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  1. #1

    Question cenos7.4 wireless networking not active after new install


    Not sure if this should go in the CenOS forum or the wireless/networking area.
    Sorry if wrong place. Please move Admin if you think it should be different.
    ----------------------

    Problem description

    I have installed CentOS7.4 on several laptops to play with.
    One is a Dell m4500, IBM think pad R61 and an HP probook 4540.

    All seem to have the same issue.

    For the purpose of this issue I will focus on the Dell M4500 to keep it simple. If there is such a thing

    I loaded clean from the DVD and during the OS load it saw the networking.
    I was able to enter in my SSID and my passcode etc.

    When the system rebooted to the final configuration screen it saw the wireless fine.

    Booted to multi user mode and no wireless when I logged in with either my ID or root.

    If I look at the /etc/sysconfig/network-scripts I see 2 listings for the wireless.


    fcfg-em1 ifdown-post ifup-ib ifup-TeamPort
    ifcfg-home ifdown-ppp ifup-ippp ifup-tunnel <<<<<<<
    ifcfg-home_1 ifdown-routes ifup-ipv6 ifup-wireless <<<<<< Not sure why there is 2 listings.

    ifcfg-lo ifdown-sit ifup-isdn ifup-wireless.orig
    ifdown ifdown-Team ifup-plip init.ipv6-global
    ifdown-bnep ifdown-TeamPort ifup-plusb keys-farscape
    ifdown-eth ifdown-tunnel ifup-post network-functions
    ifdown-ib ifup ifup-ppp network-functions-ipv6
    ifdown-ippp ifup-aliases ifup-routes
    ifdown-ipv6 ifup-bnep ifup-sit
    ifdown-isdn ifup-eth ifup-Team


    So it does appear to be there.

    When I go into network manager to try and use it NO wireless networks are found. It just spins and it were trying to find networks.

    Also I notice on the laptop the wireless light is off. It was on during the initial load.

    wlp3s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
    ether 00:24:d7:51:23:6c txqueuelen 1000 (Ethernet)
    RX packets 0 bytes 0 (0.0 B)
    RX errors 0 dropped 0 overruns 0 frame 0
    TX packets 0 bytes 0 (0.0 B)
    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0




    [root@labsystem1 ~]# ip link
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000
    link/ether 00:26:b9:c0:e0:3d brd ff:ff:ff:ff:ff:ff
    3: wlp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT qlen 1000
    link/ether 00:24:d7:51:23:6c brd ff:ff:ff:ff:ff:ff
    4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT qlen 1000
    link/ether 52:54:00:7d:35:34 brd ff:ff:ff:ff:ff:ff
    5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN mode DEFAULT qlen 1000
    link/ether 52:54:00:7d:35:34 brd ff:ff:ff:ff:ff:ff


    --------------------

    ip link set wlp3s0 up

    [root@labsystem1 ~]# nmcli general status
    STATE CONNECTIVITY WIFI-HW WIFI WWAN-HW WWAN
    connected full enabled enabled enabled enabled


    root@labsystem1 ~]# nmcli connection show
    NAME UUID TYPE DEVICE
    em1 f093f477-5952-45e7-8d4f-189b363f7921 802-3-ethernet em1
    virbr0 84fa57e0-3615-4d6d-b293-de8b1e69dadc bridge virbr0
    home 530f27fc-c2b5-420d-b82e-a674e462a2b0 802-11-wireless --
    home 1 7420d1a4-d562-4389-8443-9b4eb06129cb 802-11-wireless --


    root@labsystem1 ~]# rpm -q NetworkManager-wifi
    NetworkManager-wifi-1.8.0-11.el7_4.x86_64


    Several posts said that there could be an issue with network manager but I have unistalled and reinstalled it. Same issue.

