no wifi adapter found ubuntu 18.04.1 LTS

alveeru · 08-14-2018, 07:05 AM

Dear All,

Today I installed Ubuntu version 18.04.1 LTS on my Dell 3460 laptop and the system is working normally except Wifi.
No available network appears, clicking on the Wifi feature will display the message "No Wi-Fi adapter found". I've already looked for help on the internet plus none of the solutions presented served.

Please, could you help me?

viren@viren-Latitude-3460:~$ rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
1: dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: yes
2: dell-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
3: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

viren@viren-Latitude-3460:~$ lsmod
Module Size Used by
rndis_host 16384 0
cdc_ether 16384 1 rndis_host
usbnet 45056 2 rndis_host,cdc_ether
nls_utf8 16384 0
isofs 45056 0
uas 24576 0
usb_storage 69632 1 uas
rfcomm 77824 4
cmac 16384 1
bnep 20480 2
rtsx_usb_ms 20480 0
memstick 16384 1 rtsx_usb_ms
uvcvideo 86016 0
videobuf2_vmalloc 16384 1 uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
videobuf2_v4l2 24576 1 uvcvideo
videobuf2_core 40960 2 uvcvideo,videobuf2_v4l2
videodev 184320 3 uvcvideo,videobuf2_core,videobuf2_v4l2
media 40960 2 uvcvideo,videodev
wl 6447104 0
joydev 24576 0
dell_smbios_smm 16384 0
dcdbas 16384 1 dell_smbios_smm
dell_smm_hwmon 16384 0
intel_rapl 20480 0
x86_pkg_temp_thermal 16384 0
intel_powerclamp 16384 0
coretemp 16384 0
kvm_intel 204800 0
kvm 593920 1 kvm_intel
irqbypass 16384 1 kvm
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
pcbc 16384 0
dell_laptop 20480 1
aesni_intel 188416 2
aes_x86_64 20480 1 aesni_intel
crypto_simd 16384 1 aesni_intel
glue_helper 16384 1 aesni_intel
cryptd 24576 3 crypto_simd,ghash_clmulni_intel,aesni_intel
snd_hda_codec_hdmi 49152 1
intel_cstate 20480 0
intel_rapl_perf 16384 0
snd_hda_codec_realtek 94208 1
snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
dell_smbios_wmi 16384 0
dell_wmi 16384 0
snd_hda_intel 40960 4
dell_smbios 16384 4 dell_wmi,dell_laptop,dell_smbios_wmi,dell_smbios_smm
input_leds 16384 0
snd_hda_codec 126976 4 snd_hda_intel,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek
serio_raw 16384 0
snd_hda_core 81920 5 snd_hda_intel,snd_hda_codec,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek
snd_hwdep 20480 1 snd_hda_codec
dell_wmi_descriptor 16384 2 dell_wmi,dell_smbios_wmi
snd_pcm 98304 4 snd_hda_intel,snd_hda_codec,snd_hda_core,snd_hda_codec_hdmi
sparse_keymap 16384 1 dell_wmi
wmi_bmof 16384 0
arc4 16384 2
ath9k 151552 0
snd_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
ath9k_common 36864 1 ath9k
ath9k_hw 471040 2 ath9k,ath9k_common
snd_rawmidi 32768 1 snd_seq_midi
ath 28672 3 ath9k_hw,ath9k,ath9k_common
hid_multitouch 20480 0
mac80211 778240 1 ath9k
snd_seq 65536 2 snd_seq_midi_event,snd_seq_midi
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 32768 2 snd_seq,snd_pcm
ath3k 20480 0
btusb 45056 0
btrtl 16384 1 btusb
btbcm 16384 1 btusb
btintel 16384 1 btusb
cfg80211 622592 5 wl,mac80211,ath9k,ath,ath9k_common
bluetooth 548864 34 btrtl,btintel,bnep,btbcm,rfcomm,ath3k,btusb
lpc_ich 24576 0
snd 81920 19 snd_hda_intel,snd_hwdep,snd_seq,snd_hda_codec,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec _generic,snd_seq_device,snd_hda_codec_realtek,snd_pcm
ecdh_generic 24576 2 bluetooth
mei_me 40960 0
shpchp 36864 0
mei 90112 1 mei_me
soundcore 16384 1 snd
dell_smo8800 16384 0
mac_hid 16384 0
dell_rbtn 16384 0
acpi_pad 180224 0
sch_fq_codel 20480 3
parport_pc 36864 0
ppdev 20480 0
lp 20480 0
parport 49152 3 lp,parport_pc,ppdev
ip_tables 28672 0
x_tables 40960 1 ip_tables
autofs4 40960 2
hid_generic 16384 0
rtsx_usb_sdmmc 28672 0
usbhid 49152 0
rtsx_usb 20480 2 rtsx_usb_sdmmc,rtsx_usb_ms
i915 1617920 17
i2c_algo_bit 16384 1 i915
drm_kms_helper 172032 1 i915
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
psmouse 147456 0
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
ahci 36864 1
r8169 86016 0
drm 401408 6 i915,drm_kms_helper
libahci 32768 1 ahci
mii 16384 2 r8169,usbnet
wmi 24576 4 dell_wmi,wmi_bmof,dell_wmi_descriptor,dell_smbios_wmi
video 45056 3 dell_wmi,dell_laptop,i915
i2c_hid 20480 0
hid 118784 4 i2c_hid,hid_generic,usbhid,hid_multitouch

