Dell inspiron 17r (5720) wireless does not work

[khaj_vah]

Hello guys,

Just installed ubuntu 12.10 on my dell inspiron 17r but the wireless does not work. When i got this computer, it had ubuntu preinstalled and everything worked fine, (a year ago maybe, i changed everything since then). Now, the bluetooth works but the wifi doesn't.
Here is a link of windows driver (might help): http://www.dell.com/support/drivers/us/en/19/DriverDetails/Product/inspiron-17r-5720?driverId=WTD28&fileid=2969488887I have tried to follow this link http://forums.fedoraforum.org/showthread.php?p=1605451#post1605451 but after i did everything (some different things bc it is not fedora), my system crashed and i had to reinstall ubuntu.

Please help me guys,
Thanks in advance.

[wildmanne39]

Hi, copy and paste this command in the terminal (ctrl+alt+t) please:

wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script
It will download a script and create a text file in your home folder with wireless information so we can see the condition of your wireless at this time and the Mac address, WPA key and WEP key are removed for your security, then reply back, click on the paper clip and attach the netinfo.txt file.
Thanks

[khaj_vah]

First, sorry for lte reply.
Second, the script wasn't working so i ran all the commands manually and write in a file with same name.
check out..


Linux khajvah-Inspiron-5720 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

-->cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.10
DISTRIB_CODENAME=quantal
DISTRIB_DESCRIPTION="Ubuntu 12.10"


-->lspci -nnk | grep -iA2 net
02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Dell Wireless 1704 802.11n + BT 4.0 [1028:0016]
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05)
Subsystem: Dell Device [1028:0565]
Kernel driver in use: r8169


-->lsusb
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0c45:644b Microdia
Bus 002 Device 003: ID 0a5c:21d7 Broadcom Corp.

-->iwconfig
eth0 no wireless extensions.

lo no wireless extensions.

-->rfkill list all
0: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no


-->lsmod
Module Size Used by
snd_hda_codec_hdmi 32007 1
snd_hda_codec_idt 70209 1
parport_pc 32688 0
ppdev 17073 0
rfcomm 46619 12
bnep 18140 2
dell_wmi 12681 0
sparse_keymap 13890 1 dell_wmi
dell_laptop 17369 0
dcdbas 14438 1 dell_laptop
coretemp 13400 0
kvm_intel 132759 0
kvm 414070 1 kvm_intel
ghash_clmulni_intel 13180 0
aesni_intel 51037 0
cryptd 20403 2 ghash_clmulni_intel,aesni_intel
aes_x86_64 17208 1 aesni_intel
snd_hda_intel 33491 3
snd_hda_codec 134212 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
snd_hwdep 13602 1 snd_hda_codec
snd_pcm 96580 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
microcode 22803 0
snd_seq_midi 13324 0
snd_rawmidi 30512 1 snd_seq_midi
uvcvideo 76749 0
snd_seq_midi_event 14899 1 snd_seq_midi
videobuf2_core 32851 1 uvcvideo
videodev 120309 2 uvcvideo,videobuf2_core
videobuf2_vmalloc 12860 1 uvcvideo
videobuf2_memops 13368 1 videobuf2_vmalloc
btusb 18334 0
snd_seq 61521 2 snd_seq_midi,snd_seq_midi_event
bluetooth 209199 22 rfcomm,bnep,btusb
psmouse 95552 0
serio_raw 13215 0
snd_timer 29425 2 snd_pcm,snd_seq
snd_seq_device 14497 3 snd_seq_midi,snd_rawmidi,snd_seq
lpc_ich 17061 0
snd 78734 16 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel ,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_s eq,snd_timer,snd_seq_device
soundcore 15047 1 snd
snd_page_alloc 18484 2 snd_hda_intel,snd_pcm
i915 520519 3
nouveau 895609 0
ttm 83595 1 nouveau
mei 40690 0
mxm_wmi 12979 1 nouveau
drm_kms_helper 46784 2 nouveau,i915
drm 275528 6 nouveau,i915,ttm,drm_kms_helper
i2c_algo_bit 13413 2 nouveau,i915
wmi 19070 3 dell_wmi,nouveau,mxm_wmi
video 19335 2 i915,nouveau
mac_hid 13205 0
lp 17759 0
parport 46345 3 parport_pc,ppdev,lp
r8169 61650 0