    [root@labsystem1 ~]# nmcli --ask dev wifi connect home
    Error: No network with SSID 'home' found.

    root@labsystem1 ~]# dmesg | egrep -i "intel|wireless|iwlwifi|wlp3s0"
    [ 0.000000] ACPI: DMAR 00000000cf35ff18 00080 (v01 INTEL CP_DALE 00000001 INTL 00000001)
    [ 0.033068] smpboot: CPU0: Intel(R) Core(TM) i7 CPU M 620 @ 2.67GHz (fam: 06, model: 25, stepping: 05)
    [ 0.134863] Performance Events: PEBS fmt1+, 16-deep LBR, Westmere events, Intel PMU driver.
    [ 1.047252] intel_idle: MWAIT substates: 0x1120
    [ 1.047253] intel_idle: v0.4.1 model 0x25
    [ 1.047289] intel_idle: lapic_timer_reliable_states 0xffffffff
    [ 1.935291] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
    [ 1.935295] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
    [ 2.168678] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
    [ 31.085250] intel ips 0000:00:1f.6: CPU TDP doesn't match expected value (found 25, expected 29)
    [ 31.085414] intel ips 0000:00:1f.6: failed to get i915 symbols, graphics turbo disabled until i915 loads
    [ 31.085624] intel ips 0000:00:1f.6: IPS driver initialized, MCP temp limit 90
    [ 31.441564] Intel(R) Wireless WiFi driver for Linux
    [ 31.441567] Copyright(c) 2003- 2015 Intel Corporation
    [ 31.446360] iwlwifi 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
    [ 31.446434] iwlwifi 0000:03:00.0: irq 28 for MSI/MSI-X
    [ 31.455310] snd_hda_intel 0000:00:1b.0: irq 29 for MSI/MSI-X
    [ 31.455468] snd_hda_intel 0000:01:00.1: Disabling MSI
    [ 31.455480] snd_hda_intel 0000:01:00.1: Handle vga_switcheroo audio client
    [ 31.499683] input: HDA Intel MID Dock Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input9
    [ 31.499804] input: HDA Intel MID Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input10
    [ 31.499875] input: HDA Intel MID Dock Line Out as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11
    [ 31.499944] input: HDA Intel MID Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12
    [ 31.677481] iwlwifi 0000:03:00.0: loaded firmware version 9.221.4.1 build 25532 op_mode iwldvm
    [ 31.720359] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUG disabled
    [ 31.720364] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
    [ 31.720366] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TRACING disabled
    [ 31.720369] iwlwifi 0000:03:00.0: Detected Intel(R) Centrino(R) Ultimate-N 6300 AGN, REV=0x74
    [ 31.722025] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
    [ 32.141623] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
    [ 57.893574] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
    [ 57.900452] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
    [ 57.900555] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
    [ 58.124203] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
    [ 58.131076] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
    [ 58.131172] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
    [ 58.221995] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
    [ 235.039287] iwlwifi 0000:03:00.0: Device reached critical temperature - ucode going to sleep!
    [ 247.134359] iwlwifi 0000:03:00.0: Not sending command - CT KILL
    [ 3099.968684] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
    [ 3099.969139] iwlwifi 0000:03:00.0: Not sending command - CT KILL
    [ 3099.969146] iwlwifi 0000:03:00.0: Error clearing ASSOC_MSK on BSS (-5)
    [ 3099.985962] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
    [ 3099.992848] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
    [ 3099.992968] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
    [ 3100.214049] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
    [ 3100.220940] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
    [ 3100.221037] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
    [ 3100.311895] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
    [root@labsystem1 ~]#


    [root@labsystem1 ~]# systemctl status NetworkManager
    ● NetworkManager.service - Network Manager
    Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; disabled; vendor preset: enabled)
    Active: active (running) since Mon 2018-01-15 09:14:51 EST; 9min ago
    Docs: man:NetworkManager(
    Main PID: 5109 (NetworkManager)
    CGroup: /system.slice/NetworkManager.service
    ├─5109 /usr/sbin/NetworkManager --no-daemon
    └─5198 /sbin/dhclient -d -q -sf /usr/libexec/nm-dhcp-helper -pf /v...

    Jan 15 09:14:53 labsystem1 NetworkManager[5109]: <info> [1516025693.3579] d...'
    Jan 15 09:14:53 labsystem1 NetworkManager[5109]: <info> [1516025693.3579] d...'
    Jan 15 09:14:53 labsystem1 NetworkManager[5109]: <info> [1516025693.3580] d...d
    Jan 15 09:14:53 labsystem1 NetworkManager[5109]: <info> [1516025693.3595] d...]
    Jan 15 09:14:53 labsystem1 NetworkManager[5109]: <info> [1516025693.3603] d...]
    Jan 15 09:14:53 labsystem1 NetworkManager[5109]: <info> [1516025693.3627] d...]
    Jan 15 09:14:53 labsystem1 NetworkManager[5109]: <info> [1516025693.3631] m...E
    Jan 15 09:14:53 labsystem1 dhclient[5198]: bound to 10.1.10.18 -- renewal in....
    Jan 15 09:14:53 labsystem1 NetworkManager[5109]: <info> [1516025693.4086] d....
    Jan 15 09:14:53 labsystem1 NetworkManager[5109]: <info> [1516025693.4130] m...L
    Hint: Some lines were ellipsized, use -l to show in full.






