Title: Re: Ethernet port not detected but a new ethernet port is
At 2:29 PM +0200 2/25/2011, nick telis wrote:
MDD 1.42
2 GHz ram
OS 10.5.8
Ethernet connected to a Lynksys WRT160 N router with dd-wrt installed

I upgraded to OS 10.5 in January. Prior to then all was well with my setup.

Now a new problem has appeared this week. Just about every time I reboot I loose my ethernet settings. When I open Network preferences it shows Ethernet Status "Not Connected" and I get the message "A new ethernet port has been detected" and it labeled ethernet 2.

System Preferences > Security > Check "require password to unlock each secure system pref".  See if that makes a diff.
Try a different ethernet cable.  Try a different port on the router.   (thinking the continuity is intermittent, so the port is not configuring or sync'ing properly).

I can not configure the old port ( I can put in all the info but it will not connect) although I can configure the new port.
After I configure the new port, I delete the old ethernet setting and rename the new setting "ethernet" (eliminating the number 2). This works and I can connect to the internet.

Confusing.  Are you meaning port - as in a port on the router, or do you mean configured interface in your Mac?   You do not have a separate ethernet card, correct?

Every time I change the network preferences TimeMachine loses it's disk settings. I get this error:
Volume at path /Volumes/Brizo does not appear to be the correct backup volume for this computer.  (Cookies do not match)
_CSBackupGetMachineMACAddress - IOServiceGetMatchingServices did not find an ethernet service with kIOPrimaryInterface true
Backup failed with error: 18

Yea, TM is upset because the MAC is changing.  The MAC is the ethernet's hardware address.  Turn off TM until you get this resolved.

I have run AppleJack, reset the PMU, Reset the PRAM (not necessarily in that order)

Reasonable.  Maybe swap out your pram battery too.
I have ordered a new DiskWarrior upgrade, but it hasn't arrived yet.

What's the point?  What does this error have to do with your file system?  Kindof like buying a new car engine because you have a flat tire.  Disk Utility says the volume is clean?

I've searched the Apple support forum and the web and cannot come up with a solution.

Yea, not a normal issue.  Seen it before tho - each time it was due to failing/intermittent hardware.  Sometimes it was the NIC on the motherboard dying (soln is to install an ethernet card).  Mostly it's funky ethernet cables or a dying port on the switch or router.

T'would be interesting to see your whole system.log.  Zip and email to me if you would please.  But do not post such a big thing to the whole list.

heh.  It would rock if that one security setting change fix it tho...

HTH,
- Dan.
-- 
- Psychoceramic Emeritus; South Jersey, USA, Earth.



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