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From: "Antanas Uršulis" <antanas@cantab.net>
To: linux-wireless@vger.kernel.org
Subject: Re: [linuxwifi] Intel Centrino Ultimate N 6300 regression
Date: Thu, 22 Aug 2019 23:42:16 +0100	[thread overview]
Message-ID: <90e4da8a-10a6-2e2d-c3de-27f21e644f3e@cantab.net> (raw)
In-Reply-To: <CAG6aBkW09YFz4asHZkhWBUenBiT3dgb7iGXBCq8KkCM09QXjLg@mail.gmail.com>

I was investigating what appears to be the same issue on my T420 
Thinkpad and at least found a workaround (and perhaps a clue for where 
the bug could lie).

On 22/08/2019 01:12, Nigel Sollars wrote:
> Interesting to be sure,  so here are the versions of kernel and wpa_supplicant,
> 
> 5.2.9-200.fc30.x86_64
> wpa_supplicant-2.8-2.fc30.x86_64

Are you using NetworkManager by chance? I stumbled across a Red Hat bug 
report[0] involving 'CTRL-EVENT-SCAN-FAILED ret=-22' and the proprietary 
broadcom driver. A comment there[1] describes a workaround for their 
issue, by making NetworkManager not randomise the MAC address during 
access point scans.

Adopting that workaround also works for my Centrino Ultimate-N 6300 (rev 
3e). Create a config file /etc/NetworkManager/conf.d/iwl.conf with contents:

[device]
match-device=driver:iwlwifi
wifi.scan-rand-mac-address=no

Then restart NetworkManager. Alternatively, downgrading wpa_supplicant 
(to 2.7-r3 on Gentoo ~amd64) also works for me.

- Antanas

[0] https://bugzilla.redhat.com/show_bug.cgi?id=1703745
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1703745#c56

      parent reply	other threads:[~2019-08-22 22:50 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAG6aBkWDyGDtWX7X0t-FjynkYxpdhpZsAv4Ysw3dKf+iEu+mig@mail.gmail.com>
     [not found] ` <5d4c34ea.1c69fb81.a7a36.5f7f.GMR@mx.google.com>
2019-08-08 19:58   ` Fwd: Delivery Status Notification (Failure) Nigel Sollars
     [not found] ` <941b807b02962fadaf738942baf1621738872723.camel@intel.com>
2019-08-21 14:30   ` [linuxwifi] Intel Centrino Ultimate N 6300 regression Nigel Sollars
2019-08-21 21:45     ` Alexander Wetzel
2019-08-22  0:12       ` Nigel Sollars
2019-08-22 22:42     ` Antanas Uršulis [this message]

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