~$ dmesg
...
 [ 3169.315929] usb 1-1: new high speed USB device using ehci_hcd and address 7
 [ 3169.473337] usb 1-1: configuration #1 chosen from 4 choices
 [ 3169.578831] ipheth 1-1:4.2: Apple iPhone USB Ethernet device attached
 [ 3170.699752] ipheth: ipheth_rx_submit: usb_submit_urb: -2



~$ lsusb
Bus 002 Device 002: ID 0e0f:0002 VMware, Inc. Virtual USB Hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 007: ID 05ac:1292 Apple, Inc. iPhone 3G
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



~$ sudo usbmuxd -f -v
[09:06:00.577][3] usbmuxd v1.0.4 starting up
[09:06:00.578][4] Creating socket
[09:06:00.578][4] Initializing USB
[09:06:00.578][4] 0 devices detected
[09:06:00.578][3] Initialization complete
[09:06:00.830][4] New client on fd 8
[09:06:11.529][4] New client on fd 9
[09:06:11.532][4] Caught SIGUSR1/2 but we weren't started in --udev mode, ignoring
[09:06:11.548][4] New client on fd 10
[09:06:11.597][4] Found new device with v/p 05ac:1292 at 1-4
[09:06:11.639][4] Using wMaxPacketSize=512 for device 1-4
[09:06:11.639][3] Connecting to new device on location 0x10004 as ID 1
[09:06:12.530][4] Client 9 connection closed
[09:06:12.531][4] Disconnecting client fd 9
[09:06:12.549][4] Client 10 connection closed
[09:06:12.549][4] Disconnecting client fd 10
[09:06:13.032][4] New client on fd 9
[09:06:14.033][4] Client 9 connection closed
[09:06:14.033][4] Disconnecting client fd 9
[09:06:14.534][4] New client on fd 9
[09:06:15.536][4] Client 9 connection closed
[09:06:15.536][4] Disconnecting client fd 9
[09:06:16.037][4] New client on fd 9
[09:06:17.039][4] Client 9 connection closed
[09:06:17.039][4] Disconnecting client fd 9
[09:06:17.540][4] New client on fd 9
[09:06:18.542][4] Client 9 connection closed
[09:06:18.542][4] Disconnecting client fd 9
[09:06:19.043][4] New client on fd 9
[09:06:20.044][4] Client 9 connection closed
[09:06:20.045][4] Disconnecting client fd 9
[09:06:20.545][4] New client on fd 9
[09:06:21.547][4] Client 9 connection closed
[09:06:21.547][4] Disconnecting client fd 9
[09:06:22.048][4] New client on fd 9
[09:06:23.050][4] Client 9 connection closed
[09:06:23.050][4] Disconnecting client fd 9
[09:06:23.551][4] New client on fd 9
[09:06:24.553][4] Client 9 connection closed
[09:06:24.553][4] Disconnecting client fd 9
[09:06:25.054][4] New client on fd 9
[09:06:26.056][4] Client 9 connection closed
[09:06:26.056][4] Disconnecting client fd 9
[09:06:26.557][4] New client on fd 9
[09:06:27.559][4] Client 9 connection closed
[09:06:27.559][4] Disconnecting client fd 9
[09:06:28.059][4] New client on fd 9
[09:06:29.061][4] Client 9 connection closed
[09:06:29.061][4] Disconnecting client fd 9
[09:06:29.562][4] New client on fd 9
[09:06:30.564][4] Client 9 connection closed
[09:06:30.564][4] Disconnecting client fd 9
[09:06:31.065][4] New client on fd 9
[09:06:32.067][4] Client 9 connection closed
[09:06:32.067][4] Disconnecting client fd 9
[09:06:32.568][4] New client on fd 9
[09:06:33.570][4] Client 9 connection closed
[09:06:33.570][4] Disconnecting client fd 9
[09:06:34.071][4] New client on fd 9
[09:06:35.072][4] Client 9 connection closed
[09:06:35.072][4] Disconnecting client fd 9
[09:06:35.573][4] New client on fd 9
[09:06:36.575][4] Client 9 connection closed
[09:06:36.575][4] Disconnecting client fd 9
[09:06:37.076][4] New client on fd 9
[09:06:38.077][4] Client 9 connection closed
[09:06:38.077][4] Disconnecting client fd 9
[09:06:38.578][4] New client on fd 9
[09:06:39.579][4] Client 9 connection closed
[09:06:39.579][4] Disconnecting client fd 9
[09:06:40.080][4] New client on fd 9
[09:06:41.082][4] Client 9 connection closed
[09:06:41.082][4] Disconnecting client fd 9

