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**GreyGeek** · Jul 06, 2014, 02:29 PM

Open a Konsole and try

sudo -i
echo "options iwlwifi 11n_disable=1" >> /etc/modprobe.d/iwlwifi.conf
exit

Reboot and see if eliminating the N band capability improve your connection (leaving b or g as the possible modes. g will give you a maximum of 54Mb speed)

**Don** · Jul 06, 2014, 03:15 PM

Hi, GG,
I'm happy to try that, but how do I undo those commands if they do not work?

**Snowhog** · Jul 06, 2014, 03:19 PM

Simple. Just edit the file as root. Press Alt+F2 and type:
kdesudo kate /etc/modprobe.d/iwlwifi.conf
Go to the end of the file and delete the last line. Save and close.

**Don** · Jul 06, 2014, 03:23 PM

Thanks, Snowhog. I'll give it a shot.

**Don** · Jul 06, 2014, 03:29 PM

Originally posted by GreyGeek View Post

Open a Konsole and try

sudo -i
echo "options iwlwifi 11n_disable=1" >> /etc/modprobe.d/iwlwifi.conf
exit

Reboot and see if eliminating the N band capability improve your connection (leaving b or g as the possible modes. g will give you a maximum of 54Mb speed)

I did, but it didn't. Is there a log file or other print-out that would help at this point?

**Snowhog** · Jul 06, 2014, 03:43 PM

Check to see if the system offers a proprietary driver that can be activated.

K Menu > System Settings > Driver Manager

IF a driver is listed, ensure that it is checked. If it is not, check it and click Apply.

**Don** · Jul 06, 2014, 04:10 PM

Driver Manager shows nothing at all. I refreshed it; still nothing.

**Snowhog** · Jul 06, 2014, 04:24 PM

You need a specific kernel module in order to get your wireless adapter to work.

See http://manpages.ubuntu.com/manpages/....4freebsd.html

Greygeek might be able to assist further with this information.

**Don** · Jul 06, 2014, 04:26 PM

The module I'm running is 3.13.0-30-generic. I'll check it out with Grey Geek. Thanks.

**Don** · Jul 07, 2014, 06:57 AM

From the file that Snowhog suggested, it appears that I need to modify the kernel configuration file. I'm too old still to be a newbie, but I think I qualify as an oldbie. In 14.04, which is the kernel configuration file, and do I edit it the same way as any other file. My guess is no. Once I find the file and make changes to it, I suspect I have to recompile the kernel. There's lots of stuff out there on how to do that; is there one particular how-to source that folks have found effective?

**GreyGeek** · Jul 07, 2014, 10:17 AM

Recompiling the kernel driver isn't an option I would recommend at this point. Twenty years ago, when I first began using Linux, compiling the kernel was a necessity unless one happened to use the specific devices that the developer used and compiled into the kernel. Back then, a distro was controlled by settings in the inittab file (Initialization Table) and by running XF86config for the video and compiling ethernet drivers separately. When the kernel became modular various devices could be turned on or off in the kernel config file and the kernel recompiled for a specific driver. Today, the kernel is modular, and ~~all~~ most available device modules are compiled as *.ko (kernel object) files which modprobe, rmmod and other programs install into memory to run, or remove them. Those that are not have been considered as too old to include because of space limitations on the ISO that will be burned to a CD.

The Intel support page for this device points to the following firmware ucode tar file:
http://wireless.kernel.org/en/users/...-41.28.5.1.tgz
The 6050 firmware, which is what Intel recommends for the WIMAX 6250, is also located at
http://wireless.kernel.org/en/users/Drivers/iwlwifi

On my Kubuntu 14.04 installation the 6050 firmware is NOT found in /lib/firmware, and probably isn't on your system either.

After you untar it the readme in that tar file says

Code:

Installation of the firmware is simply:

        % cp iwlwifi-6050-5.ucode /lib/firmware

and then "sudo modprob iwlwifi".

Your wifi should work. If it does, and to be sure, reboot and see if it automatically loads and starts your wifi.

The assumption here is that with the WIMAX 6250 specific firmware installed, the kernel supplied iwlwifi module should drive your device correctly. If it doesn't then that is why SnowHog suggested the possibility of recompiling the kernel, to create a module which the compile links specifically to your device. If you do decide to recompile your kernel then you should install all the kernel header files, the build tools, the compiler and the kernel source and config files, and be prepared to recompile everytime the kernel is updated.

