em0 dead after suspend/restore on t40

[Peter Schuller]

> on a t40 running -current, i will often, but not always, see
>
>     em0: Link is up 1000 Mbps Full Duplex
>     ...
>     em0: The EEPROM Checksum Is Not Valid
>     em0: Unable to initialize the hardware
>     em0: The EEPROM Checksum Is Not Valid
>     em0: Unable to initialize the hardware
>
> on a resume.  after a reboot,

I don't know if it's related or not, but I have had similar problems on my 
T40p. Firstly, I get that EEPROM problem whenever the cardbus bridge is 
enabled. Disabling cardbus made that particular problem go away completely.

However I still had problems with suspend/resume and I submitted a PR/patch 
that fixes it on my machine: 

   http://www.freebsd.org/cgi/query-pr.cgi?pr=i386/59806

Perhaps the two problems are related? My problem with suspend/resume can also 
be said to happen "often" but not always. When em0 dies I tend to get 
watchdog warnings, and often even a kernel panic as mentioned in the PR.

(I'm thinking perhaps the two problems are caused by the same thing but result 
in different error messages in our two situations.)

-- 
/ Peter Schuller, InfiDyne Technologies HB

PGP userID: 0xE9758B7D or 'Peter Schuller <peter.schuller at infidyne.com>'
Key retrieval: Send an E-Mail to getpgpkey at scode.org
E-Mail: peter.schuller at infidyne.com Web: http://www.scode.org