<div dir="ltr"><br><br><div class="gmail_quote">On Wed, Jan 5, 2011 at 2:58 PM, Tzafrir Cohen <span dir="ltr"><<a href="mailto:tzafrir@cohens.org.il">tzafrir@cohens.org.il</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div><div></div><div class="h5">On Wed, Jan 05, 2011 at 02:25:39PM +0200, Erez D wrote:<br>
> HI<br>
><br>
> I have 2 identical USB to Serial dongles<br>
><br>
> If I connect them to an XP box, i get assigned a COM port according to the<br>
> usb port i connected to<br>
> If I connect them to a Linux Box, i get assigned a ttyUSBn port according to<br>
> the order i connected them<br>
><br>
><br>
> as i am not always aware of the order i connect them, and it is not uniquly<br>
> defined if the are both connected at boot time,<br>
> I get the device name swapped every reboot.<br>
><br>
><br>
> is there a way to assign a constant device name according to the USB port it<br>
> is connected to and not via the order it is connected<br>
> (under linux of course)<br>
<br>
</div></div>Use the symlinks under /dev/serial/by-id rather than /dev/ttyUSBn<br>
directly.<br>
<br></blockquote><div>The problem is that the dongles are identical, so /dev/serial/by-id has only one file which links to the last one inserted.<br><br> /dev/serial/by-path has different links, however they are not consistent either, and change every time i remove and reinsert the dongle<br>
<br>
thanks,<br>
erez. <br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Or figure out how they are generated from the udev rules, and make your own<br>
custom constant device names. At first glance this is<br>
/lib/udev/rules.d/60-persistent-serial.rules on my system.<br>
<br>
--<br>
Tzafrir Cohen | <a href="mailto:tzafrir@jabber.org">tzafrir@jabber.org</a> | VIM is<br>
<a href="http://tzafrir.org.il" target="_blank">http://tzafrir.org.il</a> | | a Mutt's<br>
<a href="mailto:tzafrir@cohens.org.il">tzafrir@cohens.org.il</a> | | best<br>
<a href="mailto:tzafrir@debian.org">tzafrir@debian.org</a> | | friend<br>
<br>
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</blockquote></div><br></div>