Re: WiFi interface disappeared

[Larry Finger <Larry Finger lwfinger net>]

On 09/14/2015 06:12 PM, Jim wrote:
> Dan
>
> On FC21, the dmesg | grep rtl returns nothing.
>
> In contrast, I booted Ubuntu and ran the same commands, which clearly show an
> 8192 (see below).  Now how do I restore that device?
>
> Thanks,
> Jim
>
> (From Ubuntu)
> 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM
> Controller (rev 09)
> 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
> Processor Family Integrated Graphics Controller (rev 09)
> 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset
> Family MEI Controller #1 (rev 04)
> 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family
> USB Enhanced Host Controller #2 (rev 04)
> 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High
> Definition Audio Controller (rev 04)
> 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI
> Express Root Port 1 (rev b4)
> 00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI
> Express Root Port 2 (rev b4)
> 00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI
> Express Root Port 3 (rev b4)
> 00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI
> Express Root Port 4 (rev b4)
> 00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI
> Express Root Port 8 (rev b4)
> 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family
> USB Enhanced Host Controller #1 (rev 04)
> 00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller
> (rev 04)
> 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6
> port SATA AHCI Controller (rev 04)
> 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus
> Controller (rev 04)
> 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411
> PCI Express Gigabit Ethernet Controller (rev 06)
> 03:00.0 System peripheral: Ricoh Co Ltd MMC/SD Host Controller (rev 07)
> 08:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE
> 802.11b/g/n WiFi Adapter (rev 01)
> Bus 002 Device 003: ID 0a5c:217f Broadcom Corp. BCM2045B (BDC-2.1)
> Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 001 Device 003: ID 5986:03b3 Acer, Inc
> Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Module                  Size  Used by
> ctr                    13049  2
> ccm                    17773  2
> rfcomm                 69160  8
> bnep                   19624  2
> snd_hda_codec_hdmi     46368  1
> snd_hda_codec_conexant    57486 1
> uvcvideo               80885 0
> videobuf2_vmalloc      13216  1 uvcvideo
> videobuf2_memops       13362  1 videobuf2_vmalloc
> videobuf2_core         40664  1 uvcvideo
> videodev              134688  2 uvcvideo,videobuf2_core
> snd_hda_intel          56531  3
> snd_hda_codec         193017  3
> snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
> snd_hwdep              13602  1 snd_hda_codec
> arc4                   12608  2
> intel_rapl             18773  0
> x86_pkg_temp_thermal    14205  0
> intel_powerclamp       14705  0
> coretemp               13435  0
> snd_pcm               102099  3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
> kvm_intel             143187  0
> kvm                   455843  1 kvm_intel
> snd_page_alloc         18710  2 snd_pcm,snd_hda_intel
> crct10dif_pclmul       14289  0
> snd_seq_midi           13324  0
> crc32_pclmul           13113  0
> snd_seq_midi_event     14899  1 snd_seq_midi
> ghash_clmulni_intel    13216  0
> cryptd                 20359  1 ghash_clmulni_intel
> joydev                 17381  0
> snd_rawmidi            30144  1 snd_seq_midi
> btusb                  32412  0
> serio_raw              13462  0
> bluetooth             391136  22 bnep,btusb,rfcomm
> snd_seq                61560  2 snd_seq_midi_event,snd_seq_midi
> thinkpad_acpi          81013  1
> nvram                  14411  1 thinkpad_acpi
> rtl8192ce              53550  0
> rtl_pci                26690  1 rtl8192ce
> rtlwifi                63475  2 rtl_pci,rtl8192ce
> rtl8192c_common        53172  1 rtl8192ce
> snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi
> mac80211              630728  3 rtl_pci,rtlwifi,rtl8192ce
> snd_timer              29482  2 snd_pcm,snd_seq
> snd                    69322  18
> snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,thinkpad_acpi,snd_seq_device,snd_seq_midi
>
> cfg80211              484040  2 mac80211,rtlwifi
> i915                  788212  3
> mac_hid                13205  0
> video                  19476  1 i915
> drm_kms_helper         55071  1 i915
> drm                   303102  4 i915,drm_kms_helper
> mei_me                 18627  0
> lpc_ich                21080  0
> mei                    82276  1 mei_me
> i2c_algo_bit           13413  1 i915
> shpchp                 37032  0
> soundcore              12680  1 snd
> parport_pc             32701  0
> ppdev                  17671  0
> lp                     17759  0
> parport                42348  3 lp,ppdev,parport_pc
> psmouse               106692  0
> ahci                   34091  1
> sdhci_pci              23172  0
> libahci                32716  1 ahci
> r8169                  71677  0
> sdhci                  43015  1 sdhci_pci
> mii                    13934  1 r8169
> [   18.494738] rtl8192ce: Using firmware rtlwifi/rtl8192cfw.bin
> [   18.621555] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
> [   18.621815] rtlwifi: wireless switch is on
> Jim$
> Jim$
> Jim$grep 8192 tmp/2dan
> rtl8192ce              53550  0
> rtl_pci                26690  1 rtl8192ce
> rtlwifi                63475  2 rtl_pci,rtl8192ce
> rtl8192c_common        53172  1 rtl8192ce
> mac80211              630728  3 rtl_pci,rtlwifi,rtl8192ce
> [   18.494738] rtl8192ce: Using firmware rtlwifi/rtl8192cfw.bin

In the /boot directory, there should be a file named config-xxx, where xxx 
corresponds to the output of the 'uname -r' command. My only conclusion is that 
there is a configuration error in that Fedora kernel and CONFIG_RTL8192CE was 
not set. Driver rtl8192ce, which is the one used by your card, has been 
available in every kernel since 2.6.38.

Larry