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
