localhost kernel disabling IRQ #21 message after trying a Maxim mp3 player

tethysgods · 05-06-2008, 12:01 PM

I have read the replies to similar questions, but I am still confused. Looking through the kernel configuration all the necessary scsi support and usb support is there (It's a 2.6 kernel). A standard mandriva 2007 installation does this automatically. What is more, other usb stuff is there.

Other standard usb stuff works fine, but this blasted
Maxim mp3 player doesn't.
I did have a usb mass storage camera where I had to
manually add to the "unusual devices" bit of the kernel.

I don't really understand much hardware stuff so
if you can explain what this part of dmesg output means, please do. I have no idea what the "nobody cared bit means, or how to boot with irqpoll if that is the important bit

usb 3-2: new full speed USB device using uhci_hcd and address 2
usb 3-2: configuration #1 chosen from 1 choice
irq 21: nobody cared (try booting with the "irqpoll" option)
<c01042d3> show_trace+0x13/0x20 <c0104a9e> dump_stack+0x1e/0x20
<c018de47> __report_bad_irq+0x27/0x90 <c018df3d> note_interrupt+0x8d/0x260
<c018d8ff> __do_IRQ+0xef/0x100 <c0105cad> do_IRQ+0x1d/0x30
<c0103b6a> common_interrupt+0x1a/0x20 <c0102261> cpu_idle+0x71/0xb0
<c0100675> rest_init+0x35/0x40 <c0422860> start_kernel+0x350/0x410
<c0100210> 0xc0100210
handlers:
[<e0831ca0>] (usb_hcd_irq+0x0/0x70 [usbcore])
[<e0831ca0>] (usb_hcd_irq+0x0/0x70 [usbcore])
[<e0831ca0>] (usb_hcd_irq+0x0/0x70 [usbcore])
Disabling IRQ #21
SCSI subsystem initialized
Initializing USB Mass Storage driver...
scsi0 : SCSI emulation for USB Mass Storage devices
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usb-storage: device found at 2
usb-storage: waiting for device to settle before scanning
Vendor: Model: Rev:
Type: Direct-Access ANSI SCSI revision: 00
usb-storage: device scan complete
SCSI device sda: 2033377 512-byte hdwr sectors (1041 MB)
sda: Write Protect is off
sda: Mode Sense: 00 c0 00 00
sda: assuming drive cache: write through
SCSI device sda: 2033377 512-byte hdwr sectors (1041 MB)
sda: Write Protect is off
sda: Mode Sense: 00 c0 00 00
sda: assuming drive cache: write through
sda: unknown partition table
sd 0:0:0:0: Attached scsi removable disk sda
sd 0:0:0:0: Attached scsi generic sg0 type 0
usb 3-2: USB disconnect, address 2

Peacedog · 05-08-2008, 07:54 PM

Hi tethysgods, If you're using lilo to boot add an append line to /etc/lilo.conf.

Code:

  image = /boot/kernelimage
  root = /dev/xdXX
  label = distro
  read-only
  append="irqpoll"

Remember to run lilo after the changes.

If you're using grub append in /boot/grub/menu.lst.

Code:

title		distro, kernel 2.6.x
root		(hdX,X)
kernel		/boot/vmlinuz-2.6.x root=/dev/xdXX ro quiet splash irqpoll
initrd		/boot/initrd.img-2.6.x
savedefalt
boot

There are some irq/acpi explanations here. Hope that helps.
Good luck. ;-)

tethysgods · 05-22-2008, 12:05 PM

Hi Peacedog

Thnaks ever so much. I have been ill for a while, so I only managed to try it today and it works (at least for the grub boot loader. My daughter will be pleased, but that means she will try and crowd me out even more!

Peacedog · 05-22-2008, 12:14 PM

Glad that sorted you.
Good luck. ;-)