I think I found the solution to my problem here
http://askubuntu.com/questions/511255/intel-dual-band-wireless-ac-7260-keeps-dropping-wifi
Basically I needed to set the country for iw:
sudo iw reg set US
By this I passed from:
~$ iw reg get
country 00: DFS-UNSET
(2402 - 2472 @ 40), (3, 20)
(2457 - 2482 @ 40), (3, 20), NO-IR
(2474 - 2494 @ 20), (3, 20), NO-OFDM, NO-IR
(5170 - 5250 @ 40), (3, 20), NO-IR
(5735 - 5835 @ 40), (3, 20), NO-IR
to:
iw reg get
country US: DFS-UNSET
(2402 - 2472 @ 40), (3, 27)
(5170 - 5250 @ 40), (3, 17)
(5250 - 5330 @ 40), (3, 20), DFS
(5490 - 5600 @ 40), (3, 20), DFS
(5650 - 5710 @ 40), (3, 20), DFS
(5735 - 5835 @ 40), (3, 30)
(57240 - 63720 @ 2160), (N/A, 40)
Now my wifi is working fine.
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https://bugs.launchpad.net/bugs/1403142
Title:
[Lenovo Thinkpad X1 Carbon 2nd Gen 20A7,20A8] iwlwifi intel 7260
network does not connect
Status in linux package in Ubuntu:
Incomplete
Bug description:
Connection to the home and university wireless fail to connect. In the
terminal I see repeated messages "no association and the time is
already over". In contrast I can work and send this bug report through
the hot spot wireless of my cellphone with no problem. I checked many
bugs on the internet and tried many different things, none of those
succeeded. For instance, I tried kernel from the proposed repository,
I tried with multiple options of the iwlwifi module, I tried
installing new versions of the firmware.
03:00.0 Network controller [0280]: Intel Corporation Wireless 7260
[8086:08b2] (rev 83)
Subsystem: Intel Corporation Dual Band Wireless-AC 7260 [8086:c270]
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: linux-image-3.16.0-28-generic 3.16.0-28.37
ProcVersionSignature: Ubuntu 3.16.0-28.37-generic 3.16.7-ckt1
Uname: Linux 3.16.0-28-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: jsardid 2608 F.... pulseaudio
/dev/snd/controlC0: jsardid 2608 F.... pulseaudio
CurrentDesktop: KDE
Date: Tue Dec 16 11:49:01 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-12-12 (4 days ago)
InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: LENOVO 20A8S30G00
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-28-generic.efi.signed
root=UUID=15cbe5cb-55eb-4579-8e23-dd0b1aa46557 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.16.0-28-generic N/A
linux-backports-modules-3.16.0-28-generic N/A
linux-firmware 1.138
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/20/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GRET42WW (1.19 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20A8S30G00
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrGRET42WW(1.19):bd11/20/2014:svnLENOVO:pn20A8S30G00:pvrThinkPadX1Carbon2nd:rvnLENOVO:rn20A8S30G00:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20A8S30G00
dmi.product.version: ThinkPad X1 Carbon 2nd
dmi.sys.vendor: LENOVO
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