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I am setting up a new T450s with Intel AC 7265D wifi card. Windows 7 wif works perfectly. So, should not be a HW problem. But dual boot to 14.04 wifi didn't work after applying all kinds of work around found in this forum. I then upgraded to 15.10 with kernel upgrade to 4.2.6, applied latest firmware 15.227938.0 (it uses iwlwifi-7265D-15.ucode, the latest I could find) following chili555's step-by-step instruction. Still no wifi. Behavior is endless wifi authentication request. From dmesg output below, it seems that authentication is complete, but association with the router keeps failing. I wonder why they don't like each other. and what is preventing them from being associated...Any thoughts will be greatly appreciated!

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dmesg |grep wlan0
[    5.902703] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[    5.984403] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[    6.292143] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   33.086486] wlan0: authenticate with <router mac addr>
[   33.092328] wlan0: send auth to <router mac addr> (try 1/3)
[   33.180050] wlan0: authenticated
[   33.180218] iwlwifi 0000:03:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
[   33.180222] iwlwifi 0000:03:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
[   33.184143] wlan0: associate with <router mac addr> (try 1/3)
[   33.288048] wlan0: associate with <router mac addr> (try 2/3)
[   33.392015] wlan0: associate with <router mac addr> (try 3/3)
[   33.495959] wlan0: association with <router mac addr> timed out
.....

lshw -c network===============
-network
       description: Wireless interface
       product: Wireless 7265
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlan0
       version: 59
       serial: <mac addr>
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.2.6-040206-generic firmware=15.227938.0 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn
       resources: irq:50 memory:e1000000-e1001fff

