LinuxQuestions.org - [SOLVED] CentOS 7, Wifi is not working (Intel Centrino Wireless-N 135).

- CentOS (https://www.linuxquestions.org/questions/centos-111/)

- - CentOS 7, Wifi is not working (Intel Centrino Wireless-N 135). (https://www.linuxquestions.org/questions/centos-111/centos-7-wifi-is-not-working-intel-centrino-wireless-n-135-a-4175543308/)

CentOS 7, Wifi is not working (Intel Centrino Wireless-N 135).

"Unknown PCI device" in GUI Network Manager. I did reinstall driver. Wifi was working during install. I didn't install KDE Plasma.
Does anyone know please how to solve it ?

$ dmesg | egrep -i "intel|wireless|iwlwifi|wlp5s0"

Code:

[    0.000000] Reserving Intel graphics stolen memory at 0xcba00000-0xcf9fffff

[    0.037251] smpboot: CPU0: Intel(R) Core(TM) i7-3630QM CPU @ 2.40GHz (fam: 06, model: 3a, stepping: 09)

[    0.037277] Performance Events: PEBS fmt1+, 16-deep LBR, IvyBridge events, full-width counters, Intel PMU driver.

[    1.373625] intel_idle: MWAIT substates: 0x21120

[    1.373627] intel_idle: v0.4 model 0x3A

[    1.373628] intel_idle: lapic_timer_reliable_states 0xffffffff

[    1.445052] Intel P-state driver initializing.

[    1.445067] Intel pstate controlling: cpu 0

[    1.445080] Intel pstate controlling: cpu 1

[    1.445095] Intel pstate controlling: cpu 2

[    1.445108] Intel pstate controlling: cpu 3

[    1.445122] Intel pstate controlling: cpu 4

[    1.445137] Intel pstate controlling: cpu 5

[    1.445154] Intel pstate controlling: cpu 6

[    1.445168] Intel pstate controlling: cpu 7

[    2.929992] fbcon: inteldrmfb (fb0) is primary device

[    3.665586] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device

[    9.789681] Intel(R) Wireless WiFi driver for Linux, in-tree:

[    9.789684] Copyright(c) 2003- 2014 Intel Corporation

[    9.790125] iwlwifi 0000:05:00.0: can't disable ASPM; OS doesn't have ASPM control

[    9.790183] iwlwifi 0000:05:00.0: irq 47 for MSI/MSI-X

[    9.882472] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11

[  10.073012] iwlwifi 0000:05:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm

[  10.115917] iwlwifi 0000:05:00.0: CONFIG_IWLWIFI_DEBUG disabled

[  10.115920] iwlwifi 0000:05:00.0: CONFIG_IWLWIFI_DEBUGFS enabled

[  10.115921] iwlwifi 0000:05:00.0: CONFIG_IWLWIFI_DEVICE_TRACING disabled

[  10.115923] iwlwifi 0000:05:00.0: Detected Intel(R) Centrino(R) Wireless-N 135 BGN, REV=0x120

[  10.115970] iwlwifi 0000:05:00.0: L1 Disabled - LTR Disabled

[  10.154909] systemd-udevd[476]: renamed network interface wlan0 to wlp5s0

[  10.168872] intel_rapl: domain uncore energy ctr 14018:14018 not working, skip

[  10.399540] snd_hda_intel 0000:00:1b.0: irq 48 for MSI/MSI-X

[  10.426930] input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input10

[  10.427461] input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11

[  10.428085] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12

[  98.983713] iwlwifi 0000:05:00.0: L1 Disabled - LTR Disabled

[  98.991233] iwlwifi 0000:05:00.0: Radio type=0x0-0x0-0x0

[  99.051196] iwlwifi 0000:05:00.0: L1 Disabled - LTR Disabled

[  99.058712] iwlwifi 0000:05:00.0: Radio type=0x0-0x0-0x0

[  99.118659] IPv6: ADDRCONF(NETDEV_UP): wlp5s0: link is not ready

$ sudo systemctl status NetworkManager

Code:

NetworkManager.service - Network Manager

  Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled)

  Active: active (running) since Pá 2015-05-22 12:00:59 CEST; 3min 14s ago

 Main PID: 5088 (NetworkManager)

  CGroup: /system.slice/NetworkManager.service

          └─5088 /usr/sbin/NetworkManager --no-daemon



kvě 22 12:00:59 localhost.localdomain NetworkManager[5088]: <info>  (virbr0): Activation: Stage 5 of 5 (IPv4 Configure Commit) scheduled...

kvě 22 12:00:59 localhost.localdomain NetworkManager[5088]: <info>  (virbr0): Activation: Stage 3 of 5 (IP Configure Start) complete.

