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    SubjectRe: mcp55 forcedeth woes
    (suitable cc's added)

    On Mon, 13 Apr 2009 15:13:05 -0700 (PDT)
    "Yan Seiner" <yan@seiner.com> wrote:

    > 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?
    >



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