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Groups > comp.os.linux.misc > #7651

Re: assigning specific /dev/videoN to specific USB webcams

From J G Miller <miller@yoyo.ORG>
Newsgroups comp.os.linux.misc
Subject Re: assigning specific /dev/videoN to specific USB webcams
Date 2013-03-25 02:34 +0000
Organization A noiseless patient Spider
Message-ID <kiod3l$ui1$3@dont-email.me> (permalink)
References <ki552n$nat$1@dont-email.me> <kinsh3$2ua$2@dont-email.me> <kio081$ui1$2@dont-email.me> <QdGdnbmTzt5LFtLMnZ2dnUVZ_o2dnZ2d@giganews.com>

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On Sunday, March 24th, 2013, at 18:27:18h -0500, Robert Heller advised:

> The scan of the PCI bus *ought* to be deterministic, based on slot
> numbers: from low to high or high to low.

Indeed so, as confirmed by the order of things in /var/log/udev

> Do these devices have some sort of unique id (like a serial number)?

If you look in /var/log/udev you will see things such as, on one machine

      /devices/pci0000:00/0000:00:0b.0

is where the SATA pci card is located

     /devices/pci0000:00/0000:00:0c.0

is where the DVB-t pci card is located, so as I suggested previously,
it could be possible if there were two cards of the same type at
00:0b and 00:0c to be differentied by this device to pci slot
identifier.

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Thread

assigning specific /dev/videoN to specific USB webcams J G Miller <miller@yoyo.ORG> - 2013-03-17 19:20 +0000
  Re: assigning specific /dev/videoN to specific USB webcams Robert Heller <heller@deepsoft.com> - 2013-03-17 14:46 -0500
    Re: assigning specific /dev/videoN to specific USB webcams J G Miller <miller@yoyo.ORG> - 2013-03-17 20:04 +0000
  Re: assigning specific /dev/videoN to specific USB webcams Kevin Snodgrass <kdsnodgrass@yahoo.com> - 2013-03-24 21:51 +0000
    Re: assigning specific /dev/videoN to specific USB webcams J G Miller <miller@yoyo.ORG> - 2013-03-24 22:54 +0000
      Re: assigning specific /dev/videoN to specific USB webcams Robert Heller <heller@deepsoft.com> - 2013-03-24 18:27 -0500
        Re: assigning specific /dev/videoN to specific USB webcams J G Miller <miller@yoyo.ORG> - 2013-03-25 02:34 +0000
      Re: assigning specific /dev/videoN to specific USB webcams Kevin Snodgrass <kdsnodgrass@yahoo.com> - 2013-03-31 18:16 +0000
        Re: assigning specific /dev/videoN to specific USB webcams J G Miller <miller@yoyo.ORG> - 2013-03-31 19:33 +0000
          Re: assigning specific /dev/videoN to specific USB webcams Kevin Snodgrass <kdsnodgrass@yahoo.com> - 2013-04-11 14:19 +0000
            Re: assigning specific /dev/videoN to specific USB webcams J G Miller <miller@yoyo.ORG> - 2013-04-11 15:21 +0000
  Re: assigning specific /dev/videoN to specific USB webcams Eric Pozharski <whynot@pozharski.name> - 2013-04-01 13:52 +0300
    Re: assigning specific /dev/videoN to specific USB webcams J G Miller <miller@yoyo.ORG> - 2013-04-01 18:24 +0000

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