Can't connect to WiFI after upgrade to 15.10, aka dreaded WPA2 Enterprise/PEAP nightmare

Question

Cannot connect to my school's WiFi network after an upgrade to Kubuntu 15.10

WPA2 Enterprise
PEAP 
no certificate

Network manager keeps asking for password (even though it has been supplied), but never connects.

I can connect via my Android phone

[connection]
id=Prof
uuid=2c64b06f-d391-47ed-987b-eae020c251b5
type=wifi
permissions=user:fx:;
secondaries=

[wifi]
mac-address-blacklist=
mode=infrastructure
seen-bssids=
ssid=Prof

[wifi-security]
group=
key-mgmt=wpa-eap
pairwise=
proto=

[802-1x]
altsubject-matches=
eap=peap;
identity=fpx
password-flags=1
phase2-altsubject-matches=
phase2-auth=mschapv2

[ipv4]
dns-search=
method=auto

[ipv6]
dns-search=
method=auto

So this is NOT the system-ca-cert=true problem- the line is absent

Any suggestions?

dmesg output :

[  319.869729] wlp2s0: authenticate with 9c:1c:12:2b:80:01
[  319.890789] wlp2s0: send auth to 9c:1c:12:2b:80:01 (try 1/3)
[  319.893335] wlp2s0: authenticated
[  319.897183] wlp2s0: associate with 9c:1c:12:2b:80:01 (try 1/3)
[  319.903786] wlp2s0: RX AssocResp from 9c:1c:12:2b:80:01 (capab=0x431 status=0 aid=1)
[  319.903880] wlp2s0: associated
[  344.003693] wlp2s0: deauthenticating from 9c:1c:12:2b:80:01 by local choice (Reason: 3=DEAUTH_LEAVING)
[  344.015722] cfg80211: World regulatory domain updated:
[  344.015727] cfg80211:  DFS Master region: unset
[  344.015728] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[  344.015732] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[  344.015735] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[  344.015738] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[  344.015741] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[  344.015745] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[  344.015747] cfg80211:   (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[  344.015750] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[  344.015753] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[  344.020244] cfg80211: Regulatory domain changed to country: IN
[  344.020248] cfg80211:  DFS Master region: JP
[  344.020249] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[  344.020252] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[  344.020255] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[  344.020257] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[  344.020258] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[  353.950765] wlp2s0: authenticate with 9c:1c:12:2b:80:01
[  353.971680] wlp2s0: send auth to 9c:1c:12:2b:80:01 (try 1/3)
[  353.977292] wlp2s0: authenticated
[  353.978218] wlp2s0: associate with 9c:1c:12:2b:80:01 (try 1/3)
[  353.983815] wlp2s0: RX AssocResp from 9c:1c:12:2b:80:01 (capab=0x431 status=0 aid=1)
[  353.983907] wlp2s0: associated

Answer 1

I had a similar issue. Currently the solution to this problem is to downgrade wpasupplicant:

After upgrade to 15.10 Wifi to a corporate network (WPA2) is not working anymore

echo "deb http://london.mirrors.linode.com/ubuntu/ vivid main" | sudo tee /etc/apt/sources.list.d/vivid.list
echo -e "Package: *\nPin: release o=Ubuntu,n=vivid\nPin-Priority: -1" | sudo tee cat /etc/apt/preferences.d/vivid
sudo apt-get update
sudo apt-get install wpasupplicant=2.1-0ubuntu7
sudo apt-mark hold wpasupplicant
sudo /etc/init.d/network-manager restart

I'm currently using the version 2.1.

wpa_supplicant -v
wpa_supplicant v2.1
Copyright (c) 2003-2014, Jouni Malinen <[email protected]> and contributors