TB0ne · 08-14-2018, 09:29 AM

Quote:

Originally Posted by alveeru

Dear All,
Today I installed Ubuntu version 18.04.1 LTS on my Dell 3460 laptop and the system is working normally except Wifi. No available network appears, clicking on the Wifi feature will display the message "No Wi-Fi adapter found". I've already looked for help on the internet plus none of the solutions presented served. Please, could you help me?

Code:

viren@viren-Latitude-3460:~$ rfkill list
0: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: yes
1: dell-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: yes
2: dell-bluetooth: Bluetooth
	Soft blocked: no
	Hard blocked: no
3: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no

Code:

viren@viren-Latitude-3460:~$ lsmod
Module                  Size  Used by
rndis_host             16384  0
cdc_ether              16384  1 rndis_host
usbnet                 45056  2 rndis_host,cdc_ether
nls_utf8               16384  0
isofs                  45056  0
uas                    24576  0
usb_storage            69632  1 uas
rfcomm                 77824  4
cmac                   16384  1
bnep                   20480  2
rtsx_usb_ms            20480  0
memstick               16384  1 rtsx_usb_ms
uvcvideo               86016  0
videobuf2_vmalloc      16384  1 uvcvideo
videobuf2_memops       16384  1 videobuf2_vmalloc
videobuf2_v4l2         24576  1 uvcvideo
videobuf2_core         40960  2 uvcvideo,videobuf2_v4l2
videodev              184320  3 uvcvideo,videobuf2_core,videobuf2_v4l2
media                  40960  2 uvcvideo,videodev
wl                   6447104  0
joydev                 24576  0
dell_smbios_smm        16384  0
dcdbas                 16384  1 dell_smbios_smm
dell_smm_hwmon         16384  0
intel_rapl             20480  0
x86_pkg_temp_thermal    16384  0
intel_powerclamp       16384  0
coretemp               16384  0
kvm_intel             204800  0
kvm                   593920  1 kvm_intel
irqbypass              16384  1 kvm
crct10dif_pclmul       16384  0
crc32_pclmul           16384  0
ghash_clmulni_intel    16384  0
pcbc                   16384  0
dell_laptop            20480  1
aesni_intel           188416  2
aes_x86_64             20480  1 aesni_intel
crypto_simd            16384  1 aesni_intel
glue_helper            16384  1 aesni_intel
cryptd                 24576  3 crypto_simd,ghash_clmulni_intel,aesni_intel
snd_hda_codec_hdmi     49152  1
intel_cstate           20480  0
intel_rapl_perf        16384  0
snd_hda_codec_realtek    94208  1
snd_hda_codec_generic    73728  1 snd_hda_codec_realtek
dell_smbios_wmi        16384  0
dell_wmi               16384  0
snd_hda_intel          40960  4
dell_smbios            16384  4 dell_wmi,dell_laptop,dell_smbios_wmi,dell_smbios_smm
input_leds             16384  0
snd_hda_codec         126976  4 snd_hda_intel,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek
serio_raw              16384  0
snd_hda_core           81920  5 snd_hda_intel,snd_hda_codec,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek
snd_hwdep              20480  1 snd_hda_codec
dell_wmi_descriptor    16384  2 dell_wmi,dell_smbios_wmi
snd_pcm                98304  4 snd_hda_intel,snd_hda_codec,snd_hda_core,snd_hda_codec_hdmi
sparse_keymap          16384  1 dell_wmi
wmi_bmof               16384  0
arc4                   16384  2
ath9k                 151552  0
snd_seq_midi           16384  0
snd_seq_midi_event     16384  1 snd_seq_midi
ath9k_common           36864  1 ath9k
ath9k_hw              471040  2 ath9k,ath9k_common
snd_rawmidi            32768  1 snd_seq_midi
ath                    28672  3 ath9k_hw,ath9k,ath9k_common
hid_multitouch         20480  0
mac80211              778240  1 ath9k
snd_seq                65536  2 snd_seq_midi_event,snd_seq_midi
snd_seq_device         16384  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer              32768  2 snd_seq,snd_pcm
ath3k                  20480  0
btusb                  45056  0
btrtl                  16384  1 btusb
btbcm                  16384  1 btusb
btintel                16384  1 btusb
cfg80211              622592  5 wl,mac80211,ath9k,ath,ath9k_common
bluetooth             548864  34 btrtl,btintel,bnep,btbcm,rfcomm,ath3k,btusb
lpc_ich                24576  0
snd                    81920  19 snd_hda_intel,snd_hwdep,snd_seq,snd_hda_codec,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_seq_device,snd_hda_codec_realtek,snd_pcm
ecdh_generic           24576  2 bluetooth
mei_me                 40960  0
shpchp                 36864  0
mei                    90112  1 mei_me
soundcore              16384  1 snd
dell_smo8800           16384  0
mac_hid                16384  0
dell_rbtn              16384  0
acpi_pad              180224  0
sch_fq_codel           20480  3
parport_pc             36864  0
ppdev                  20480  0
lp                     20480  0
parport                49152  3 lp,parport_pc,ppdev
ip_tables              28672  0
x_tables               40960  1 ip_tables
autofs4                40960  2
hid_generic            16384  0
rtsx_usb_sdmmc         28672  0
usbhid                 49152  0
rtsx_usb               20480  2 rtsx_usb_sdmmc,rtsx_usb_ms
i915                 1617920  17
i2c_algo_bit           16384  1 i915
drm_kms_helper        172032  1 i915
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
psmouse               147456  0
sysimgblt              16384  1 drm_kms_helper
fb_sys_fops            16384  1 drm_kms_helper
ahci                   36864  1
r8169                  86016  0
drm                   401408  6 i915,drm_kms_helper
libahci                32768  1 ahci
mii                    16384  2 r8169,usbnet
wmi                    24576  4 dell_wmi,wmi_bmof,dell_wmi_descriptor,dell_smbios_wmi
video                  45056  3 dell_wmi,dell_laptop,i915
i2c_hid                20480  0
hid                   118784  4 i2c_hid,hid_generic,usbhid,hid_multitouch

