em driver, 82574L chip, and possibly ASPM

[Sean Bruno]

On Tue, 2010-11-23 at 04:47 -0800, Ivan Voras wrote:
> It looks like I'm unfortunate enough to have to deploy on a machine 
> which has the 82574L Intel NIC chip on a Supermicro X8SIE-F board, which 
> apparently has hardware issues, according to this thread:
> 
> http://sourceforge.net/tracker/index.php?func=detail&aid=2908463&group_id=42302&atid=447449
> 
> One of the proposed workarounds is disabling "Active State Power 
> Management" in the BIOS and in the OS.
> 
> I have disabled it in BIOS but I don't know how to disable it in FreeBSD 
> (apparently only disabling it in BIOS isn't enough).
> 
> Any ideas on how to achieve the effect in FreeBSD?
> 
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Can I get an example pciconf -lv off of a couple of machines?  I've been
seeing some "issues" here at big purple that are similar.

Sean

mine:

igb0 at pci0:5:0:0:        class=0x020000 card=0x8975152d chip=0x10c98086
rev=0x01 hdr=0x00
    vendor     = 'Intel Corporation'
    class      = network
    subclass   = ethernet
igb1 at pci0:5:0:1:        class=0x020000 card=0x8975152d chip=0x10c98086
rev=0x01 hdr=0x00
    vendor     = 'Intel Corporation'
    class      = network
    subclass   = ethernet