lspci -nnk===========
03:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095b] (rev 59)
    Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5210]
    Kernel driver in use: iwlwifi
=====================================
Pilot6
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jfan
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  • Please add: dmesg | grep -e iwl -e DFS Welcome to askubuntu. – chili555 Nov 23 '15 at 21:51
  • Did you implement these steps? http://askubuntu.com/questions/633307/intel-ac7260-wifi-card-disconnects-and-have-to-restart/633957#633957 – chili555 Nov 23 '15 at 21:55
  • Hi chili555, yes I did go through this particular thread. Changing router setting to WPA2-AES didn't help. After the test, I fell it back to the original setting which is a combined mode WPA-PSK [TKIP] + WPA2-PSK [AES] (afraid it might impact my other device connections). It is an old netgear WT624 v3 wifi router with automatic 108M on channel 6 with US region setting. IPv6 was set to ignore; I just review this thread again and set regdomain=US; reboot, no improvement. $ dmesg |grep wlan0 [ 6.113363] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready – jfan Nov 25 '15 at 14:17
  • $ dmesg | grep -e iwl -e DFS [ 5.111778] iwlwifi 0000:03:00.0: loaded firmware version 15.227938.0 op_mode iwlmvm [ 5.136131] iwlwifi 0000:03:00.0: Detected Intel(R) Dual Band Wireless AC 7265, REV=0x210 [ 5.137370] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled [ 5.137806] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled [ 5.232012] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' [ 5.300413] cfg80211: DFS Master region: unset [ 1230.816492] iwlwifi 0000:03:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP – jfan Nov 25 '15 at 14:36
  • The driver iwlwifi doesn't like TKIP. Also, as you can see, the region is not US: " DFS Master region: unset" – chili555 Nov 25 '15 at 15:25
  • I removed the TKIP and rebooted router, no improvement yet. sudo iw reg set US and gksudo gedit /etc/default/crda set REGDOMAIN=US; DFS Master Region still shows unset...did I miss some steps to change DFS? – jfan Nov 25 '15 at 16:00
  • You might try a reboot and then check: dmesg | grep domain We hope we see: cfg80211: Regulatory domain changed to country: US – chili555 Nov 25 '15 at 17:02
  • Done that, grep domain shows "updated" but grep -e DFS still shows unset.. need to run into a meeting... will continue later this afternoon...thanks for your help...I am sure you will help me get to the end point – jfan Nov 25 '15 at 17:09
  • $ dmesg |grep domain ... [ 5.298324] cfg80211: World regulatory domain updated: But it is not like what we hoped to see (no "US" shown); when I check DFS region, it is still showing "unset" – jfan Nov 25 '15 at 20:19
  • Please check: cat /etc/default/crda Just show us the final line. – chili555 Nov 25 '15 at 20:50
  • final line shows REGDOMAIN= US (before there was no space in front of "US", then I added a space, still the same result.) – jfan Nov 25 '15 at 21:04
  • There should be no space. Then try: sudo iw reg set US and verify that it sticks: sudo iw reg get Note and post any errors or warnings. – chili555 Nov 25 '15 at 21:08
  • Removed space. no error on set US, but it doesn't seem to stick: sudo iw reg get country 00: DFS-UNSET (2402 - 2472 @ 40), (N/A, 20), (N/A) (2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR (5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR (5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR (57240 - 63720 @ 2160), (N/A, 0), (N/A) – jfan Nov 25 '15 at 21:17
  • Please try: sudo apt-get install --reinstall crda wireless-regdb and then: sudo apt-get install wireless-crda Reboot and check: sudo iw reg get – chili555 Nov 25 '15 at 21:43
  • $ sudo apt-get install --reinstall crda wireless-regdb Reading package lists... Done Building dependency tree
    Reading state information... Done 0 upgraded, 0 newly installed, 2 reinstalled, 0 to remove and 3 not upgraded. Need to get 0 B/68.8 kB of archives. After this operation, 0 B of additional disk space will be used. ng to unpack .../wireless-regdb_2014.11.18-1ubuntu1_all.deb ... Unpacking wireless-regdb (2014.11.18-1ubuntu1) over (2014.11.18-1ubuntu1) ... Processing triggers for man-db (2.7.4-1) ... Setting up wireless-regdb (2014.11.18-1ubuntu1) ... Setting up crda (3.13-1) ...     – jfan Nov 26 '15 at 01:12
  • $ sudo apt-get install --reinstall wireless-crda Reading package lists... Done Building dependency tree
    Reading state information... Done 0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 3 not upgraded. Need to get 0 B/2,664 B of archives. After this operation, 0 B of additional disk space will be used. (Reading database ... 209364 files and directories currently installed.) Preparing to unpack .../wireless-crda_1.16_amd64.deb ... Unpacking wireless-crda (1.16) over (1.16) ... Setting up wireless-crda (1.16) ...     – jfan Nov 26 '15 at 01:14
  • $ sudo iw reg set US jfan@james-PC:~$ sudo iw reg get country 00: DFS-UNSET (2402 - 2472 @ 40), (N/A, 20), (N/A) (2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR (5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR (5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR (57240 - 63720 @ 2160), (N/A, 0), (N/A) Looks like re-install didn't help, getting the same results as before re-install after reboot – jfan Nov 26 '15 at 01:16
  • Hi chili555, shall I try to remove and reinstall crda again or you think it is better to work on the kernel level (maybe fall back to the old 4.2.0)? Thanks! – jfan Nov 26 '15 at 18:15
  • tried removal and re-install crda and regdb, same result. Used live USB boot back to 14.04, was able to set iw reg to US, it sticks. However, wlan0 associate behavior is exactly the same timeout as in 15.10. Shall I look somewhere else for root cause? – jfan Nov 27 '15 at 17:14
  • Have you tried the live DVD or USB for Ubuntu 15.10? – chili555 Nov 30 '15 at 14:01
  • Yes. First tried USB boot for 15.10, it didn't stick the US setting. I then tried 14.04. Since it is USB boot, DFS setting won't register. iw reg get shows US. But association still fails in the same way. – jfan Nov 30 '15 at 14:07
  • Please try: sudo modprobe -r iwlwifi && sudo modprobe iwlwifi 11n_disable=1 As we see in dmesg, N speeds are not available from your router. – chili555 Nov 30 '15 at 15:43
  • I followed your command, is there a way to validate if the command stick? 11n is indeed disabled? – jfan Nov 30 '15 at 19:46
  • Please try: cat /sys/module/iwlwifi/parameters/11n_disable It ought to return 1. Is there any improvement in the ability to connect? – chili555 Nov 30 '15 at 21:53
  • The return of this command show 1 as expected. I also followed another link on the forum to set the following line in iwlwifi.conf with "options iwlwifi bt_coex_active=N swcrypto=1 11n_disable=1 (the only line in iwlwifi.conf. Reboot, association still fails the same way. no improvement – jfan Dec 01 '15 at 03:27
  • The file iwlwifi.conf should contain more than just that one line. The advice given in the other post is faulty. Please see: http://paste.ubuntu.com/13599878/ – chili555 Dec 01 '15 at 14:28
  • Here is my iwlwifi.conf file showing: cat /etc/modprobe.d/iwlwifi.conf

    /etc/modprobe.d/iwlwifi.conf

    iwlwifi will dyamically load either iwldvm or iwlmvm depending on the

    microcode file installed on the system. When removing iwlwifi, first

    remove the iwl?vm module and then iwlwifi.

    remove iwlwifi
    (/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod)
    && /sbin/modprobe -r mac80211 options iwlwifi ieee80211_regdom="US" options iwlwifi bt_coex_active=N swcrypto=1 11n_disable=1 did reboot. still no improvement

     – jfan Dec 01 '15 at 14:54
  • options iwlwifi ieee80211_regdom="US" is incorrect. Please remove. – chili555 Dec 01 '15 at 14:55
  • removed. cat /etc/modprobe.d/iwlwifi.conf

    /etc/modprobe.d/iwlwifi.conf

    iwlwifi will dyamically load either iwldvm or iwlmvm depending on the

    microcode file installed on the system. When removing iwlwifi, first

    remove the iwl?vm module and then iwlwifi.

    remove iwlwifi
    (/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod)
    && /sbin/modprobe -r mac80211 options iwlwifi bt_coex_active=N swcrypto=1 11n_disable=1 did reboot... same result no wifi yet

