found 543275 2.6.32+28 thanks I've encountered exactly the same problem on a new workstation. The attachment contains syslog output, and /proc/interrupts after re-plugging a mouse to another USB port.
-- ...Bye..Dmitry.
Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613493] irq 16: nobody cared (try booting with the "irqpoll" option) Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613496] Pid: 0, comm: swapper Not tainted 2.6.32-5-686-bigmem #1 Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613501] Call Trace: Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613509] [<c107355d>] ? __report_bad_irq+0x24/0x69 Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613514] [<c1073564>] ? __report_bad_irq+0x2b/0x69 Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613518] [<c1073689>] ? note_interrupt+0xe7/0x13e Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613522] [<c1073bb7>] ? handle_fasteoi_irq+0x7a/0x97 Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613528] [<c1009e97>] ? handle_irq+0x17/0x1b Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613532] [<c1009719>] ? do_IRQ+0x38/0x89 Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613534] [<c10087d0>] ? common_interrupt+0x30/0x38 Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613538] [<c10300e0>] ? __build_sched_domains+0x18c/0x331 Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613547] [<f8531e7c>] ? acpi_idle_enter_c1+0x7b/0x97 [processor] Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613550] [<c11d6421>] ? cpuidle_idle_call+0x68/0xbb Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613552] [<c1007368>] ? cpu_idle+0x89/0xa5 Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613555] [<c13de80d>] ? start_kernel+0x318/0x31d Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613556] handlers: Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613557] [<f8054889>] (usb_hcd_irq+0x0/0x71 [usbcore]) Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613566] [<f8959637>] (azx_interrupt+0x0/0xe7 [snd_hda_intel]) Nov 25 13:03:16 dhcp-140-130 kernel: [78849.613569] Disabling IRQ #16 Nov 25 13:03:16 dhcp-140-130 kernel: [78849.711949] hda-intel: IRQ timing workaround is activated for card #0. Suggest a bigger bdl_pos_adj. [...re-plugging mouse...] Nov 25 13:17:42 dhcp-140-130 kernel: [79714.367985] usb 2-1: USB disconnect, address 9 Nov 25 13:17:45 dhcp-140-130 kernel: [79716.835287] usb 8-1: new low speed USB device using uhci_hcd and address 4 Nov 25 13:17:45 dhcp-140-130 kernel: [79717.010441] usb 8-1: New USB device found, idVendor=046d, idProduct=c063 Nov 25 13:17:45 dhcp-140-130 kernel: [79717.010445] usb 8-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Nov 25 13:17:45 dhcp-140-130 kernel: [79717.010448] usb 8-1: Product: DELL USB Laser Mouse Nov 25 13:17:45 dhcp-140-130 kernel: [79717.010451] usb 8-1: Manufacturer: DELL Nov 25 13:17:45 dhcp-140-130 kernel: [79717.010526] usb 8-1: configuration #1 chosen from 1 choice Nov 25 13:17:45 dhcp-140-130 kernel: [79717.028573] input: DELL DELL USB Laser Mouse as /devices/pci0000:00/0000:00:1d.2/usb8/8-1/8-1:1.0/input/input13 Nov 25 13:17:45 dhcp-140-130 kernel: [79717.028624] generic-usb 0003:046D:C063.000A: input,hidraw0: USB HID v1.10 Mouse [DELL DELL USB Laser Mouse] on usb-0000:00:1d.2-1/input0 $ cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 0: 48372038 0 0 0 IO-APIC-edge timer 1: 2 0 0 0 IO-APIC-edge i8042 4: 14939 0 0 0 IO-APIC-edge serial 7: 0 0 0 0 IO-APIC-edge parport0 8: 1 0 0 0 IO-APIC-edge rtc0 9: 0 0 0 0 IO-APIC-fasteoi acpi 12: 4 0 0 0 IO-APIC-edge i8042 16: 7600162 0 0 0 IO-APIC-fasteoi uhci_hcd:usb2, HDA Intel 17: 0 0 0 0 IO-APIC-fasteoi uhci_hcd:usb4, uhci_hcd:usb7 18: 34079 0 0 0 IO-APIC-fasteoi uhci_hcd:usb8 22: 35856 0 0 0 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb5 23: 5 0 0 0 IO-APIC-fasteoi ehci_hcd:usb3, uhci_hcd:usb6 53: 1746510 0 0 0 PCI-MSI-edge ahci 54: 2719453 0 0 0 PCI-MSI-edge eth1 55: 4 0 0 0 PCI-MSI-edge eth0 NMI: 0 0 0 0 Non-maskable interrupts LOC: 4011095 14953774 17586186 6469511 Local timer interrupts SPU: 0 0 0 0 Spurious interrupts PMI: 0 0 0 0 Performance monitoring interrupts PND: 0 0 0 0 Performance pending work RES: 333259 364716 360894 372681 Rescheduling interrupts CAL: 8706 10727 12635 8718 Function call interrupts TLB: 144419 149866 164947 159491 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: 273 273 273 273 Machine check polls ERR: 0 MIS: 0