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OpenBSD 4.7 and 4.8 on Lenovo G555 update - bringing alc0 to life

Posted by Steven_Rosenber on · 2 comments
Click; By Steven Rosenberg 		Mail this story
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While some users of the Lenovo G555 laptop and its Atheros AR8132 Ethernet interface report no trouble with networking in OpenBSD using the alc driver (courtesy of FreeBSD) that made its debut in version 4.7 of the operating system, that wasn't the case for me. The wired Ethernet interface shows up in the dmesg as alc0 but doesn't "light up."

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Comments (2)

tuxchick ·
I kept reading alc0 as alc0hol.
Steven_Rosenber Story submitter ·
This is one of those cases (Atheros AR8132) where Linux support was already there, but BSD support is relatively new. The alc driver was written for FreeBSD 8.0 (one release back) and ported to OpenBSD 4.7 (current release), so I expect there to be some quirks.

What happens, I think, is that this driver runs both a 10/100 NIC and a 10/100/1000 NIC, and the driver assumes that my particular NIC can run at 1000 MB even though it can't. Hence "forcing" 100 MB operation makes it work.

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