     – jfan Dec 01 '15 at 15:03
  • Now I ran the wireless-info script, is there a way to upload it for more analysis? it is too big for a comment reply – jfan Dec 09 '15 at 21:26
  • Please post it here and give us the link: http://paste.ubuntu.com – chili555 Dec 09 '15 at 22:46
  • thanks chili555 pasted at http://paste.ubuntu.com/13902277/ – jfan Dec 10 '15 at 19:01
  • I upgraded to 4.3 generic kernel and applied 7265-16 ucode firmware. still the same association time out. Is there a way to see what is exactly is failing? – jfan Dec 29 '15 at 15:49
  • May I see another wireless_script? http://paste.ubuntu.com Also, the logs may help us: dmesg | grep iwl and: cat /var/log/syslog | grep etwork | tail -n20 As the result will be lengthy, paste it as well and give us the links. – chili555 Dec 29 '15 at 20:50
  • new wireless-info script result pasted at http://paste.ubuntu.com/14282638/; command output pasted at http://paste.ubuntu.com/14282758/ – jfan Dec 30 '15 at 15:47

1 Answers1

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We see this in your wireless script in /etc/modprobe.d/iwlwifi.conf:

options iwlwifi bt_coex_active=N swcrypto=1 11n_disable=1 p2p_disabled=1

As you can see, p2p_disabled is not a valid parameter:

parm:           swcrypto:using crypto in software (default 0 [hardware]) (int)
parm:           11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
parm:           amsdu_size_8K:enable 8K amsdu size (default 0) (int)
parm:           fw_restart:restart firmware in case of error (default true) (bool)
parm:           antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
parm:           nvm_file:NVM file name (charp)
parm:           d0i3_disable:disable d0i3 functionality (default: Y) (bool)
parm:           lar_disable:disable LAR functionality (default: N) (bool)
parm:           uapsd_disable:disable U-APSD functionality (default: Y) (bool)
parm:           bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm:           led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
parm:           power_save:enable WiFi power management (default: disable) (bool)
parm:           power_level:default power save level (range from 1 - 5, default: 1) (int)
parm:           fw_monitor:firmware monitor - to debug FW (default: false - needs lots of memory) (bool)

I suggest that you do:

sudo gedit /etc/modprobe.d/iwlwifi.conf

Use nano or kate or leafpad if you don't have the text editor gedit. Change the last line to read:

options iwlwifi bt_coex_active=N swcrypto=1 11n_disable=1

Proofread carefully, save and close the text editor.

Next, I recommend that your regulatory domain be set explicitly. Check yours:

sudo iw reg get

If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:

sudo iw reg set IS

Of course, substitute your country code if not Iceland. Set it permanently:

gksudo gedit /etc/default/crda

Change the last line to read:

REGDOMAIN=IS

Proofread carefully, save and close the text editor.

Reboot and tell us if connectivity is improved.

You might try installing more recent firmware:

sudo apt-get update
sudo apt-get install git
git clone https://github.com/OpenELEC/iwlwifi-firmware.git
cd iwlwifi-firmware
sudo ./install

Reboot. Any improvement?

chili555
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  • The reg domain was 00. Tried to set to US, but it didn't stick. crda domain file has only one line: REGDOMAIN=US. These steps were tried before on kernel 4.2.6 last month. when I used USB to boot 15.10, reg domain was set to US (sticked), it didn't help with the wifi at the time. I'll reboot now and let you know. – jfan Dec 30 '15 at 16:50
  • Did reboot, no improvement; not sure why it has this error: [ 5.076352] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7265D-17.ucode failed with error -2; Is there a way to pre-disable HT and VHT? is the ipv6 ignore setting to disable WMM/QoS feature of the wireless card? – jfan Dec 30 '15 at 16:56
  • The firmware error is to indicate that the driver looked for and failed to find the -17 firmware. It went on to find an earlier firmware and loaded it. A Google search doesn't even locate any -17 firmware file. It may be called for in the driver so it will load when issued a few months (years??) from now. HT/VHT is disabled already by 11n_disable=1. Disabling IPv6 is to stop the driver/hardware looking for an IPv6 address when none is available from the router and/or your ISP. I will keep studying your logs. – chili555 Dec 30 '15 at 17:37
  • thanks very much for your time. I found this bug report: https://bugzilla.kernel.org/show_bug.cgi?id=96471. similar to mine. This caused me to put in the p2p disable options in (incorrectly). BTW, I also tried using iphone as AP, same behavior of failure to connect. This makes me think the issue is not on the AP. As both cases, it works when booted into windows7. It is somehow the association step got stuck. – jfan Dec 30 '15 at 17:56
  • Please see my edit above in a few minutes. – chili555 Dec 30 '15 at 17:58
  • tried to install following your instruction above, reboot shows the same association timeout. Don't see an improvement. – jfan Dec 30 '15 at 19:11
  • The firmware from git is only up to 15. I checked lshw showing still the 16.242414.0 was used as before the install – jfan Dec 30 '15 at 19:21