Messages in this thread | | | Date | Mon, 13 Apr 2009 15:13:05 -0700 (PDT) | Subject | mcp55 forcedeth woes | From | "Yan Seiner" <> |
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I have a few Asus M2N-SLI deluxe mobos. These mobos have the MCP55 chipset and two 1gb ethernet ports. Occasionally, and for no reason that I can figure out, these ports will die. There are various ways to try and fix these; they seem to be about 50% effective, and approach something akin to voodoo.
Based on this discussion here:
http://patchwork.kernel.org/patch/16212/
I've gotten the ability to turn the ports on and off somewhat.
For port 0,
ethtool -s eth0 autoneg off speed 10 duplex full
turns on the link, and gets me half-duplex, 10mb/sec. Not much, granted.
ethtool -s eth0 autoneg off speed 100 duplex full
causes the link to go up and down on about a 2 second cycle.
ethtool -s eth0 autoneg on
causes the link to drop.
For port 1, the behavior is similar, except that I can get a stable 100 mbit connection.
So the problem is in the autoneg code. It's a driver issue as this is reported widely to work under windows of various flavors.
I'm running 2.6.29.1; I'm ok with patching and building kernels, but I'm not a kernel hacker.
What, if anything, can I provide and do to fix this?
-- Yan Seiner, PE
Support my bid for the 4J School Board http://www.seiner.com
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