[mythtv-users] udev rules for two devices with the same name

[Barry Williams]

On Thu, Feb 19, 2009 at 6:28 PM, john <jppoet at gmail.com> wrote:
>
> On Feb 19, 2009, at 12:42 AM, Nicolas Will wrote:
>
>> On Thu, 2009-02-19 at 13:13 +1030, Barry Williams wrote:
>>>
>>> Hi guys,
>>> I am trying to get the dvico digital dual 4 remote to work with my
>>> mythbuntu setup I have followed this guide
>>> http://ubuntuforums.org/showthread.php?t=616103 with these exceptions
>>> http://ubuntuforums.org/showpost.php?p=6232229&postcount=42 as I am
>>> using a rev2 card except unlike tvars my /dev/input/eventx's do tend
>>> to change, depending if I have my game pad plugged in or another
>>> keyboard & mouse. I can get it to work by manually setting a simlink
>>> to the first device and deleting the second device but is there a  way
>>> to get udev to pick up the first
>>> dKERNEL=="event*",SYSFS{name}=="IR-receiver inside an USB DVB
>>> receiver",SYMLINK="input/irremote0"
>>> KERNEL=="event*",SYSFS{name}=="IR-receiver inside an USB DVB
>>> receiver",SYMLINK="input/irremote1" evice even thought they are both
>>> labled exactly the same
>>>
>>> last two line of output of dmesg|grep IR
>>> [   11.007274] input: IR-receiver inside an USB DVB receiver as
>>> /devices/pci0000:00/0000:00:14.4/0000:04:07.2/usb8/8-1/input/input8
>>> [   11.399469] input: IR-receiver inside an USB DVB receiver as
>>> /devices/pci0000:00/0000:00:14.4/0000:04:07.2/usb8/8-2/input/input9
>>>
>>> I have tried something like this
>>> in /etc/udev/rules.d/60-symlinks.rules
>>> KERNEL=="event*",SYSFS{name}=="IR-receiver inside an USB DVB
>>> receiver",SYMLINK="input/irremote0"
>>> KERNEL=="event*",SYSFS{name}=="IR-receiver inside an USB DVB
>>> receiver",SYMLINK="input/irremote1"
>>> but I still only get a symlink on /dev/input/irremote1 for the second
>>> unworking device.
>>
>> You will have to find something that is really different between your 2
>> devices in order to sort them out properly.
>>
>> On my system I used the serial number.
>>
>> For exemple, the entry for my Nova-T-500 in lshal is looking like that:
>>
>>       udi = '/org/freedesktop/Hal/devices/usb_device_2040_9950_4028166400'
>>         info.linux.driver = 'usb'  (string)
>>         info.parent =
>> '/org/freedesktop/Hal/devices/usb_device_1d6b_2_0000_07_01_2'  (string)
>>         info.product = 'WinTV Nova-DT'  (string)
>>         info.subsystem = 'usb_device'  (string)
>>         info.udi =
>> '/org/freedesktop/Hal/devices/usb_device_2040_9950_4028166400'  (string)
>>         info.vendor = 'Hauppauge'  (string)
>>         linux.device_file = '/dev/bus/usb/010/002'  (string)
>>         linux.hotplug_type = 2  (0x2)  (int)
>>         linux.subsystem = 'usb'  (string)
>>         linux.sysfs_path =
>> '/sys/devices/pci0000:00/0000:00:1e.0/0000:07:01.2/usb10/10-1'  (string)
>>         usb_device.bus_number = 10  (0xa)  (int)
>>         usb_device.can_wake_up = true  (bool)
>>         usb_device.configuration_value = 1  (0x1)  (int)
>>         usb_device.device_class = 0  (0x0)  (int)
>>         usb_device.device_protocol = 0  (0x0)  (int)
>>         usb_device.device_revision_bcd = 256  (0x100)  (int)
>>         usb_device.device_subclass = 0  (0x0)  (int)
>>         usb_device.is_self_powered = false  (bool)
>>         usb_device.linux.device_number = 2  (0x2)  (int)
>>         usb_device.linux.sysfs_path =
>> '/sys/devices/pci0000:00/0000:00:1e.0/0000:07:01.2/usb10/10-1'  (string)
>>         usb_device.max_power = 500  (0x1f4)  (int)
>>         usb_device.num_configurations = 1  (0x1)  (int)
>>         usb_device.num_interfaces = 1  (0x1)  (int)
>>         usb_device.num_ports = 0  (0x0)  (int)
>>         usb_device.product = 'WinTV Nova-DT'  (string)
>>         usb_device.product_id = 39248  (0x9950)  (int)
>>         usb_device.serial = '4028166400'  (string)
>>         usb_device.speed = 480.0 (480) (double)
>>         usb_device.vendor = 'Hauppauge'  (string)
>>         usb_device.vendor_id = 8256  (0x2040)  (int)
>>         usb_device.version = 2.0 (2) (double)
>>
>> This is the initial device declaration, there are then more sections
>> about each sub-element (event, frontends, demux, etc...).
>>
>> I picked-up the card's serial number from that line, expecting it to be
>> unique enough within my system:
>>
>>       usb_device.serial = '4028166400'  (string)
>>
>> and turned it into this udev rule for the event interface:
>>
>>       KERNEL=="event*", ATTRS{serial}=="4028166400",
>> SYMLINK+="input/dvb-ir"
>>
>> Hope this helps.
>>
>> Nico
>
>
> I use a couple of pl2303 chip USB->serial adaptors to control my directv
> STB.  They do not have anything to distinguish one from the other, so I have
> to use the USB *port* they are plugged into to tell them apart:
>
> SUBSYSTEMS=="usb",KERNELS=="5-1:1.0",DRIVERS=="pl2303",SYMLINK+="hdpvrChannel0"
> SUBSYSTEMS=="usb",KERNELS=="5-2:1.0",DRIVERS=="pl2303",SYMLINK+="hdpvrChannel1"
>
> If nothing else works, you could try that.
>
> John
>
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>
Thanks guys, I managed to sort it and learn a lot more about udev
rules and device attributes here's the rule I ended using should
someone else find them in the same predicament
KERNEL=="event*",ATTRS{phys}=="usb-0000:04:07.2-1/ir0",SYMLINK="input/irremote"