then no more message with -vvv
I have this extra lines :
[09:31:41.014][3] usbmuxd v1.0.4 starting up
[09:31:41.015][4] Creating socket
[09:31:41.015][5] client_init
[09:31:41.015][5] device_init
[09:31:41.015][4] Initializing USB
[09:31:41.015][5] usb_init for linux / libusb 1.0
[09:31:41.015][6] usb_discover: scanning 3 devices
[09:31:41.015][4] 0 devices detected
[09:31:41.015][3] Initialization complete
[09:31:41.151][4] New client on fd 8
[09:31:41.151][5] Client command in fd 8 len 16 ver 0 msg 3 tag 2
[09:31:41.151][5] send_pkt fd 8 tag 2 msg 1 payload_length 4
[09:31:41.151][5] Client 8 now LISTENING
[09:31:42.018][6] usb_discover: scanning 3 devices
[09:31:43.020][6] usb_discover: scanning 3 devices
[09:31:44.022][6] usb_discover: scanning 3 devices
[09:31:45.024][6] usb_discover: scanning 3 devices
[09:31:46.026][6] usb_discover: scanning 3 devices
[09:31:47.028][6] usb_discover: scanning 3 devices
[09:31:48.030][6] usb_discover: scanning 3 devices
[09:31:49.031][6] usb_discover: scanning 3 devices
[09:31:50.033][6] usb_discover: scanning 3 devices
[09:31:51.035][6] usb_discover: scanning 3 devices
[09:31:52.037][6] usb_discover: scanning 3 devices
[09:31:53.039][6] usb_discover: scanning 3 devices
[09:31:54.041][6] usb_discover: scanning 3 devices
[09:31:55.042][6] usb_discover: scanning 3 devices
[09:31:56.045][6] usb_discover: scanning 3 devices
[09:31:57.046][6] usb_discover: scanning 3 devices
[09:31:58.048][6] usb_discover: scanning 3 devices
[09:31:59.049][6] usb_discover: scanning 3 devices
[09:32:00.051][6] usb_discover: scanning 3 devices
[09:32:01.053][6] usb_discover: scanning 3 devices
[09:32:02.055][6] usb_discover: scanning 3 devices
[09:32:03.057][6] usb_discover: scanning 3 devices
[09:32:04.059][6] usb_discover: scanning 3 devices
[09:32:05.060][6] usb_discover: scanning 3 devices

>>> connect iphone.