-->nm-tool
NetworkManager Tool

State: disconnected

- Device: eth0 -----------------------------------------------------------------
Type: Wired
Driver: r8169
State: unavailable
Default: no
HW Address: 84:8F:69:D3:BE:D6

Capabilities:
Carrier Detect: yes

Wired Properties
Carrier: off


-->cat /var/lib/NetworkManager/NetworkManager.state
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true


-->cat /etc/NetworkManager/NetworkManager.conf
[main]
plugins=ifupdown,keyfile
dns=dnsmasq

[ifupdown]
managed=false

-->cat /etc/NetworkManager/nm-system-settings.conf
cat: /etc/NetworkManager/nm-system-settings.conf: No such file or directory

-->cat /etc/network/interfaces | sed 's/wpa-psk [[:graph:]:]\+/wpa-psk <WPA key removed>/'
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

-->[ -t 0 ] && sudo iwlist scan
eth0 Interface doesn't support scanning.

lo Interface doesn't support scanning.

-->[ ! -t 0 ] && gksudo iwlist scan
NOTHING HERE

-->cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN

-->cat /etc/modprobe.d/blacklist.conf
# This file lists those modules which we don't want to be loaded by
# alias expansion, usually so some other driver will be loaded for the
# device instead.

# evbug is a debug tool that should be loaded explicitly
blacklist evbug

# these drivers are very simple, the HID drivers are usually preferred
blacklist usbmouse
blacklist usbkbd

# replaced by e100
blacklist eepro100

# replaced by tulip
blacklist de4x5

# causes no end of confusion by creating unexpected network interfaces
blacklist eth1394

# snd_intel8x0m can interfere with snd_intel8x0, doesn't seem to support much
# hardware on its own (Ubuntu bug #2011, #6810)
blacklist snd_intel8x0m

# Conflicts with dvb driver (which is better for handling this device)
blacklist snd_aw2

# causes failure to suspend on HP compaq nc6000 (Ubuntu: #10306)
blacklist i2c_i801

# replaced by p54pci
blacklist prism54

# replaced by b43 and ssb.
blacklist bcm43xx

# most apps now use garmin usb driver directly (Ubuntu: #114565)
blacklist garmin_gps

# replaced by asus-laptop (Ubuntu: #184721)
blacklist asus_acpi

# low-quality, just noise when being used for sound playback, causes
# hangs at desktop session start (Ubuntu: #246969)
blacklist snd_pcsp

# ugly and loud noise, getting on everyone's nerves; this should be done by a
# nice pulseaudio bing (Ubuntu: #77010)
blacklist pcspkr

# EDAC driver for amd76x clashes with the agp driver preventing the aperture
# from being initialised (Ubuntu: #297750). Blacklist so that the driver
# continues to build and is installable for the few cases where its
# really needed.
blacklist amd76x_edac


-->dmesg | egrep 'air|ath|carl|at7|iwl|ipw|rtl8|rt2|rt3|rt6|rt7|r81 8|r871|rtl8|tg3|ssb|wl|b43|bcma|brcm|b44|eth1|ndis |wmi|wlan0'
[ 15.327933] wmi: Mapper loaded





I hope this will help :)

[wildmanne39]

Hi, here is the link in need.
http://askubuntu.com/questions/215890/dell-inspiron-5720-wifi-broadcom-bcm43142-ubuntu-12-10/215923#215923
Thanks

[khaj_vah]

Thanks for help but I can not install the package. It says: "Building only for 3.5.0-17-generic
Module build for the currently running kernel was skipped since the
kernel source for this kernel does not seem to be installed.
"
so i cant modprobe the module ...

[khaj_vah]

Nevermind, I installed this: http://packages.ubuntu.com/quantal/linux-headers-generic package now everything works fine...\

THANK YOU VERY MUCH, YOU SAVED ME FROM WINDOWS :)

[da_g_bomb]

Solution worked for me, I now have wireless networks appearing in my network list, thanks

[riezz]

In my case after all this wifi is now enabled but i see no networks.

I'm using kubuntu 12.10.