This also affects kernel 5.4.0-58-generic.
** Also affects: linux-meta (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1909494
Title:
wpa_supplicant and iwlwifi failing with "No buffer space available"
since "kernel 5.4.0-56"
Status in backport-iwlwifi-dkms package in Ubuntu:
Confirmed
Status in linux-meta package in Ubuntu:
Confirmed
Status in wpasupplicant package in Ubuntu:
Confirmed
Bug description:
There are reproduce-able WiFi aborts with 20.04.1 LTS since update to
kernel 5.4.0-56.
Behaviour: nm-applet shows a window to enter the WLAN key that is pre-
filled. Hitting the "Connect" button reconnects the WiFi network for a
small period.
The error occurs sometimes very often (e.g. 10 times/minute) or seldom
(only one per day). You can see it in /var/log/syslog at the entry
>>> wpa_supplicant[xxx]: l2_packet_send - sendto: No buffer space
available
As a result 4-Way-Handshake fails and after disconnection the new (old) key
is requested.
>>> wpa_supplicant[xxx]: wlp3s0: WPA: 4-Way Handshake failed - pre-shared key
may be incorrect
>>> NetworkManager[xxx]: <info> [xxx] device (wlp3s0): Activation: (wifi)
disconnected during association, asking for new key
There are a lot of people having this problem (see discussion in german
moderated forum:
>>>
https://forum.ubuntuusers.de/topic/funknetz-schluessel-werden-staendig-abgefragt
See also BUG #1908823 and question #694566
>>>
https://bugs.launchpad.net/ubuntu/+source/network-manager-applet/+bug/1908823
>>> https://answers.launchpad.net/ubuntu/+question/694566
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