[09:32:05.504][4] New client on fd 9
[09:32:05.504][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:05.504][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:05.504][5] Client 9 now LISTENING
[09:32:05.507][4] Caught SIGUSR1/2 but we weren't started in --udev mode, ignoring
[09:32:05.523][4] New client on fd 10
[09:32:05.523][5] Client command in fd 10 len 16 ver 0 msg 3 tag 2
[09:32:05.523][5] send_pkt fd 10 tag 2 msg 1 payload_length 4
[09:32:05.523][5] Client 10 now LISTENING
[09:32:06.063][6] usb_discover: scanning 4 devices
[09:32:06.063][4] Found new device with v/p 05ac:1292 at 1-6
[09:32:06.067][4] Using wMaxPacketSize=512 for device 1-6
[09:32:06.067][3] Connecting to new device on location 0x10006 as ID 1
[09:32:06.067][6] send_packet(1, 0x0, 0xbfaa1214, (nil), 0)
[09:32:06.506][4] Client 9 connection closed
[09:32:06.506][4] Disconnecting client fd 9
[09:32:06.524][4] Client 10 connection closed
[09:32:06.524][4] Disconnecting client fd 10
[09:32:07.007][4] New client on fd 9
[09:32:07.007][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:07.007][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:07.007][5] Client 9 now LISTENING
[09:32:07.068][6] usb_discover: scanning 4 devices
[09:32:08.007][4] Client 9 connection closed
[09:32:08.007][4] Disconnecting client fd 9
[09:32:08.068][6] usb_discover: scanning 4 devices
[09:32:08.508][4] New client on fd 9
[09:32:08.509][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:08.509][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:08.509][5] Client 9 now LISTENING
[09:32:09.070][6] usb_discover: scanning 4 devices
[09:32:09.510][4] Client 9 connection closed
[09:32:09.510][4] Disconnecting client fd 9
[09:32:10.011][4] New client on fd 9
[09:32:10.011][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:10.011][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:10.011][5] Client 9 now LISTENING
[09:32:10.070][6] usb_discover: scanning 4 devices
[09:32:11.012][4] Client 9 connection closed
[09:32:11.012][4] Disconnecting client fd 9
[09:32:11.071][6] usb_discover: scanning 4 devices
[09:32:11.513][4] New client on fd 9
[09:32:11.513][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:11.513][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:11.513][5] Client 9 now LISTENING
[09:32:12.073][6] usb_discover: scanning 4 devices
[09:32:12.515][4] Client 9 connection closed
[09:32:12.515][4] Disconnecting client fd 9
[09:32:13.016][4] New client on fd 9
[09:32:13.016][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:13.016][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:13.016][5] Client 9 now LISTENING
[09:32:13.073][6] usb_discover: scanning 4 devices
[09:32:14.018][4] Client 9 connection closed
[09:32:14.018][4] Disconnecting client fd 9
[09:32:14.073][6] usb_discover: scanning 4 devices
[09:32:14.519][4] New client on fd 9
[09:32:14.519][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:14.519][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:14.519][5] Client 9 now LISTENING
[09:32:15.075][6] usb_discover: scanning 4 devices
[09:32:15.520][4] Client 9 connection closed
[09:32:15.520][4] Disconnecting client fd 9
[09:32:16.021][4] New client on fd 9
[09:32:16.022][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:16.022][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:16.022][5] Client 9 now LISTENING
[09:32:16.075][6] usb_discover: scanning 4 devices
[09:32:17.023][4] Client 9 connection closed
[09:32:17.023][4] Disconnecting client fd 9
[09:32:17.076][6] usb_discover: scanning 4 devices
[09:32:17.524][4] New client on fd 9
[09:32:17.524][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:17.524][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:17.524][5] Client 9 now LISTENING
[09:32:18.077][6] usb_discover: scanning 4 devices
[09:32:18.526][4] Client 9 connection closed
[09:32:18.526][4] Disconnecting client fd 9
[09:32:19.027][4] New client on fd 9
[09:32:19.027][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:19.027][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:19.027][5] Client 9 now LISTENING
[09:32:19.077][6] usb_discover: scanning 4 devices
[09:32:20.029][4] Client 9 connection closed
[09:32:20.029][4] Disconnecting client fd 9
[09:32:20.078][6] usb_discover: scanning 4 devices
[09:32:20.530][4] New client on fd 9
[09:32:20.530][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:20.530][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:20.530][5] Client 9 now LISTENING
[09:32:21.080][6] usb_discover: scanning 4 devices
[09:32:21.532][4] Client 9 connection closed
[09:32:21.532][4] Disconnecting client fd 9
[09:32:22.033][4] New client on fd 9
[09:32:22.033][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:22.033][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:22.033][5] Client 9 now LISTENING
[09:32:22.081][6] usb_discover: scanning 4 devices
[09:32:23.034][4] Client 9 connection closed
[09:32:23.035][4] Disconnecting client fd 9
[09:32:23.082][6] usb_discover: scanning 4 devices
[09:32:23.536][4] New client on fd 9
[09:32:23.536][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:23.536][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:23.536][5] Client 9 now LISTENING
[09:32:24.084][6] usb_discover: scanning 4 devices
[09:32:24.537][4] Client 9 connection closed
[09:32:24.537][4] Disconnecting client fd 9
[09:32:25.038][4] New client on fd 9
[09:32:25.038][5] Client command in fd 9 len 16 ver 0 msg 3 tag 2
[09:32:25.038][5] send_pkt fd 9 tag 2 msg 1 payload_length 4
[09:32:25.038][5] Client 9 now LISTENING
[09:32:25.085][6] usb_discover: scanning 4 devices
[09:32:26.039][4] Client 9 connection closed
[09:32:26.039][4] Disconnecting client fd 9
[09:32:26.086][6] usb_discover: scanning 4 devices
^C[09:32:26.432][3] Caught signal 2, exiting
[09:32:26.432][4] Event processing interrupted
[09:32:26.432][3] usbmuxd shutting down
[09:32:26.432][5] device_kill_connections
[09:32:26.532][5] usb_shutdown
[09:32:26.532][3] Removed device 1 on location 0x10006
[09:32:26.532][5] usb_disconnect: cancelling RX xfer
[09:32:26.532][5] usb_disconnect: cancelling TX xfer 0x8fe1954
[09:32:26.532][6] RX callback dev 1-6 len 0 status 3
[09:32:26.532][5] Device 1-6 RX transfer cancelled
[09:32:26.532][6] TX callback dev 1-6 len 20 -> 0 status 3
[09:32:26.532][5] Device 1-6 TX transfer cancelled
[09:32:26.532][5] device_shutdown
[09:32:26.533][5] client_shutdown
[09:32:26.533][4] Disconnecting client fd 8
[09:32:26.533][3] Shutdown complete