$ kdesu wlassistant
X Error: BadDevice, invalid or uninitialized input device 168
  Major opcode:  145
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 168
  Major opcode:  145
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 168
  Major opcode:  145
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 168
  Major opcode:  145
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 168
  Major opcode:  145
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 168
  Major opcode:  145
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
kbuildsycoca running...
Loaded application options.
DHCP Client: dhclient
All executables found.
iwconfig_status: /sbin/iwconfig
==>stderr: lo        no wireless extensions.

sit0      no wireless extensions.

Wireless interface(s): wlan0
Permissions checked.
ifconfig_status: /sbin/ifconfig wlan0
scan: /sbin/iwlist wlan0 scan
Networks found: 3
Checking for active connection.
Trying to get gateway address...
...from /var/lib/dhcp3/dhclient.leases
Gateway address: 192.168.0.1
ACTION: CONNECT.
kill_dhcp: /sbin/dhclient -r wlan0
==>stderr: There is already a pid file /var/run/dhclient.pid with pid 134993416
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listen
ing on LPF/wlan0/[...]
Sending on   LPF/wlan0/[...]
Sending on   Socket/fallback
DHCPRELEASE on wlan0 to 192.168.0.1 port 67
send_packet: Network is unreachable
send_packet: please consult README file regarding broadcast address.
i
fup: /sbin/ifconfig wlan0 up
iwconfig_set: /sbin/iwconfig wlan0 mode managed channel 8 key open [...] essid [...]
iwconfig_ap: /sbin/iwconfig wlan0 ap [...]
ifconfig_dhcp: /sbin/dhclient -q wlan0
==>stderr: There is already a pid file /var/run/dhclient.pid with pid 134993416
kill_dhcp: /sbin/dhclient -r wlan0
==>stderr: There is already a pid file /var/run/dhclient.pid with pid 7563
killed old client process, removed PID file
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please vi
sit http://www.isc.org/sw/dhcp/

Listening on LPF/wlan0/[...]
Sending on   LPF/wlan0/[...]
Sending on   Socket/fallback
DHCPRELEASE on wlan0 to 192.168.0.1 port 67
CONNECTION FAILED.
Application options saved.
Kernel socket closed.

$ sudo dhclient
There is already a pid file /var/run/dhclient.pid with pid 0
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/wlan0/[...]
Sending on   LPF/wlan0/[...]
Sending on   Socket/fallback
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3
DHCPOFFER from 192.168.0.1
DHCPREQUEST on wlan0 to 255.255.255.255 port 67
DHCPACK from 192.168.0.1
bound to 192.168.0.6 -- renewal in 108376 seconds.