Cfrgtkky

Our wifi password at work recently changed.
I edited the old connection to have to new password by

$ nmcli connection edit "Internet"

$ set wifi-sec.psk <password>

$ save persistent

$ activate

Everything was fine for about five minutes. but after that the connection went down. I can re start it but it continues to go down every 1-5 minutes or so (I had to restart wifi four times while typing this question). I sometimes get an error message when trying to restart the connection but even when the error occurs the connection will successfully restart.

$ nmcli connection up "Internet" 

Passwords or encryption keys are required to access the wireless network 'Internet'.

Warning: password for '802-11-wireless-security.psk' not given in 'passwd-file' and nmcli cannot ask without '--ask' option.

Error: Connection activation failed.

I've tried resetting the password for the connection again, and removing and recreating the connection all with the same results.

Is this an nmcli issue or a driver issue or something else?

Computer is a Dell Latitude E6230,
Ubuntu version is 16.04.3,
lshw gives:

description: Wireless interface

       product: Centrino Advanced-N 6205 [Taylor Peak]

       vendor: Intel Corporation

       physical id: 0

       bus info: pci@0000:02:00.0

       logical name: wlp2s0

       version: 34

       serial: 84:3a:4b:9c:b5:f0

       width: 64 bits

       clock: 33MHz

       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless

       configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-112-generic firmware=18.168.6.1 ip=192.168.xx.xx latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn

       resources: irq:31 memory:f7d00000-f7d01fff

iwconfig gives:

wlp2s0    IEEE



 802.11abgn  ESSID:"Our Internet"  

          Mode:Managed  Frequency:5.785 GHz  Access Point: 70:8B:CD:CD:6A:04   

          Bit Rate=216 Mb/s   Tx-Power=15 dBm   

          Retry short limit:7   RTS thr:off   Fragment thr:off

          Power Management:on

          Link Quality=47/70  Signal level=-63 dBm  

          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0

          Tx excessive retries:13  Invalid misc:101   Missed beacon:0

iwlist scan gives:

wlp2s0    Scan completed :

          Cell 01 - Address: 70:8B:CD:CD:6A:04

                    Channel:157

                    Frequency:5.785 GHz

                    Quality=45/70  Signal level=-65 dBm  

                    Encryption key:on

                    ESSID:"Our Internet"

                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s

                              36 Mb/s; 48 Mb/s; 54 Mb/s

                    Mode:Master

                    Extra:tsf=00000027b06e54a4

                    Extra: Last beacon: 48164ms ago

                    IE: Unknown: 000C4F757220496E7465726E6574

                    IE: Unknown: 01088C129824B048606C

                    IE: IEEE 802.11i/WPA2 Version 1

                        Group Cipher : CCMP

                        Pairwise Ciphers (1) : CCMP

                        Authentication Suites (1) : PSK

                    IE: Unknown: 2D1AEF0917FFFFFF0000000000000000000000000000000000000000

                    IE: Unknown: 3D169D0D1500000000000000000000000000000000000000

                    IE: Unknown: 7F080000000000000040

                    IE: Unknown: BF0CB259820FEAFF0000EAFF0000

                    IE: Unknown: C005019B000000

                    IE: Unknown: C30402020202

                    IE: Unknown: DD09001018020E001C0000

                    IE: Unknown: DD180050F2020101840003A4000027A4000042435E0062322F00

I had a similar problem. It solved when I restarted the NetworkManager.

In my system:

systemctl restart NetworkManager

Maybe it's some kind of password caching. I hope it helps