I have bolded and underlined a line in what you posted for emphasis only. It's saying that the interface is 'hard blocked'...meaning it's disabled. This is due to one of two things:

There is a switch to enable/disable wifi (try FN-F2 **OR** FN-ALT-F2, or look for a small switch). While the FN-F2 is supposed to work to turn on wifi...sometimes that's only for Windows. The FN-ALT-F2 works in Linux. Again, sometimes.
You had Windows on this system, and as a result, the Windows driver has disabled the devices firmware. The solution here may be to boot into Windows, and re-enable it. Should work after that.

You could also try running "sudo rfkill unblock all", then see if the device is unblocked first.

alveeru · 08-14-2018, 02:40 PM

Thank you TB0ne for you time, however i have tried all 3 ways ...but none of worked...in my laptop there is no option of switch for on or off wifi.
2nd Fn+F2 doesn't work as well.
i have tried "sudo rfkill unblock all" as well. still no luck.

it is working perfectly fine in windows 10 but not in ubuntu. i didn't get it how i can enable it through windows 10 for ubuntu.

please help!!

Timothy Miller · 08-14-2018, 02:59 PM

Is there by any chance that you're on hard-wired and you have the firmware set to disable wifi when it detects an ethernet connection? I know several laptops that have that option. Just a random stab in the dark as to something that could cause it to show hard blocked.

TB0ne · 08-14-2018, 03:02 PM

Quote:

Originally Posted by alveeru

Thank you TB0ne for you time, however i have tried all 3 ways ...but none of worked...in my laptop there is no option of switch for on or off wifi.
2nd Fn+F2 doesn't work as well. i have tried "sudo rfkill unblock all" as well. still no luck. it is working perfectly fine in windows 10 but not in ubuntu. i didn't get it how i can enable it through windows 10 for ubuntu.

Re-read my last post, please. I also posted to do "FN-ALT-F2"...did you try that? I asked if you were using Windows, and apparently you are...how are you shutting Windows down, and is wifi enabled there??? Have you checked the BIOS to make sure the device is on? Without trying what was suggested previously, there isn't much we can help with.

Again, try FN-ALT-F2 and make sure that Windows has the device enabled. Do **NOT** hibernate/sleep windows, but do a system shutdown, before booting into Linux.