Re: NetworkManager not listing access points

[Dan Williams <dcbw@redhat.com>]

On Wed, 2013-09-18 at 22:47 +0200, Detlev Casanova wrote:
> Hello,
> 
> After a bisection on the kernel, it seems that a patch is causing a 
> problem with NetworkManager: 
> 
> commit 0172bb75073e11a5aa9d8a953bdaefb8709f00c8 ("cfg80211: 
> use DS or HT operation IEs to determine BSS channel")
> 
> The Wifi access points are not listed in the KDE plasma widget and it 
> won't even connect to the saved ones even if they are in range.
> 
> There is a fix though: running "iwlist wlan0 scan" twice as root (which 
> properly lists APs in reach) and the second time must be run about two 
> seconds after the first time.
> 
> Then NetworkManager lists the access points and connects to the 
> prefered one if possible (normal behavior).
> 
> This also happens with nm-applet in Gnome.
> 
> The hardware is: 14e4:4315 (Network controller: Broadcom Corporation 
> BCM4312 802.11b/g LP-PHY (rev 01)) on an Intel Core i3 M370 CPU (64 
> bits) computer.
> 
> The abnormal behaviour is not random, it happens every time.

Can you run wpa_supplicant with debugging output?  The quick and dirty
way is to:

mv /usr/sbin/wpa_supplicant /
killall -TERM wpa_supplicant
/wpa_supplicant -dddtu

and then wait for the problem to happen, and grab the log output for us
to analyze.

Dan