CentOS - Apr 2016 - CentOS 7.2 laptop wireless Intel Corporation Centrino Wireless-N 2230 (rev c4)

Output of dmesg / messages is found in a previous email (buried in the
message thread)

https://lists.centos.org/pipermail/centos/2016-April/158703.html

Any advice?



On Wed, Apr 13, 2016 at 10:42 PM, Philip V <pv.bugzilla+centos at
gmail.com> wrote:
> With CentOS 7.2 a laptop wireless card is recognized in dmesg, but
> nonfunctional. Toggling the hardware wifi switch causes the Bluetooth
> icon to appear and disappear. The network configuration window shows
> the Wireless tab greyed out.  Rebooting with the bluetooth enabled
> does not help. It appears the appropriate driver is iwlwifi, which is
> what works in Fedora and appears to be available and installed in
> CentOS.
>
> 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.

On Thu, Apr 14, 2016 at 2:26 PM, Philip V <pv.bugzilla+centos at
gmail.com> wrote:
> Any advice?
Output of rfkill list?

Brandon Vincent

Please note, I reinstalled, because a virus named windows 8
spontaneously "repaired" the drive eliminating the dual-boot.
This time I configured wireless in the initial stage of installation
from DVD, it did connect. But after install, after reboot, it appears
not to be available.
Have not yet installed any extra packages.

$ rfkill list
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
2: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

$ dmesg|grep iwlwifi
[    3.766133] iwlwifi 0000:08:00.0: can't disable ASPM; OS doesn't
have ASPM control
[    3.766267] iwlwifi 0000:08:00.0: irq 31 for MSI/MSI-X
[    3.783806] iwlwifi 0000:08:00.0: loaded firmware version
18.168.6.1 op_mode iwldvm
[    3.836905] iwlwifi 0000:08:00.0: CONFIG_IWLWIFI_DEBUG disabled
[    3.836909] iwlwifi 0000:08:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[    3.836911] iwlwifi 0000:08:00.0: CONFIG_IWLWIFI_DEVICE_TRACING disabled
[    3.836914] iwlwifi 0000:08:00.0: Detected Intel(R) Centrino(R)
Wireless-N 2230 BGN, REV=0xC8
[    3.837018] iwlwifi 0000:08:00.0: L1 Enabled - LTR Disabled
[  501.206643] iwlwifi 0000:08:00.0: RF_KILL bit toggled to disable radio.
[  503.716639] iwlwifi 0000:08:00.0: RF_KILL bit toggled to enable radio.

(yes, I toggled the hardware switch, which seemed to only affect the
Bluetooth again.)
ifconfig does not report any wireless adapter.


On Thu, Apr 14, 2016 at 11:12 PM, Brandon Vincent
<Brandon.Vincent at asu.edu> wrote:
> On Thu, Apr 14, 2016 at 2:26 PM, Philip V <pv.bugzilla+centos at
gmail.com> wrote:
>> Any advice?
>
> Output of rfkill list?
>
> Brandon Vincent