On Tue, 16 Aug 2011 17:34:40 +0200 Clemens Ladisch <clemens@xxxxxxxxxx> 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@acerarch ~ $ 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@acerarch ~ $ 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 _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
