Peter Missel [off-list ref] :
[...]

It is now on 2.6.21.5 as downloaded from www.kernel.org, built for AMD64.	
Unfortunately, the problem is not gone. After suspend-to-disk and resume,
link speed is 100. Unplugging and replugging the cable does not help.
Unloading and reloading the driver module brings it back up to 1000.

Ok.

But now I should have a driver that supports mii_tool, right ?

Yes.

Since I cannot seem to find this tool available for download, could you
please give me a pointer, or mail me the source? 

Oops, mii-tool is not included in the net-tool package by Suse.

You can follow http://freshmeat.net/projects/mii-tool.

/me digs in the pending bugs mailbox...

Apparently there is no currently known version of the kernel/driver
whose behavior would be different, right ?

Can you try if it is enough to bring the link back to 1000 to:
- ifconfig down/up the adapter
- kick it with mii-tool

Whatever the result, it would be nice to test the latest patchkit which
will go into mainline (i.e. any of:
http://www.fr.zoreil.com/people/francois/misc/20070628-2.6.22-rc6-r8169-test.patch
http://www.fr.zoreil.com/linux/kernel/2.6.x/2.6.22-rc6/r8169-20070628/
)

The patch will not apply directly against 2.6.21.5. Is it an option for
you to try 2.6.22-rc6 or are you stuck with 2.6.21.5 ?

-- 
Ueimor