https://bugzilla.novell.com/show_bug.cgi?id=464912
User kasievers@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=464912#c9
Kay Sievers changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |WONTFIX
--- Comment #9 from Kay Sievers 2009-01-19 13:08:40 MST ---
There is not real recommendation I could make for the released version. You
would need to match with custom rules on different sysfs properties of
different devices to find the right port for the symlink, but there is no good
support for that in the current udev, unless you would use multiple rules
construct a match.
The udev version in openSUSE:Factory already has "stable links" for serial USB
devices like:
/dev/serial/
|-- by-id
| |-- usb-Palm_C ... Adaptor_00088798-if00-port0 -> ../../ttyUSB0
| `-- usb-Palm_C ... Adaptor_00088798-if00-port1 -> ../../ttyUSB1
`-- by-path
|-- pci-0000:00:1d.0-usb-0:2:1.0-port0 -> ../../ttyUSB0
`-- pci-0000:00:1d.0-usb-0:2:1.0-port1 -> ../../ttyUSB1
These links could be used to access the right device and the right port
reliably, if the application can be configured to use this path to the device,
instead of the /dev/pilot link.
I doubt the kernel changed the USB strings, that would have caused serious
trouble with many other devices, which I don't know of, it might be a different
issue.
In the past, we changed the pilot rules several times, until we dropped the
entire rule, because it only worked for a few people and even there it was
unreliable, because of the multiple ports match. The many available adapters
are all too different, and one would need to collect a database of
vendor/product matches to find the right port where the link needs to be
created for.
I'm closing this now, as I don't know of any reasonable workaround for the
current product, basically it's the same reason why we dropped the rule from
the distribution. Ihope, the upcoming /dev/serial/ links are helpful here, but
they are not in the released opensuse11.1 release.
Thanks for your attention and the report.
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