Hello, I bought 2 identic USB audio device that work correctly with linux but when I restart linux or I keep the devices out and I put it in again they take another id. I need that the id would be always the same. I tried a first script called "A working example": http://alsa.opensrc.org/Udev but squeeze doesn't rename it... Then I tried other kind of tries that I paste below (please don't laugh about me :) I am not good with udev ) # KERNEL=="2-2", SUBSYSTEM=="usb", ACTION=="add", DRIVER=="usb", SYMLINK="test" # KERNEL=="controlC[0-9]*", SUBSYSTEM=="usb", ACTION=="add", SYMLINK="snd/controlC9" # KERNEL=="2-2:1.0", SUBSYSTEM=="usb", ACTION=="add", DRIVER=="usb", SYMLINK="snd/controlC9" # KERNEL=="2-2:1.1", SUBSYSTEM=="usb", ACTION=="add", DRIVER=="usb", SYMLINK="snd/pcmC9D0c" # KERNEL=="2-2:1.2", SUBSYSTEM=="usb", ACTION=="add", DRIVER=="usb", SYMLINK="snd/pcmC9D0p" # KERNEL=="2-2:1.0", SUBSYSTEM=="usb", ACTION=="add", DRIVER=="usb", SYMLINK="snd/controlC9" KERNEL=="controlC0", ACTION=="add" DRIVERS=="snd", NAME="snd/controlC9" As you can see it doesn't work...the only thing I could do was to create a symlink but that's not important to me, i couldn't rename the devices that's what I need What I precisely need is to join one or more particular USB portsto the same alsa device id. I will decide which one doing it in /proc/asound/devices ---- udevadm info --query all --path /sys/bus/usb/devices/2-2 --attribute-walk Udevadm info starts with the device specified by the devpath and then walks up the chain of parent devices. It prints for every device found, all possible attributes in the udev rules key format. A rule to match, can be composed by the attributes of the device and the attributes from one single parent device. looking at device '/devices/pci0000:00/0000:00:10.0/usb2/2-2': KERNEL=="2-2" SUBSYSTEM=="usb" DRIVER=="usb" ATTR{configuration}=="" ATTR{bNumInterfaces}==" 4" ATTR{bConfigurationValue}=="1" ATTR{bmAttributes}=="80" ATTR{bMaxPower}=="100mA" ATTR{urbnum}=="63" ATTR{idVendor}=="08bb" ATTR{idProduct}=="2902" ATTR{bcdDevice}=="0100" ATTR{bDeviceClass}=="00" ATTR{bDeviceSubClass}=="00" ATTR{bDeviceProtocol}=="00" ATTR{bNumConfigurations}=="1" ATTR{bMaxPacketSize0}=="8" ATTR{speed}=="12" ATTR{busnum}=="2" ATTR{devnum}=="2" ATTR{version}==" 1.10" ATTR{maxchild}=="0" ATTR{quirks}=="0x0" ATTR{authorized}=="1" ATTR{manufacturer}=="Burr-Brown from TI " ATTR{product}=="USB Audio CODEC " looking at parent device '/devices/pci0000:00/0000:00:10.0/usb2': KERNELS=="usb2" SUBSYSTEMS=="usb" DRIVERS=="usb" ATTRS{configuration}=="" ATTRS{bNumInterfaces}==" 1" ATTRS{bConfigurationValue}=="1" ATTRS{bmAttributes}=="e0" ATTRS{bMaxPower}==" 0mA" ATTRS{urbnum}=="36" ATTRS{idVendor}=="1d6b" ATTRS{idProduct}=="0001" ATTRS{bcdDevice}=="0206" ATTRS{bDeviceClass}=="09" ATTRS{bDeviceSubClass}=="00" ATTRS{bDeviceProtocol}=="00" ATTRS{bNumConfigurations}=="1" ATTRS{bMaxPacketSize0}=="64" ATTRS{speed}=="12" ATTRS{busnum}=="2" ATTRS{devnum}=="1" ATTRS{version}==" 1.10" ATTRS{maxchild}=="2" ATTRS{quirks}=="0x0" ATTRS{authorized}=="1" ATTRS{manufacturer}=="Linux 2.6.32-5-686 uhci_hcd" ATTRS{product}=="UHCI Host Controller" ATTRS{serial}=="0000:00:10.0" ATTRS{authorized_default}=="1" looking at parent device '/devices/pci0000:00/0000:00:10.0': KERNELS=="0000:00:10.0" SUBSYSTEMS=="pci" DRIVERS=="uhci_hcd" ATTRS{vendor}=="0x1106" ATTRS{device}=="0x3038" ATTRS{subsystem_vendor}=="0x1043" ATTRS{subsystem_device}=="0x3038" ATTRS{class}=="0x0c0300" ATTRS{irq}=="21" ATTRS{local_cpus}=="ffffffff" ATTRS{local_cpulist}=="0-31" ATTRS{modalias}=="pci:v00001106d00003038sv00001043sd00003038bc0Csc03i00" ATTRS{enable}=="1" ATTRS{broken_parity_status}=="0" ATTRS{msi_bus}=="" looking at parent device '/devices/pci0000:00': KERNELS=="pci0000:00" SUBSYSTEMS=="" DRIVERS=="" ---- /proc/asound# ls card0 card1 card2 cards default default_1 devices hwdep modules oss pcm seq timers V8237 version ---- /dev/snd# ls by-id by-path controlC0 controlC1 controlC2 pcmC0D0c pcmC0D0p pcmC0D1c pcmC0D1p pcmC1D0c pcmC1D0p pcmC2D0c pcmC2D0p seq timer ---- dmesg [ 1.520541] usb usb4: New USB device found, idVendor=1d6b, idProduct=0001 [ 1.520545] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 1.520549] usb usb4: Product: UHCI Host Controller [ 1.520552] usb usb4: Manufacturer: Linux 2.6.32-5-686 uhci_hcd [ 1.520555] usb usb4: SerialNumber: 0000:00:10.2 [ 1.520909] usb usb4: configuration #1 chosen from 1 choice [ 1.521101] hub 4-0:1.0: USB hub found [ 1.521126] hub 4-0:1.0: 2 ports detected [ 4285.848016] usb 2-1: new full speed USB device using uhci_hcd and address 3 [ 4286.169823] usb 2-1: New USB device found, idVendor=08bb, idProduct=2902 [ 4286.169830] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 4286.169834] usb 2-1: Product: USB Audio CODEC [ 4286.169837] usb 2-1: Manufacturer: Burr-Brown from TI [ 4286.170060] usb 2-1: configuration #1 chosen from 1 choice [ 4286.225195] input: Burr-Brown from TI USB Audio CODEC as /devices/pci0000:00/0000:00:10.0/usb2/2-1/2-1:1.3/input/input5 [ 4286.225961] generic-usb 0003:08BB:2902.0002: input,hidraw1: USB HID v1.00 Device [Burr-Brown from TI USB Audio CODEC ] on usb-0000:00:10.0-1/input3 ---- Every help will be important to me :) thanks. ------------------------------------------------------------------------------ Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. 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