CentOS - Sep 2008 - usb irq problem

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.

partha chowdhury wrote:
>> Sep 19 13:13:02 station2 kernel: irq 50: nobody cared (try booting with
the "irqpoll" option)
> 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.
What happens when you do what the error message above asks you to do?

When grub comes up, hit a key, then hit "a" to append something to the
kernel command line and then add irqpoll to the end of the kernel
command line.

If that works, edit /etc/grub.conf and add "irqpoll" to the end of the
kernel command line there.

Ralph
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i add the "irqpoll" option to kernel line. after the system booted i
log
into X with tty1 also login as root with the command " tail
-f /var/log/messages" for monitoring . After 10 to 20 minutes i got the
same message again but this time immediately the system froze up !

i tried it 5 times now and each time is the same result.i also noticed
that the system was behaving very slowly till the message came up like
usually folder copy operation - i usually get 70-90MB/s according to
vmstat 1  comand, but with irqpoll  the maximum i noticed was like
10MB/s.

Am i doing something wrong ?