kvě 22 12:00:59 localhost.localdomain NetworkManager[5088]: <info>  (virbr0): Activation: Stage 5 of 5 (IPv4 Commit) started...

kvě 22 12:00:59 localhost.localdomain NetworkManager[5088]: <info>  (virbr0): device state change: ip-config -> ip-check (reason 'none') [70 80 0]

kvě 22 12:00:59 localhost.localdomain NetworkManager[5088]: <info>  (virbr0): Activation: Stage 5 of 5 (IPv4 Commit) complete.

kvě 22 12:00:59 localhost.localdomain NetworkManager[5088]: <info>  (virbr0): device state change: ip-check -> secondaries (reason 'none') [80 90 0]

kvě 22 12:00:59 localhost.localdomain NetworkManager[5088]: <info>  (virbr0): device state change: secondaries -> activated (reason 'none') [90 100 0]

kvě 22 12:00:59 localhost.localdomain NetworkManager[5088]: <info>  NetworkManager state is now CONNECTED_LOCAL

kvě 22 12:00:59 localhost.localdomain NetworkManager[5088]: <info>  (virbr0): Activation: successful, device activated.

kvě 22 12:01:05 localhost.localdomain NetworkManager[5088]: <info>  startup complete

$ sudo ip link

Code:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT 

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: enp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT qlen 1000

    link/ether 8c:89:a5:0b:e7:01 brd ff:ff:ff:ff:ff:ff

3: wlp5s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT qlen 1000

    link/ether 0c:d2:92:58:6d:a8 brd ff:ff:ff:ff:ff:ff

4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT 

    link/ether 52:54:00:4b:f9:f1 brd ff:ff:ff:ff:ff:ff

5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN mode DEFAULT qlen 500

    link/ether 52:54:00:4b:f9:f1 brd ff:ff:ff:ff:ff:ff

Hi...

Could you also give us the output for...

Code:

lspci -nnk | grep -i net -A2

Code:

rfkill list

Thanks! :)

I thank you :-)

$ lspci -nnk | grep -i net -A2

Code:

03:00.0 Ethernet controller [0200]: Qualcomm Atheros Killer E220x Gigabit Ethernet Controller [1969:e091] (rev 13)

        Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:10cd]

        Kernel driver in use: alx

05:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 135 [8086:0892] (rev c4)

        Subsystem: Intel Corporation Centrino Wireless-N 135 BGN [8086:0062]

        Kernel driver in use: iwlwifi

$ rfkill list

Code:

0: hci0: Bluetooth

        Soft blocked: no

        Hard blocked: no

1: phy0: Wireless LAN

        Soft blocked: no

        Hard blocked: no

Did you find the solution to this issue? I have the same problem

Quote:

Originally Posted by riyague (Post 5411710)

Did you find the solution to this issue? I have the same problem

Hi...

Welcome to the forum :)

I happened to find this thread from someone who had a similar problem. Not sure if the ideas there will help...

Regards...

Quote:

Originally Posted by riyague (Post 5411710)

Did you find the solution to this issue? I have the same problem

Hello, excuse my delay. Yes, I did find solution. I'm sorry, I don't remember how I've solved this issue. Do you need still know the solution ?

Quote:

Originally Posted by boycottsystemd (Post 5456792)

Hello, excuse my delay. Yes, I did find solution. I'm sorry, I don't remember how I've solved this issue. Do you need still know the solution ?

Hi...

If you can remember it, it might be helpful for a lot of folks. Also, if you would, please mark this thread as "SOLVED" be clicking on "Thread Tools" directly above your initial post. Thanks! :)

Regards...

Quote:

Originally Posted by ardvark71 (Post 5456810)

Hi,

I tried advices from many web pages, forums etc so it's hard to tell which has helped.

I've saved these web pages on disk:

Code:

HowTos_Laptops_NetworkManager - CentOS Wiki.html

Can I install rpm packages offline? - FedoraForum.org.html

[Solved][Intel Centrino N 135] Wifi not working.html

HowTos_Laptops_Wireless - CentOS Wiki.html

Setting up WiFi on Centos using CLI.html

Connecting Centos 6 Linux to a wifi network with a WEP key.html

I've found in .bash_history (lowest command was first):

Code:

sudo systemctl reload NetworkManager

sudo systemctl restart NetworkManager

sudo ip link set wlp5s0 up

sudo ip link show wlp5s0

sudo systemctl restart NetworkManager

sudo systemctl start network.service

sudo systemctl restart network.service

sudo systemctl reload NetworkManager

sudo systemctl restart NetworkManager

I had this problem. The solution was to install the package "NetworkManager-wifi". Seems obvious in retrospect. Lots of others seem to be stumped by this problem.

I'm not allowed to post a URL yet so I cannot tell you where on stackexchange I found the solution.