This was in fact due to NetworkManager hogging the dbus queue:
Aug 6 17:48:21 castiana NetworkManager[7344]: <warn> Couldn't disconnect
supplicant interface: The maximum number of pending replies per connection has
been reached.
Aug 6 17:48:21 castiana NetworkManager[7344]: <warn> Couldn't send AP scan
mode to the supplicant interface: The maximum number of pending replies per
connection has been reached.
Aug 6 17:48:21 castiana NetworkManager[7344]: <info> Activation
(wlan0/wireless): association request to the supplicant failed: (null) - The
maximum number of pending replies per connection has been reached
Aug 6 17:48:21 castiana NetworkManager[7344]: <info> (wlan0): device state
change: config -> failed (reason 'supplicant-failed') [50 120 10]
Aug 6 17:48:21 castiana NetworkManager[7344]: <warn> Activation (wlan0) failed
for access point (799-lan-gn)
Aug 6 17:48:21 castiana NetworkManager[7344]: <info> Marking connection
'799-lan-gn' invalid.
Aug 6 17:48:21 castiana NetworkManager[7344]: <warn> Activation (wlan0) failed.
Aug 6 17:48:21 castiana NetworkManager[7344]: <warn> Couldn't disconnect
supplicant interface: The maximum number of pending replies per connection has
been reached.
Aug 6 17:48:21 castiana NetworkManager[7344]: <info> (wlan0): device state
change: failed -> disconnected (reason 'none') [120 30 0]
Aug 6 17:48:21 castiana NetworkManager[7344]: <info> (wlan0): deactivating
device (reason 'none') [0]
** Changed in: wpasupplicant (Ubuntu)
Importance: Undecided => Critical
** Changed in: wpasupplicant (Ubuntu)
Status: Incomplete => In Progress
** Changed in: wpasupplicant (Ubuntu)
Assignee: (unassigned) => Mathieu Trudel-Lapierre (mathieu-tl)
** Summary changed:
- wpa_supplicant crashed with SIGSEGV in X509_verify_cert()
+ supplicant fails due to issues speaking to dbus (max pending requests)
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https://bugs.launchpad.net/bugs/1033600
Title:
supplicant fails due to issues speaking to dbus (max pending requests)
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