On 23/12/17 08:14, YOSHINO Yoshihito wrote: > Hello, > > I use wpa_supplicant in Debian GNU/Linux unstable. > I have stuck in a problem with wpa_supplicant 2.6. After upgrading > wpa_supplicant from 2.4 to 2.6 my laptop (MacBook Air with wifi chip > "Broadcom Limited BCM4360 802.11ac Wireless Network Adapter > [14e4:43a0] (rev 03)", > with broadcom-sta's wl kernel module) fails to start scanning AP repeatedly > with the following (-ddd) messages: <snip> > This has been reported more than a year ago with wpa_supplicant version 2.5 to > Debian's bug report system: https://bugs.debian.org/833507 (wpasupplicant: > Unable to connect WLAN (wlan0: CTRL-EVENT-SCAN-FAILED ret=-22)). > > I have bisected commits between 2.4 and 2.6 and found the commit around 2.5-dev > https://w1.fi/cgit/hostap/commit/?id=ad4430971fb90cffe31c872e0e0e6cc8781048be > is the cause of the problem. > It looks like the current wl kernel module does not accept a Probe Request > frame with at least some part of the Extended Capabilities element. > > wpas_ext_capab_byte function in wpa_supplicant/wpa_supplicant.c unconditionally > sets WNM-related values. Disabling the code like this <snip> > Likewise a CONFIG_MBO block (several lines below the patch) would also need to > be disabled, which I have not tested yet because Debian's .config does not set > this option. > > While one of my collegues uses Lenovo Thinkpad laptop, with Intel's iwlwifi > kernel module, which works with normal wpa_supplicant 2.6 without any problems. > So it should switch depending on the kernel module used. > > I think one way to fix it would be to add some configuration variable for each > network (via ctrl_iface/dbus and/or in wpa_supplicant.conf(5)) to decide > whether it should emit WNM-related values or not and set the variable by hand > or an external program like NetworkManager depending on the kernel module the > network interface uses. > > Any ideas? I, too, would like to have this issue resolved. Jouni, what would you recommend as a temporary workaround? -- Cheers, Andrew _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
