ということで調べてみたら、Multicast DNSの実装がこれだったのか。MacBook Airの発熱がちときついので不要なプロセスは削除するですよ、ということでavahi-autoipdとlibavahi-*を必要ないので削除、と思ったらekigaも削除されてしまうでないの。ekigaが依存していたのか…。仕方が無いので、ライブラリ関連は削除するのを勘弁してやった。

$ sudo apt-get remove --purge avahi-autoipd
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libdaemon0 libc-ares2 app-install-data libcurl3-gnutls libetpan13
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
0 upgraded, 0 newly installed, 1 to remove and 1 not upgraded.
After this operation, 197kB disk space will be freed.
Do you want to continue [Y/n]?
(Reading database ... 107727 files and directories currently installed.)
Removing avahi-autoipd ...
Missing interface name.
Purging configuration files for avahi-autoipd ...
Processing triggers for man-db ...


$ ps -ef
104       5330     1  0 21:32 ?        00:00:00 avahi-autoipd: [wlan0] sleeping
root      5331  5330  0 21:32 ?        00:00:00 avahi-autoipd: [wlan0] callout dispatcher