Description of problem: If authentication fails due to wpa_supplicant.conf containing conflicting credentials/AP data, wpa_supplicant should write to the log file. It is configured by default to write to /var/log/wpa_supplicant.log : $ ps -ef | grep -v grep | grep -i wpa root 18176 1 0 Jul18 ? 00:00:16 /usr/sbin/wpa_supplicant -u -f /var/log/wpa_supplicant.log -c /etc/wpa_supplicant.conf -P /run/wpa_supplicant.pid log file is empty: $ sudo wc -l /var/log/wpa_supplicant.log 0 /var/log/wpa_supplicant.log timestamp has been updated at system bootup: $ LC_ALL=C ls -al /var/log/wpa_supplicant.log -rw------- 1 root root 0 Jul 20 04:02 /var/log/wpa_supplicant.log Reproducible: Steps to Reproduce:
Hmmm, according to https://forums.gentoo.org/viewtopic-t-930204-start-0.html and and http://wiki.gentoo.org/wiki/Wpa_supplicant#Enable_Logging and comparing the man page to --help output, seems this is only for debug output. -f = log output to debug file instead of stdout From https://bugs.launchpad.net/ubuntu/+source/wpasupplicant/+bug/175970/comments/1 it seems to also log to syslog, to /var/log/wpa_supplicant: [doktor5000@Mageia4 ~]$ ls -ltr /var/log/wpa_supplicant* -rw------- 1 root root 5392 Aug 5 22:33 /var/log/wpa_supplicant.log.4.gz -rw------- 1 root root 2379 Aug 12 07:56 /var/log/wpa_supplicant.log.3.gz -rw------- 1 root root 1594 Aug 17 13:55 /var/log/wpa_supplicant.log.2.gz -rw------- 1 root root 0 Aug 19 04:02 /var/log/wpa_supplicant.log -rw------- 1 root root 248936 Aug 24 17:57 /var/log/wpa_supplicant.log.1
Status: NEW => RESOLVEDCC: (none) => doktor5000Resolution: (none) => INVALID