[CentOS] CentOS 7.2 laptop wireless Intel Corporation Centrino Wireless-N 2230 (rev c4)

[Andreas Benzler]

Good morning Philip,

- To install a most vanilla kernel elrepo is a quick step look forward about kernel solution
- Yes build own kernel by a special kernel specification for your machine. Why not?
- Frozen a kernel in fact „it works“ with the right firmware for your wifi is a good solution.

I got a mixed network with Windows 3.11 up to Windows 10 and Linux with OpenSuse, Ubuntu
and a HPC Centos 7 Cluster on Opteron 6380.

By the way, when you get a preinstalled System on a laptop it works in most cases from prebuilder.

It’s a common thing to use the given driver. To upgrade it all the time by update can hold you back
todo you real work.

As hardware, network and software specialist i try out different compositions. My private iMac 2010 not
run really on the 2.6 - Centos 6 or 3.10 kernel form Centos 7. Same effect on newer hardware from „today“.

To build the right kernel for specific hardware is for me a common thing. Freeze it when i got - also.

We froze the HPC cluster at 7.1.503, because it works for us. To update or upgrade can not be done all the time,
 our calculations run from hours to month….

Some of you say Centos 7.0 works why not download this kernel from vault.centos.org <http://vault.centos.org/> and install with yum install kernel…rpm?

Sincerely

Andy
> Am 14.04.2016 um 23:16 schrieb Philip V <pv.bugzilla+centos at gmail.com>:
> 
> Hi John, Thank you, elrepo sounds good to know about --
> http://elrepo.org/tiki/About <http://elrepo.org/tiki/About> says is an extra repository for hardware
> support.
> Still not clear how to troubleshoot the problem so I know what to
> install from elrepo.
> 
> I know that a spec file is involved in creating an RPM file; do you
> mean that you make your own kernel RPM?
> 
> 
> On Thu, Apr 14, 2016 at 4:05 AM, Andreas Benzler <andreas at benzlerweb.de <mailto:andreas at benzlerweb.de>> wrote:
>> Hello Philip,
>> 
>> In my test cases on Centos 6 or 7 I always run an elrepo kernel or build my own one from rewritten spec file. That helps me out to get Centos work as good it can be.
>> 
>> Personal playground, those packages are unsigned!!!
>> 
>> http://centos.cms4all.org/centos/7/ <http://centos.cms4all.org/centos/7/> <http://centos.cms4all.org/centos/7/ <http://centos.cms4all.org/centos/7/>>
>> 
>> <kernel>
>> noarch git firmware
>> kernel ml aufs - oh I was lazy
>> 
>> <gstreamer>
>> - Get Multimedia work, all my videos incl. DVD, midi and other audio files are working
>>  I was given up after test many repros.
>> 
>> <drivers>
>> libdrm
>> radeon (no new iMac 2015…hmmm)
>> hardinfo
>> 
>> <other>
>> mutter - gnome 3 windows shadow hack
>> netatalk - apple time capsule on centos
>> 
>> 
>> Centos 7 live on usbdrive to test it on different machines….
>> 
>> Fun with Centos 7
>> 
>> PS:hm… gstreamer was working with centos 6 damm
>> 
>>     Don’t hammer my virtual server otherwise i push them away….
>> 
>> 
>> 
>> 
>> 
>>> Am 14.04.2016 um 08:47 schrieb Andreas Benzler <andreas at benzlerweb.de>:
>>> 
>>> this seems to be the right firmware
>>> 
>>> https://wireless.wiki.kernel.org/_media/en/users/drivers/iwlwifi-2030-ucode-18.168.6.1.tgz <https://wireless.wiki.kernel.org/_media/en/users/drivers/iwlwifi-2030-ucode-18.168.6.1.tgz>
>>> 
>>> 
>>> 
>>>> Am 14.04.2016 um 05:01 schrieb John R Pierce <pierce at hogranch.com>:
>>>> 
>>>> On 4/13/2016 7:42 PM, Philip V wrote:
>>>>> lspci gives
>>>>> 08:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev c4)
>>>>> 
>>>>> 1. How do I get this working?  I am happy to work with command line tools.
>>>>> 
>>>>> 2. Are there other packages I need? I installed wireless-tools, and
>>>>> tried to fiddle with iwconfig and NetworkManager to no avail. iwconfig
>>>>> does seem to interact with the wifi device.
>>>>> 
>>>>> 3. Is there documentation I should be following to
>>>>> understand/troubleshoot networking support?
>>>>> https://wiki.centos.org/HowTos/Laptops/Wireless  does not document the
>>>>> iwlwifi driver.
>>>> 
>>>> 
>>>> https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi
>>>> 
>>>> suggests you might need to get a firmware tarball for that card, and copy the appropriate iwlwifi-*.ucode file to /lib/firmware or something.
>>>> 
>>>> 
>>>> 
>>>> --
>>>> john r pierce, recycling bits in santa cruz
>>>> 
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