[Solved] Validated on a Lenovo Thinkpad T520 using a 6205 wifi card
$ lspci | grep 6205
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor
Peak] (rev 34)
Just add a file for iwlwifi options in /etc/modprobe.d (1 line) -
filename can be anything:
$ cat /etc/modprobe.d/fred.conf
options iwlwifi 11n_disable=1
Reboot after adding this file !
I prefer not to modify /etc/modprobe.d/iwlwifi.conf, as this file is
owned by package kmod, and can be modified at anytime.
I tried many times, wifi connection is restored in a 1 second. wifi
connection seems much stable.
Tried on Ubuntu Gnome 16.04 and Mint 18.
By the way, many posts are available on the internet about this issue,
and a lot of options are suggested. I recall that "modinfo -p" gives the
options available for a module:
$ sudo modinfo -p iwlwifi
swcrypto:using crypto in software (default 0 [hardware]) (int)
11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4:
disable agg RX, 8 enable agg TX (uint)
amsdu_size_8K:enable 8K amsdu size (default 0) (int)
fw_restart:restart firmware in case of error (default true) (bool)
antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
nvm_file:NVM file name (charp)
d0i3_disable:disable d0i3 functionality (default: Y) (bool)
lar_disable:disable LAR functionality (default: N) (bool)
uapsd_disable:disable U-APSD functionality (default: Y) (bool)
bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default:
0) (int)
power_save:enable WiFi power management (default: disable) (bool)
power_level:default power save level (range from 1 - 5, default: 1) (int)
fw_monitor:firmware monitor - to debug FW (default: false - needs lots of
memory) (bool)
$ iwconfig wlp3s0
wlp3s0 IEEE 802.11abg ESSID:"freebox_CJBHVW"
Mode:Managed Frequency:2.417 GHz Access Point: F4:CA:E5:88:30:DC
Bit Rate=48 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=48/70 Signal level=-62 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:71 Missed beacon:0
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1590985
Title:
Wifi non-functional after suspend (Intel 6205)
Status in linux package in Ubuntu:
Incomplete
Bug description:
Often, but not always, on resume from suspend my wifi does not
connect. In the networking tray drop-down I can see one single wifi
network listed (out of the many within range), and it can't reconnect
to my network.
I clear it with the hammer of:
sudo rmmod iwldvm && sudo modprobe iwldvm
I'm not sure what would be more appropriate, but that works. Then my
laptop auto-connects to the right network, as expected.
Turning on/off the hardware wireless switch on the thinkpad does not
clear the problem.
Just before running ubuntu-bug to submit this, I had the problem, then
reloaded the iwldvm module.
----
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-22-generic 4.4.0-22.40
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: james 1934 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu Jun 9 18:57:10 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-05-21 (19 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.1)
MachineType: LENOVO 2325KZ5
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic
root=UUID=72122534-7dd5-411b-9c56-c4844502e0ad ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-22-generic N/A
linux-backports-modules-4.4.0-22-generic N/A
linux-firmware 1.157
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/05/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G2ETA0WW (2.60 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2325KZ5
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: 518896
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrG2ETA0WW(2.60):bd03/05/2013:svnLENOVO:pn2325KZ5:pvrThinkPadX230:rvnLENOVO:rn2325KZ5:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2325KZ5
dmi.product.version: ThinkPad X230
dmi.sys.vendor: LENOVO
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