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Opened 6 years ago

Closed 6 years ago

Last modified 4 years ago

#11161 closed defect (fixed)

More impossible values in iwinfo

Reported by: Tobias Wolf <towolf@…> Owned by: developers
Priority: normal Milestone: Barrier Breaker 14.07
Component: packages Version: Trunk
Keywords: Cc:

Description

This looks very strange. The signal strength and the derived quality are impossible. I could repro with different HW and

root@plink:~# iwinfo wlan0 scannerinodelino | sed "s/..:..:..$/xx:xx:xx/;s/ESSID: .*/ESSID: somenet/"
Cell 01 - Address: 00:12:BF:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 2
          Signal: -30 dBm  Quality: 70/70
          Encryption: WPA PSK (TKIP)

Cell 02 - Address: 7C:4F:B5:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 6
          Signal: -42 dBm  Quality: 68/70
          Encryption: WPA2 PSK (CCMP)

Cell 03 - Address: C4:3D:C7:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 9
          Signal: -35 dBm  Quality: 70/70
          Encryption: none

Cell 04 - Address: BC:05:43:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 1
          Signal: -44 dBm  Quality: 66/70
          Encryption: mixed WPA/WPA2 PSK (TKIP, CCMP)

Cell 05 - Address: 7C:4F:B5:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 1
          Signal: -33 dBm  Quality: 70/70
          Encryption: mixed WPA/WPA2 PSK (TKIP, CCMP)

Cell 06 - Address: 00:24:FE:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 11
          Signal: -3 dBm  Quality: 70/70
          Encryption: mixed WPA/WPA2 PSK (TKIP, CCMP)

Cell 07 - Address: 00:1A:4F:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 11
          Signal: -47 dBm  Quality: 63/70
          Encryption: WPA2 PSK (CCMP)

Maybe a wrong data type again?

Also the subcommands accept anything and only the first character is looked at?

Attachments (0)

Change History (5)

comment:1 Changed 6 years ago by Tobias Wolf <towolf@…>

Here’s a different box, and a comparison with iw scan

root@ofcom:~# iw wlan0 scan | grep -i "C4:3D:C7:" -A6 | grep "BSS\|signal:" | sed "s/..:..:..$/xx:xx:xx/;s/ESSID: .*/ESSID: somenet/"
BSS c4:3d:c7:xx:xx:xx (on wlan0)
	signal: -60.00 dBm
root@ofcom:~# iw wlan0 scan | grep -i "C4:3D:C7:" -A6 | grep "BSS\|signal:" | sed "s/..:..:..$/xx:xx:xx/;s/ESSID: .*/ESSID: somenet/"
BSS c4:3d:c7:xx:xx:xx (on wlan0)
	signal: -58.00 dBm
root@ofcom:~# iw wlan0 scan | grep -i "C4:3D:C7:" -A6 | grep "BSS\|signal:" | sed "s/..:..:..$/xx:xx:xx/;s/ESSID: .*/ESSID: somenet/"
BSS c4:3d:c7:xx:xx:xx (on wlan0)
	signal: -60.00 dBm
root@ofcom:~# iwinfo wlan0 scan | grep C4:3D:C7 -A4 | sed "s/..:..:..$/xx:xx:xx/;s/ESSID: .*/ESSID: somenet/"
Cell 02 - Address: C4:3D:C7:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 9
          Signal: -18 dBm  Quality: 70/70
          Encryption: none
root@ofcom:~# iwinfo wlan0 scan | grep C4:3D:C7 -A4 | sed "s/..:..:..$/xx:xx:xx/;s/ESSID: .*/ESSID: somenet/"
Cell 02 - Address: C4:3D:C7:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 9
          Signal: -12 dBm  Quality: 70/70
          Encryption: none
root@ofcom:~# iwinfo wlan0 scan | grep C4:3D:C7 -A4 | sed "s/..:..:..$/xx:xx:xx/;s/ESSID: .*/ESSID: somenet/"
Cell 02 - Address: C4:3D:C7:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 9
          Signal: -18 dBm  Quality: 70/70
          Encryption: none
root@ofcom:~# iwinfo wlan0 scan | grep C4:3D:C7 -A4 | sed "s/..:..:..$/xx:xx:xx/;s/ESSID: .*/ESSID: somenet/"
Cell 02 - Address: C4:3D:C7:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 9
          Signal: -2 dBm  Quality: 70/70
          Encryption: none
root@ofcom:~# iwinfo wlan0 scan | grep C4:3D:C7 -A4 | sed "s/..:..:..$/xx:xx:xx/;s/ESSID: .*/ESSID: somenet/"
Cell 02 - Address: C4:3D:C7:xx:xx:xx
          ESSID: somenet
          Mode: Master  Channel: 9
          Signal: -20 dBm  Quality: 70/70
          Encryption: none

comment:2 Changed 6 years ago by andreas@…

I've got the same problem with AA r30920 on x86. I cannot get any noise-information on my AP. But I use linux-3.2.10 and had some adjustments in my kernel-config and that's why I was afraid to post. ;-)
However, I left the config for wifi untouched. Wifi is a 4318 (rev 02) using b43 via PCI. [Broadcom 4318 WLAN found (core revision 9)]

# iwinfo wlan0 info

wlan0     ESSID: "XXX"
          Access Point: 00:1F:C6:XX:XX:XX
          Mode: Master  Channel: 3 (2.422 GHz)
          Tx-Power: 20 dBm  Link Quality: 70/70
          Signal: -30 dBm  Noise: unknown
          Bit Rate: 48.0 MBit/s
          Encryption: mixed WPA/WPA2 PSK (TKIP, CCMP)
          Type: nl80211  HW Mode(s): 802.11bg
          Hardware: unknown [Generic MAC80211]
          TX power offset: unknown
          Frequency offset: unknown
          Supports VAPs: no

comment:3 Changed 6 years ago by jow

  • Resolution set to fixed
  • Status changed from new to closed

Should be fixed with r31053 - thanks for reporting.

comment:4 Changed 6 years ago by Tobias Wolf <towolf@…>

Thank you, jow. Confirmed fixed.

comment:5 Changed 4 years ago by jow

  • Milestone changed from Attitude Adjustment 12.09 to Barrier Breaker 14.07

Milestone Attitude Adjustment 12.09 deleted

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