However, changing module parameters may help, and is easier to do. Here is what the modinfo command shows:

Code:

$ modinfo iwlwifi
filename:       /lib/modules/3.13.0-30-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
license:        GPL
author:         Copyright(c) 2003-2013 Intel Corporation <ilw@linux.intel.com>
version:        in-tree:
description:    Intel(R) Wireless WiFi driver for Linux
firmware:       iwlwifi-100-5.ucode    ([COLOR=#ff0000]if your firmware code isn't in this list the module may not work[/COLOR])
firmware:       iwlwifi-1000-5.ucode
firmware:       iwlwifi-135-6.ucode
firmware:       iwlwifi-105-6.ucode
firmware:       iwlwifi-2030-6.ucode
firmware:       iwlwifi-2000-6.ucode
firmware:       iwlwifi-5150-2.ucode
firmware:       iwlwifi-5000-5.ucode
firmware:       iwlwifi-6000g2b-6.ucode
firmware:       iwlwifi-6000g2a-5.ucode
firmware:       iwlwifi-6050-5.ucode
firmware:       iwlwifi-6000-4.ucode
firmware:       iwlwifi-3160-7.ucode
firmware:       iwlwifi-7260-7.ucode
srcversion:     1E6912E109D5A43B310FB34
alias:          pci:v00008086d0000095Asv*sd00005490bc*sc*i*
alias:          pci:v00008086d0000095Bsv*sd00005290bc*sc*i*
... ([COLOR=#ff0000]this is a long list of device pci codes: vendor:device.  If your device's code isn't list here it may not work[/COLOR])
... ([COLOR=#ff0000]use the lspci command to get the list.  My wifi device gave the following:[/COLOR])
... ([COLOR=#0000cd]0d:00.0[/COLOR] [COLOR=#ff0000]Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01)[/COLOR] )
... ([COLOR=#ff0000]the blue numbers gives the vendor:device[/COLOR])
alias:          pci:v00008086d00004232sv*sd00001204bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001301bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001201bc*sc*i*
depends:        cfg80211  ([COLOR=#ff0000]modinfo cfg80211 gives two adjustable parameters[/COLOR])
intree:         Y
vermagic:       3.13.0-30-generic SMP mod_unload modversions 
signer:         Magrathea: Glacier signing key
sig_key:        09:4B:30:96:4E:E6:CE:B2:C5:67:D2:52:22:6B:47:71:2C:FD:8A:F6
sig_hashalgo:   sha512
([COLOR=#ff0000]parm: gives the listing of adjustable parameters for this device. some need an integer --0,1,2,etc and some are boolean -- true, false[/COLOR])
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 (defualt: 0 dB) (int)
parm:           wd_disable:Disable stuck queue watchdog timer 0=system default, 1=disable, 2=enable (default: 0) (int)
parm:           nvm_file:NVM file name (charp)
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)

You can experiment with settings of the module. All of them are set using settings in
/etc/modprobe.d/iwlwifi.conf
which is edited as root. Keep it simple, one command on each line, with the file ending with a blank line. Rather than rebooting, you can use

sudo rmmod iwlwifi
sudo modprobe iwlwifi

to force a re-read of the iwlwifi.conf file.

You could also use

...
sudo modprobe iwlwifi option=value option=value ...

to set them using modprobe. Using this method you can quickly find which settings work, if any, and then edit iwlwifi.conf and make permenant settings.

**Don** · Jul 10, 2014, 09:38 AM

I'm beginning to think I'm looking at the wrong problem entirely. I have noticed in the last couple of days that the machine connects to the web inconsistently even on a wired connection. I have tried the connections with different cables, in multiple locations, and always with the same result. Sometimes it connects; sometimes it doesn't. I think at this point I should begin to suspect the mobo. Am I further off base than is normal for me?

**GreyGeek** · Jul 10, 2014, 09:44 AM

Originally posted by Don View Post

I'm beginning to think I'm looking at the wrong problem entirely. I have noticed in the last couple of days that the machine connects to the web inconsistently even on a wired connection. I have tried the connections with different cables, in multiple locations, and always with the same result. Sometimes it connects; sometimes it doesn't. I think at this point I should begin to suspect the mobo. Am I further off base than is normal for me?

The mobo is common to both the cable and wireless connections, but so is the router connected to your cable modem, and the cable modem itself. Does cold booting both the cable modem and the router change behaviors?

**Don** · Jul 10, 2014, 09:48 AM

GG, I'll try that, but my trouble-shooting has been with different routers and different modems. I'm at work now, so I cannot reboot anything other than the computer. I'll give that a shot now, and when I get home I can try the other steps. It may be noteworthy, though, that my other machines connected both at home and at work are not experiencing this problem. Thanks for the suggestion; I'll check back tomorrow or Saturday.

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