Please note: This project is no longer active. The website is kept online for historic purposes only.
If you´re looking for a Linux driver for your Atheros WLAN device, you should continue here .

Ticket #2090 (new defect)

Opened 14 years ago

Last modified 14 years ago

negative txpower allowed to be entered, causes weird readouts

Reported by: Assigned to:
Priority: minor Milestone:
Component: madwifi: driver Version:
Keywords: Cc:
Patch is attached: 0 Pending:


# iwconfig ath0 txpower -1

# iwlist ath0 tx
ath0      8 available transmit-powers :
          0 dBm         (1 mW)
          6 dBm         (3 mW)
          8 dBm         (6 mW)
          10 dBm        (10 mW)
          12 dBm        (15 mW)
          14 dBm        (25 mW)
          16 dBm        (39 mW)
          18 dBm        (63 mW)
          Current Tx-Power=32767 dBm    (-2147483648 mW)

# iwconfig ath0
ath0      IEEE 802.11b  ESSID:""  
          Mode:Master  Channel:0  Access Point: Not-Associated   
          Bit Rate:0 kb/s   Tx-Power=32766 dBm   Sensitivity=1/1  
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=0/70  Signal level=-256 dBm  Noise level=-256 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

The interface is not up. Clearly, input values should be screened for out-of-bounds errors on upside and downside.

# iwconfig --version
iwconfig  Wireless-Tools version 28
          Compatible with Wireless Extension v11 to v20.

Kernel    Currently compiled with Wireless Extension v19.

ath0      Recommend Wireless Extension v13 or later,
          Currently compiled with Wireless Extension v19.

# uname -a
Linux gateway

Change History

08/08/08 22:17:43 changed by anonymous

# iwconfig ath0 txpower 20
Error for wireless request "Set Tx Power" (8B26) :
    SET failed on device ath0 ; Invalid argument.

This is also contrary to the docs. TxPower? should be set to max available, not return invalid argument errors. But I would expect an invalid argument error on the <0 Tx Power settings