Re: Detecting 5GHz wireless networks

[Dan Williams <dcbw redhat com>]

On Tue, 2008-05-20 at 12:53 -0600, Dann Church wrote:
> I am running Fedora 9 with NetworkManager-0.7.0-0.9.3.svn3623 on a
> laptop with a Intel 4965AGN wireless card.
> 
> With this setup, I can connect to networks on the 2.4GHz frequencies
> just fine.  However, I have (both at work and at home) a wireless router
> that are dual-band and have unique SSIDs for the 5GHz bands, and cannot
> connect with NetworkManager to the AP using these frequencies.

This thread on linux-wireless might have something to do with it:

iwl4965 - wpa_supplicant can't see 5Ghz frequencies - 2.6.26-rc1 kernel

The bug isn't just on 2.6.26 AFAIK.

Dan

> >From iwlist scan, I see:
> 
> wlan0     Scan completed :
>           Cell 01 - Address: <my AP mac here>
>                     ESSID:"dd-wrt-5G"
>                     Mode:Master
>                     Frequency:5.18 GHz (Channel 36)
>                     Channel:36
>                     Quality=49/100  Signal level=-79 dBm  Noise
> level=-127 dBm
>                     Encryption key:on
>                     IE: IEEE 802.11i/WPA2 Version 1
>                         Group Cipher : CCMP
>                         Pairwise Ciphers (1) : CCMP
>                         Authentication Suites (1) : PSK
>                     Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
>                               36 Mb/s; 48 Mb/s; 54 Mb/s
>                     Extra:tsf=foo
> 
> which clearly shows the frequency/channel info, but in nm-tool:
> 
> - Device: wlan0
> ----------------------------------------------------------------
>   Type:              802.11 Wireless
>   Driver:            iwl4965
>   State:             disconnected
>   HW Address:        <my wireless card MAC>
> 
>   Capabilities:
>     Supported:       yes
> 
>   Wireless Settings
>     WEP Encryption:  yes
>     WPA Encryption:  yes
>     WPA2 Encryption: yes
> 
>   Wireless Access Points
>     dd-wrt-5G:       Infra, <my AP mac here>, Freq 0 MHz, Rate 0 Mb/s,
> Strength 55 WPA2
> 
> In /var/log/wpa_supplicant.log, I just see:
> 
> Trying to associate with <my AP mac here> (SSID='dd-wrt-5G' freq=0 MHz)
> Authentication with <my AP mac here> timed out.
> 
> In /var/log/messages, I have:
> 
> May 20 12:46:37 superfly NetworkManager: <info>  Activation (wlan0)
> Stage 1 of 5 (Device Prepare) scheduled...
> May 20 12:46:37 superfly NetworkManager: <info>  Activation (wlan0)
> Stage 1 of 5 (Device Prepare) started...
> May 20 12:46:37 superfly NetworkManager: <info>  (wlan0): device state
> change: 6 -> 4
> May 20 12:46:37 superfly NetworkManager: <info>  Activation (wlan0)
> Stage 2 of 5 (Device Configure) scheduled...
> May 20 12:46:37 superfly NetworkManager: <info>  Activation (wlan0)
> Stage 1 of 5 (Device Prepare) complete.
> May 20 12:46:37 superfly NetworkManager: <info>  Activation (wlan0)
> Stage 2 of 5 (Device Configure) starting...
> May 20 12:46:37 superfly NetworkManager: <info>  (wlan0): device state
> change: 4 -> 5
> May 20 12:46:37 superfly NetworkManager: <info>  Activation
> (wlan0/wireless): connection 'dd-wrt-5G' has security, and secrets
> exist.  No new secrets needed.
> May 20 12:46:37 superfly NetworkManager: <info>  Config: added 'ssid'
> value 'dd-wrt-5G'
> May 20 12:46:37 superfly NetworkManager: <info>  Config: added
> 'scan_ssid' value '1'
> May 20 12:46:37 superfly NetworkManager: <info>  Config: added
> 'key_mgmt' value 'WPA-PSK'
> May 20 12:46:37 superfly NetworkManager: <info>  Config: added 'psk'
> value '<omitted>'
> May 20 12:46:37 superfly NetworkManager: <info>  Config: added 'proto'
> value 'WPA RSN'
> May 20 12:46:37 superfly NetworkManager: <info>  Config: added
> 'pairwise' value 'TKIP CCMP'
> May 20 12:46:37 superfly NetworkManager: <info>  Config: added 'group'
> value 'WEP40 WEP104 TKIP CCMP'
> May 20 12:46:37 superfly NetworkManager: <info>  Activation (wlan0)
> Stage 2 of 5 (Device Configure) complete.
> May 20 12:46:37 superfly NetworkManager: <info>  Config: set interface
> ap_scan to 1
> May 20 12:46:37 superfly NetworkManager: <info>  (wlan0): supplicant
> connection state change: 0 -> 2
> May 20 12:46:39 superfly NetworkManager: <info>  (wlan0): supplicant
> connection state change: 2 -> 3
> May 20 12:46:54 superfly NetworkManager: <info>  (wlan0): supplicant
> connection state change: 3 -> 0
> May 20 12:46:54 superfly NetworkManager: <info>  (wlan0): supplicant
> connection state change: 0 -> 2
> May 20 12:47:02 superfly NetworkManager: <info>  Activation
> (wlan0/wireless): association took too long.
> 
> 
> Any debugging to do to see why we're not seeing the frequency?  Also, is
> this the reason we're not getting a successful association with the AP?
> 
>