Re: WiFi interface disappeared

[Dan Williams <dcbw redhat com>]

On Mon, 2015-09-14 at 17:32 -0400, Jim wrote:
> Dan
>
> Thanks for replying.  As I mentioned the WiFi on the same box runs fine 
> from Ubuntu or from Windows.
>
> Here are the lspci and lsusb
>
> Jim$lspci
...
> 08:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 
> 802.11b/g/n WiFi Adapter (rev 01)

So you have a Realtek 8188CE device.

> In addition, here is lsmod
> Jim$lsmod
> Module                  Size  Used by
> i915                  958755  3
> i2c_algo_bit           13250  1 i915
> drm_kms_helper         93604  1 i915
> crct10dif_pclmul       14307  0
> crc32_pclmul           13133  0
> crc32c_intel           22094  0
> drm                   300858  5 i915,drm_kms_helper
> ghash_clmulni_intel    13230  0
> r8169                  71639  0
> mii                    13527  1 r8169
> video                  19825  1 i915
> sunrpc                279333  1

This shows there is no kernel driver loaded for your device.  Yes, r8169
is a realtek driver, but it's for ethernet devices not wifi.  I'd expect
to see an rtl81xx (maybe rtl8192) or similar module.  Next step is:

dmesg | grep rtl

and lets see what we get.

Dan



> On 09/14/2015 03:17 PM, Dan Williams wrote:
> > On Mon, 2015-09-14 at 14:10 -0400, JimR wrote:
> > > Fedora Core 21, KDE spin, all patches up to date.
> > >
> > > Have run for many months using WiFi almost exclusively. Started using OpenVPN a couple of months ago 
> > > with a commercial VPN provider. (Not sure if that matters). That has worked fine.
> > >
> > > Got notification from Apper that some packages needed updating, including kernel. Performed the update 
> > > from the Apper UI.  I don't know if Networkmanager was in the list.
> > >
> > > After reboot, WiFi no longer works, in fact, the whole WiFi interface has disappeared from ifconfig and 
> > > from the NetworkServices UI. I plugged in an ethernet cable, and it works fine. Machine is triple-boot, 
> > > FC21, Win7 and Ubuntu LTS 14.04. WiFi works fine in Win and Ubu.
> > >
> > > I tried re-adding the interface, wlp8s0 using the Connection Editor. Seemed happy, but it still won't 
> > > start nor  list in ifconfig
> > If the device isn't listed in ifconfig the the kernel cannot see it, and
> > thus NetworkManager can't see it.  It seems like there is either a
> > hardware problem with your wifi device, or the kernel has been updated
> > and no longer recognizes the wifi device.  What is the output of 'lsusb'
> > and 'lspci' when those commands are run in a terminal on your machine?
> >
> > Dan
> >
> > > I found this in the messages log around the time of the failure, but googling this does not produce any 
> > > meaningful help:
> > >
> > > Sep 12 23:16:04 KD1YV1 NetworkManager[733]: <info> (wlp8s0): device state change: activated -> 
> > > deactivating (reason 'removed') [100 110 36]
> > > Sep 12 23:16:04 KD1YV1 NetworkManager[733]: <info> NetworkManager state is now CONNECTED_LOCAL
> > > Sep 12 23:16:04 KD1YV1 NetworkManager[733]: <info> (wlp8s0): device state change: deactivating -> 
> > > unmanaged (reason 'removed') [110 10 36]
> > > Sep 12 23:16:04 KD1YV1 NetworkManager[733]: <info> (wlp8s0): deactivating device (reason 'removed') [36]
> > >
> > > Help!
> > > JimR
> > > _______________________________________________ networkmanager-list mailing list networkmanager-list 
> > > gnome org https://mail.gnome.org/mailman/listinfo/networkmanager-list