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.