fail to get response from remote running Ubuntu Karmic

[Martin-Éric Racine]

Binary package hint: mtr

When pinging a remote host running Karmic alpha using 'mtr', I get no response if tracing by hostname:

$ mtr geode.lan

Keys: Help Display mode Restart statistics Order of fields quit
                                                                                    Packets Pings
 Host Loss% Snt Last Avg Best Wrst StDev

In other words, resolving that particular host fails using 'mtr'.

However, if I try to ping using the IPv4 address, it works:

$ mtr 172.16.1.1

Keys: Help Display mode Restart statistics Order of fields quit
                                                                                    Packets Pings
 Host Loss% Snt Last Avg Best Wrst StDev
 1. geode.lan 0.0% 5 3.6 1.5 0.8 3.6 1.2

Disabling IPv6 support on my router suddenly makes host "geode" respond to 'mtr' pings again.

As if to make things more complicated, using 'ping' to probe the same host works:

$ ping -c 3 geode.lan
PING geode.lan (172.16.1.1) 56(84) bytes of data.
64 bytes from geode.lan (172.16.1.1): icmp_seq=1 ttl=64 time=0.725 ms
64 bytes from geode.lan (172.16.1.1): icmp_seq=2 ttl=64 time=0.784 ms
64 bytes from geode.lan (172.16.1.1): icmp_seq=3 ttl=64 time=0.764 ms

--- geode.lan ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.725/0.757/0.784/0.040 ms

Using 'mtr' on any other host on this subnet (OpenWRT, Debian/Squeeze, Ubuntu/Jaunty) returns a normal result.

ProblemType: Bug
Architecture: i386
Dependencies:
 libgcc1 1:4.3.3-5ubuntu4
 gcc-4.3-base 4.3.3-5ubuntu4
 findutils 4.4.0-2ubuntu4
 libncurses5 5.7+20090207-1ubuntu1
 libc6 2.9-4ubuntu6
DistroRelease: Ubuntu 9.04
Package: mtr-tiny 0.75-2
ProcEnviron:
 PATH=(custom, user)
 LANG=fi_FI.UTF-8
 SHELL=/bin/bash
SourcePackage: mtr
Uname: Linux 2.6.30-020630-generic i686