I've lost WiFi on upgrading my Thinkpad T61 from Fedora-20/KDE to Fedora-21,
using fedup.
The WiFi card is Intel Corporation PRO/Wireless 4965 .
I have what I assume is the correct driver - iwl5965 (and iwlegacy) loaded,

When I run "sudo ip link show" the following interfaces are listed:
1: lo
2: enp0s25: 
3: wlp3s0: 
I take it the last means the WiFi card is seen?

But now I get
[tim@rose network-scripts]$ sudo ifconfig wlp3s0 up
SIOCSIFFLAGS: Operation not possible due to RF-kill
I'm not sure what this signifies?

[tim@rose network-scripts]$ sudo rfkill list
gives
1: phy0: Wireless LAN
        Soft blocked: yes
        Hard blocked: no

But after [tim@rose network-scripts]$ sudo rfkill unblock all
I can run
[tim@rose tmp]$ sudo ifconfig wlp3s0 up
without complaint.

Now ifconfig shows the interface,
but without the local IP address 
given in /etc/sysconfig/network-scripts/ifcfg-wlp3s0
Maybe NM no longer reads this file?

After
[tim@rose tmp]$ sudo ifconfig wlp3s0 192.168.2.3
ifconfig shows this correct local address.

But I am unable to connect to any other machine,
and the router does not log any attempted connectiion.

Any advice or elucidation gratefully received.

-- 
Timothy Murphy  
gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin

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