On 18/02/08 11:24, Pierre Frenkiel wrote:
> Hi,
> After upgrading a Sony Vaio from SL4 to SL5, a strange (at least for me)
> behaviour appeared for the network interfaces, eth0 and eth1.  Normally,
> eth0 should be assigned to the wired interface, and eth1 to the wireless
> one. What happens now is that the 2 are swapped, i.e. eth0 is asigned to 
> the wireless interface...
> Even more strange: this happens apparently randomly, i.e. I get
> the right assignments about 1 time over 3.
[..]
> Has anybody a explanation?

Not really, just some things to look at:
* Check whether you have a BIOS option that will "hide" a device when 
not connected e.g. to a docking station.
* Check whether behaviour depends on booting with a connected network cable
* compare "lspci -vt" and "dmesg" output between two runs where the 
interfaces jumped around, just to see whether for Linux the hardware 
config has changed. Devices get detected one-by-one via a bus scan, this 
should give the hardware ID (e.g PCI ID) which then determines which 
driver to load. First driver to load gets eth0 etc. Some reshuffling 
later happens for devices with explicit MAC address.

Regards
jan