    [root@labsystem1 ~]# lspci -nnk | grep -i net -A2
    00:19.0 Ethernet controller [0200]: Intel Corporation 82577LM Gigabit Network Connection [8086:10ea] (rev 05)
    Subsystem: Dell Device [1028:040c]
    Kernel driver in use: e1000e
    --
    03:00.0 Network controller [0280]: Intel Corporation Centrino Ultimate-N 6300 [8086:422b] (rev 35)
    Subsystem: Intel Corporation Centrino Ultimate-N 6300 3x3 AGN [8086:1121]
    Kernel driver in use: iwlwifi

    [root@labsystem1 ~]# rfkill list
    0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
    1: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no

    When I had Cenos6.9 on the systems there was no issue at all seeing the wireless.
    I know 7 is a completely new release . Just thought I would mention it.



    Let me know what other logs you would like to see.

    I appreciate you help on this matter.
    Thank you

  2. #2
    Linux Guru Segfault's Avatar
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    What version is this kernel. There is a patch.
    https://patchwork.kernel.org/patch/40042/

  3. #3
    I did a yum update on the laptop and there is no updates listed for anything. So it should be at latest level.

    I can check this evening as I am not in front of the computer at this time.

    That patch says it is from 2009. I would think it would be fixed by now.
    ????
    Last edited by unix1adm; 01-16-2018 at 02:32 PM.

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  5. #4
    Linux Guru Segfault's Avatar
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    Yes you would think, but this is the only issue I see in your logs, apart from ASPM warning. Considering the super conservative RHEL policy about upgrades I wouldn't be all surprised if this is your issue.

  6. #5
    Quote Originally Posted by Segfault View Post
    Yes you would think, but this is the only issue I see in your logs, apart from ASPM warning. Considering the super conservative RHEL policy about upgrades I wouldn't be all surprised if this is your issue.
    So basically as there is no fix for that bug I am out of luck at this time?

    Still does not make sense as it did see the wireless on initial build.

    This is the kernel info you requested.

    Linux labsystem1 3.10.0-693.11.6.el7.x86_64 #1 SMP Thu Jan 4 01:06:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

    -------------------

    EDIT UPDATE

    I do have another HP laptop that i seeing wireless and it is on 7.4

    This is the kernel info for that. if it helps.

    Linux LT102 3.10.0-693.11.6.el7.x86_64 #1 SMP Thu Jan 4 01:06:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
    Last edited by unix1adm; 01-17-2018 at 01:31 PM.

  7. #6
    Linux Guru Segfault's Avatar
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    I'm just guessing now. There was Meltdown fix applied to all kernels. The kernel on install CD didn't have this fix. So I'm thinking patching the kernel for Meltdown triggered some regression. Maybe there is a hardware issue, how about BIOS upgrades?
    In any case, I'd file a bug with CentOS.

  8. #7
    Ok both system have been patched to latest level. One works one does not. The IBM r60 still not working but Im focusing on the Dell at the moment.

    I'll get on the censo.org site and see about filing a bug as you suggested.

    It must me something disabling the hardware.

    My HP shows the wireless light on Dell does not. Makes me think the radio is off.
    I did try a clean install and same result with and without patching from the CD.
    During the install the Dell wireless light was on no problem.

  9. #8
    Linux Guru Segfault's Avatar
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    You can always roll your own kernel, you can even bisect if you are willing to spend some time on it.

  10. #9
    Well if you look up above this line :

    3: wlp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT qlen 1000

    So it tells me the wireless is down and wont let me activate it.
    not sure why. I tried to bring it up.
    ip link set wlp3s0 up

    But it fails. Sorry I dont recall the error I can get it later.

  11. #10
    Linux Guru Segfault's Avatar
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    -->
    Code:
    [ 235.039287] iwlwifi 0000:03:00.0: Device reached critical temperature - ucode going to sleep!
    This is your error. The device becomes disabled. No matter what you do after that it won't work.

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