I have the same error on a clean install.
lspci:
01:06.0 Ethernet controller: Atheros Communications, Inc. AR5212 802.11abg NIC
(rev 01)
iwconfig:
ath0 IEEE 802.11g ESSID:"VE"
Mode:Managed Frequency:2.437 GHz Access Point: Not-Associated
Bit Rate:0 kb/s Tx-Power:18 dBm Sensitivity=0/3
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=0/94 Signal level=-95 dBm Noise level=-95 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
[EMAIL PROTECTED]:~$ sudo iwconfig ath0 mode master
Error for wireless request "Set Mode" (8B06) :
SET failed on device ath0 ; Invalid argument.
[EMAIL PROTECTED]:~$ sudo iwconfig ath0 mode Master
Error for wireless request "Set Mode" (8B06) :
SET failed on device ath0 ; Invalid argument.
I have D-Link DWL520 Rev. B3.
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Cannot set modes other than 'Managed' on Atheros based wifi card
https://launchpad.net/bugs/62106
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