Wifi doesn't work after 4.0.1-1 kernel update

Hi. I use 64bits archlinux, today I've updated linux from 3.18.6 to 4.0.1 and then my wifi card cannot connect to my net, network manager asks me for my password (although the password is obviously well typed). Downgrading linux to 3.18.6 solves the problem and internet connection works 'out of the box' as ever worked
I've compared dmesg and journalctl between both, 3.18.6 and 4.0.1 kernels.
dmesg-4.0.1: http://pastebin.com/ZyMvnmKm
journalctl-4.0.1: http://pastebin.com/r0r5Hd4z
dmesg-3.18.6: http://pastebin.com/1f18z9rh
journalctl-3.18.6: http://pastebin.com/HZkFASGw
I've found a warning in journalctl in 4.0.1 kernel that could be related with my problem
abr 30 14:58:51 surface NetworkManager[276]: <warn> Connection disconnected (reason 15)
However I'm really not sure what it means, any help would be very appreciated
PD: my machine is a Surface Pro and its wifi card has TONS of problems in linux, see https://bugs.archlinux.org/task/44269 and https://bugzilla.kernel.org/show_bug.cgi?id=69661 . However I believe that this problem is not related with those older bugs

David, there is no 'reason 15' in my journalctl.
However, for linux 3.19.3, there is 4-way handshake completed messages:
May 02 14:42:58 Archenlighter NetworkManager[340]: <info> (wlo1): supplicant interface state: associating -> 4-way handshake
May 02 14:42:58 Archenlighter NetworkManager[340]: <info> (wlo1): supplicant interface state: 4-way handshake -> completed
May 02 14:58:51 Archenlighter NetworkManager[354]: <info> (wlo1): supplicant interface state: associating -> 4-way handshake
May 02 14:58:51 Archenlighter NetworkManager[354]: <info> (wlo1): supplicant interface state: 4-way handshake -> completed
May 02 18:20:12 Archenlighter NetworkManager[354]: <info> (wlo1): supplicant interface state: associated -> 4-way handshake
May 02 18:20:13 Archenlighter NetworkManager[354]: <info> (wlo1): supplicant interface state: 4-way handshake -> completed
But during the time linux 4.0.1 kernel was active there is no 4-way handshake message, however I found the following messages in journalctl during the time linux 4.0.1 kernel was in play:
May 02 14:52:49 Archenlighter avahi-daemon[336]: Leaving mDNS multicast group on interface wlo1.IPv4 with address 192.168.137.100.
May 02 14:52:49 Archenlighter wpa_supplicant[381]: wlo1: CTRL-EVENT-DISCONNECTED bssid=ec:f3:5b:3b:14:4a reason=3 locally_generated=1
May 02 14:52:49 Archenlighter kernel: wl0: link down (wlo1)
May 02 14:52:49 Archenlighter wpa_supplicant[381]: nl80211: deinit ifname=wlo1 disabled_11b_rates=0
May 02 14:52:49 Archenlighter wpa_supplicant[381]: wlo1: CTRL-EVENT-TERMINATING
May 02 14:52:49 Archenlighter NetworkManager[340]: <info> (wlo1): device state change: activated -> deactivating (reason 'removed') [100 110 36]
May 02 14:52:50 Archenlighter NetworkManager[340]: <info> (wlo1): device state change: deactivating -> unmanaged (reason 'removed') [110 10 36]
May 02 14:52:50 Archenlighter NetworkManager[340]: <info> (wlo1): deactivating device (reason 'removed') [36]
May 02 14:52:50 Archenlighter NetworkManager[340]: <info> (wlo1): canceled DHCP transaction, DHCP client pid 396
May 02 14:52:50 Archenlighter NetworkManager[340]: <info> (wlo1): DHCPv4 state changed bound -> done
May 02 14:52:50 Archenlighter kernel: IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
May 02 14:58:38 Archenlighter kernel: wl 0000:0d:00.0 wlo1: renamed from wlan0
Thanks David for suggesting this!
Thanks head_on_a_stick, i've updated it.
Last edited by enlighter (2015-05-06 07:11:16)

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