 31659 IO-APIC-fasteoi ehci_hcd:usb2 40: 0 0 0 0 PCI-MSI-edge PCIe PME 41: 0 0 0 0 PCI-MSI-edge PCIe PME 42: 0 0 0 0 PCI-MSI-edge PCIe PME 43: 22382 61895 31816 10217 PCI-MSI-edge ahci 44: 0 0 0 0 PCI-MSI-edge ahci 45: 0 0 0 0 PCI-MSI-edge xhci_hcd 46: 12 1 0 0 PCI-MSI-edge mei 47: 6 2 2 32904 PCI-MSI-edge eth0 48: 75136 39014 54183 22566 PCI-MSI-edge i915 49: 267 295 254 57 PCI-MSI-edge snd_hda_intel NMI: 40906 21860 26792 17063 Non-maskable interrupts LOC: 362056 362594 377195 364303 Local timer interrupts SPU: 0 0 0 0 Spurious interrupts PMI: 40906 21860 26792 17063 Performance monitoring interrupts IWI: 6 3 3 2 IRQ work interrupts RTR: 3 0 0 0 APIC ICR read retries RES: 241774 18622 10902 4227 Rescheduling interrupts CAL: 108 116 119 139 Function call interrupts TLB: 26279 11870 16395 25314 TLB shootdowns TRM: 0 0 0 0 Thermal event interrupts THR: 0 0 0 0 Threshold APIC interrupts MCE: 0 0 0 0 Machine check exceptions MCP: 11 11 11 11 Machine check polls ERR: 0 MIS: 0 Regards, Marti -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html