Ok, I'm out of ideas on this one. On my laptop, I always had an issue with eth0; during boot, I got a warning "no configuration found for eth0, assuming dhcp" despite the fact that in /etc/conf.d/net I had config_eth0=( "dhcp" ). (btw, the same config has always worked fine in any other computer, ie no warnings). That has been like that for ages, but I did not care too much since in the end what I wanted for eth0 was dhcp, and that is what I was getting anyway, and I never bothered to find out more (yes, I should have).
Now I don't want to start eth0 at boot anymore (only wlan0), so I commented out the config_eth0=( "dhcp" ) in /etc/conf.d/net, and did a rc-update del net.eth0 default (which correctly deleted net.eth0 from the default runlevel). Sure enough, net.eth0 is not part of any runlevel now: # rc-update -a show acpid | default bootmisc | boot checkfs | boot checkroot | boot clock | boot consolefont | boot hdparm | default hostname | boot iptables | default keymaps | boot local | default nonetwork localmount | boot modules | boot net.lo | boot netmount | default net.tap100 | default net.wlan0 | default rmnologin | boot splash | default sshd | default sysklogd | default urandom | boot vixie-cron | default xfs | default Nonetheless, at boot I keep getting the "no configuration found for eth0, assuming dhcp" warning, and it stubbornly tries to bring up eth0 using dhcp. As far as I can tell, no other initscript depends on net.eth0 (but I may not be looking in the right place). Any ideas? Thank you.