hallo to all .

This is my first post to this list so please bare with me if i have made any mistake .

My problem is :

after every boot i receive the following message in terminal :

Sep 19 13:13:02 station2 kernel: irq 50: nobody cared (try booting with the "irqpoll" option) Sep 19 13:13:02 station2 kernel: [<c044e6fa>] __report_bad_irq+0x2b/0x69 Sep 19 13:13:02 station2 kernel: [<c044e8e7>] note_interrupt+0x1af/0x1e8 Sep 19 13:13:02 station2 kernel: [<c057afb4>] usb_hcd_irq+0x23/0x50 Sep 19 13:13:02 station2 kernel: [<c044df27>] handle_IRQ_event+0x23/0x49 Sep 19 13:13:02 station2 kernel: [<c044dfe8>] __do_IRQ+0x9b/0xd6 Sep 19 13:13:02 station2 kernel: [<c04073f4>] do_IRQ+0x93/0xae Sep 19 13:13:02 station2 kernel: [<c040592e>] common_interrupt+0x1a/0x20 Sep 19 13:13:02 station2 kernel: ======================= Sep 19 13:13:02 station2 kernel: handlers: Sep 19 13:13:02 station2 kernel: [<c057af91>] (usb_hcd_irq+0x0/0x50) Sep 19 13:13:02 station2 kernel: Disabling IRQ #5

And immediately after it my external usb drive vanishes from the nautilus file browser and i get messages like this in /var/log/messages :

usb 2-2: device not accepting address 3, error -110 Sep 19 14:15:09 station2 kernel: usb 2-2: new high speed USB device using ehci_hcd and address 4 Sep 19 14:15:21 station2 kernel: usb 2-2: device not accepting address 4, error -110 Sep 19 14:15:21 station2 kernel: usb 2-2: new high speed USB device using ehci_hcd and address 5 Sep 19 14:15:31 station2 kernel: usb 2-2: device not accepting address 5, error -110 Sep 19 14:15:31 station2 kernel: usb 2-2: new high speed USB device using ehci_hcd and address 6 Sep 19 14:15:42 station2 kernel: usb 2-2: device not accepting address 6, error -110 Sep 19 14:16:48 station2 kernel: usb 2-4: new high speed USB device using ehci_hcd and address 7 Sep 19 14:17:00 station2 kernel: usb 2-4: device not accepting address 7, error -110 Sep 19 14:17:00 station2 kernel: usb 2-4: new high speed USB device using ehci_hcd and address 8 Sep 19 14:17:11 station2 kernel: usb 2-4: device not accepting address 8, error -110

and the usb drive does not show up in nautilus any more. Then i have to reboot and after logging into x the drive shows up .but again after some time the same thing happens.

please help.

i don't know if i have given enough information.so please tell me if any more info is needed.

Thanks.