Hello Carolyn,
On Wednesday, 6. April 2011 00:27:16 you wrote:
> That's an interesting sounding issue. You said that you couldn't
> reproduce it with another switch. What kind of switch are you using?
Thanks for your reply.
The "problematic" switch is a Netgear Prosafe GS724AT, the working one
is a cheap D-Link DGS-1008D.
> When trying another one, was it a different one in make/model or just a
> different one of the same make/model. When you unplug and plug the
> cable back the adapter is reset and reconfigured to defaults, although
> it should be that way after a reboot as well and it shouldn't be
> different from one reboot to the other unless some other interaction
> with the os is the problem.
As you can see above, it's a different brand/model. We have more of those
Netgear switches in productive use, I could try pluging it into another.
But let's have a look at the register dumps first.
> Some other information that would be helpful: output of lspci -vvv and
> also lspci -tvvv, both when the problem is occurring and when it is not.
> Can you download ethregs from SourceForge or update your ethtool to the
> latest and give me a register dump both before and during the problem.
>
> If you open an issue with Source Forge, it gives us a place to post data
> and track info.
The tests were made with kernel 2.6.39-rc1 and ethtool git from today.
As the file is really small, I've attached it to the mail.
The lspci output stayed the same during all tests, so I just
included one pair of it.
Test runs:
Working -> Broken -> Working-after-broken.
I also did a very quick diff between the register dumps and please note
it's the first time I every looked at such a dump, this one caught my eye:
Working:
0x00018: MDIC (MDI control) 0x182A3800
Broken:
0x00018: MDIC (MDI control) 0x182A78FF
The other changed stuff looks like counters to me...
Hope that helps,
Thomas Jarosch
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