WiFi connectivity problem

Asked by Srivathsa on 2016-02-29

Im using Ubuntu 14.04 .I recently started having problem with connecting to the work network at home. The WiFi network is working fine(I checked on other devices). The problem is my laptop doesn't get connected to it or gets connected sometimes but there's no data transfer.

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What is the output of:

sudo lshw -C network; lsb_release -a; uname -a; sudo iwlist scan | egrep -i 'chan|ssid'; sudo rfkill list


Srivathsa (srivathsaeric) said : #2

For -c network I got the details of the network ( physical id:0, broadcast=yes)
lsb_release -a : codename: trusty
egrep... : interface doesn't support scanning
                  Essid: network name
Rfkill list: soft blocked: no
                    Hard blocked: no

Yes, I want the text.

If you copy it to your NTFS partition, you can copy the text in Windows then paste as an update

Manfred Hampl (m-hampl) said : #4

Please provide the full output, and not just the lines that you deem most relevant.

If you run the commands in a terminal window, you can use the terminal window's menu entries "edit - select all" and "edit - copy" to copy all output, for pasting it into the question document without further hassle.

Srivathsa (srivathsaeric) said : #5

sudo lshw -C network


description: Ethernet interface

product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller

vendor: Realtek Semiconductor Co., Ltd.

physical id: 0

bus info: pci@0000:08:00.0

logical name: eth0

version: 07

serial: 5c:b9:01:02:1d:72

size: 10Mbit/s

capacity: 100Mbit/s

width: 64 bits

clock: 33MHz

capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation

configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s

resources: irq:44 ioport:5000(size=256) memory:c6200000-c6200fff memory:c6000000-c6003fff


 description: Wireless interface

product: RTL8723BE PCIe Wireless Network Adapter

vendor: Realtek Semiconductor Co., Ltd.

physical id: 0

bus info: pci@0000:0a:00.0

logical name: wlan0

version: 00

serial: 34:68:95:41:b5:69

width: 64 bits

clock: 33MHz

capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless

configuration: broadcast=yes driver=rtl8723be driverversion=3.19.0-25-generic firmware=N/A ip= latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn

resources: irq:16 ioport:3000(size=256) memory:c6100000-c6103fff

lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty

uname -a

Linux eric-HP-15-Notebook-PC 3.19.0-25-generic #26~14.04.1-Ubuntu SMP Fri Jul 24 21:16:20 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

 sudo iwlist scan | egrep -i 'chan|ssid'

Interface doesn't support scanning.

Interface doesn't support scanning.


 Frequency:2.412 GHz (Channel 1)


sudo rfkill list

0: phy0: Wireless LAN

Soft blocked: no

Hard blocked: no

1: hci
0: Bluetooth

Soft blocked: yes

Hard blocked: no

The wireless interface has an IP address ( in this case). If you run:

ping -c 4

Do you get replies?

Jeremy (wa113y3s) said : #7

Get the laptop as close as possible to the wireless router and see if problems are gone. HP started using one antenna wire instead of two.
If moving the laptop fixes the issue, see http://askubuntu.com/questions/717685/realtek-wifi-card-rtl8723be-not-working-properly/722904#722904

james truax (procon2) said : #8

When this happens to me I hit suspend and cone back in from suspend and resets the network administrator works like a charm. Think it has something to do with the kernel

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