Starting in Leopard, it appears these drivers are not always needed.
Specifically, users with USB-to-Ethernet adaptors based on the ASIX
AX88772 chip are finding their device matched by "AppleUSBEthernet"
even when our driver (USBAx8817x.kext) is installed. This is great
when it works, but several users are reporting their Ethernet adaptor
is failing to acquire a valid DHCP address (using a self assigned
169.254.x.x address instead).
Naturally, since some have installed our driver, they're writing
to me for help and I don't have a good answer.
QUESTIONS:
(1) Is it Apple's intention to support common USB-to-Ethernet adaptors
in Leopard? If so, what adaptors are supported?
Is there some common criteria by chipset, protocol, or other
identifier to determine what adaptors can be expected to work?
(2) What is the appropriate mechanism to match a user installed driver
such as our own in preference to AppleUSBEthernet?
In my own testing, AppleUSBEthernet does not appear to match the
LinkSys USB200M v1 (based on the AX8817x) on a MacBook (Nov 2007)
or iMac Core Duo with Leopard 10.5.1 . The same adaptor works
normally when our driver is installed.
I have two reports based on system.log entries showing
AppleUSBEthernet does match a LinkSys USB200M v2 based on
the AX88772 with Leopard 10.5.1 on a PPC.
I don't see AppleUSBEthernet in /System/Library/Extensions. Can
anyone confirm where it is located for checking version and
compatibility info.
Thanks for any pointers!
- Peter Sichel
Sustainable Softworks
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