Re: [LAU] setting up hardware priority

On Tue, 16 Aug 2011 17:34:40 +0200
Clemens Ladisch <clemens@email-addr-hidden> wrote:

> Renato wrote:
> > Hello, I'm trying to find out if plugging my USB soundcard in
> > different USB ports of my laptop makes any difference. If I got it
> > right, I should choose the one with the lowest IRQ. So, with "lspci
> > -v" I can see I have 4 "USB Controller" devices, each with their
> > own IRQ (lowest one is 16 which seems to be shared by video
> > card...) - but how do I know which one my sound card is plugged
> > into?
>
> To see which bus belongs to which PCI device, run:
> ls -l /sys/bus/usb/devices/usb*

mmh, the output isn't very clear to me:

renato@email-addr-hidden ~ $ ls -l /sys/bus/usb/devices/usb*
lrwxrwxrwx 1 root root 0 Aug 16 14:25 /sys/bus/usb/devices/usb1 -> ../../../devices/pci0000:00/0000:00:1d.7/usb1
lrwxrwxrwx 1 root root 0 Aug 16 14:25 /sys/bus/usb/devices/usb2 -> ../../../devices/pci0000:00/0000:00:1d.0/usb2
lrwxrwxrwx 1 root root 0 Aug 16 14:25 /sys/bus/usb/devices/usb3 -> ../../../devices/pci0000:00/0000:00:1d.1/usb3
lrwxrwxrwx 1 root root 0 Aug 16 14:25 /sys/bus/usb/devices/usb4 -> ../../../devices/pci0000:00/0000:00:1d.2/usb4
lrwxrwxrwx 1 root root 0 Aug 16 14:25 /sys/bus/usb/devices/usb5 -> ../../../devices/pci0000:00/0000:00:1d.3/usb5

so on which pci device is my sound card (Native Instruments RigKontrol2) attached
if this is the output of lsusb?

renato@email-addr-hidden ~ $ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 002: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)
Bus 003 Device 003: ID 0a5c:4502 Broadcom Corp. Keyboard (Boot Interface Subclass)
Bus 001 Device 008: ID 17cc:1969 Native Instruments RigKontrol2
Bus 003 Device 004: ID 0a5c:4503 Broadcom Corp. Mouse (Boot Interface Subclass)
Bus 003 Device 005: ID 0a5c:2148 Broadcom Corp. BCM92046DG-CL1ROM Bluetooth 2.1 Adapter
Bus 002 Device 002: ID 09e8:007c AKAI Professional M.I. Corp.

cheers,
renato
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Received on Tue Aug 16 20:15:02 2011