Wi Fi connection in Ubuntu 16.04 LTS Beta 2 not stable and gets connected quite late

What is the output of:

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

Thanks

The output of sudo lshw -C network is:

triyambakesh@triyambakesh-Aspire-5740:~$ sudo lshw -C network
[sudo] password for triyambakesh:
  *-network
       description: Ethernet interface
       product: NetLink BCM57780 Gigabit Ethernet PCIe
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: enp2s0
       version: 01
       serial: 00:26:2d:8c:49:af
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 duplex=half firmware=sb latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:28 memory:f0400000-f040ffff
  *-network
       description: Wireless interface
       product: AR928X Wireless Network Adapter (PCI-Express)
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: wlp4s0
       version: 01
       serial: c4:17:fe:c1:e3:46
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=ath9k driverversion=4.4.0-15-generic firmware=N/A ip=192.168.0.107 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
       resources: irq:17 memory:f0500000-f050ffff

The Output of lsb_release -a is:

triyambakesh@triyambakesh-Aspire-5740:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Xenial Xerus (development branch)
Release: 16.04
Codename: xenial

The Output of uname -a is:

triyambakesh@triyambakesh-Aspire-5740:~$ uname -a
Linux triyambakesh-Aspire-5740 4.4.0-15-generic #31-Ubuntu SMP Fri Mar 18 19:06:37 UTC 2016 i686 i686 i686 GNU/Linux

The Output of sudo iwlist scan | egrep -i 'chan|ssid' is:

triyambakesh@triyambakesh-Aspire-5740:~$ sudo iwlist scan | egrep -i 'chan|ssid'lo Interface doesn't support scanning.

enp2s0 Interface doesn't support scanning.

                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"DESPERADO"
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:""
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"AMITAVA"
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    ESSID:"AndroidAP"
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    ESSID:"SUMANTA MUKHERJEE"

Please first connect your network card to the wireless router using an ethernet cable (also known as a LAN cable) and apply all updates.

In order to gather essential troubleshooting information about your wireless card, please follow this procedure:

Step 1

In the Ubuntu Terminal console , make sure that unlimited scrolling is enabled:

click on Edit > Profiles > "Default" profile > Scrolling. Choose "Unlimited" as scrolling option. Click Close and Close again.

If you are using the Gnome interface, open the Terminal console via "Applications->Accessories->Terminal"

If you are using the Unity interface (default graphical user interface in Ubuntu), use the 'search' function on the dash. Or you can click on the 'More Apps' button, click on the 'See more results' by the installed section, and find it in that list of applications. A third way, available after you click on the 'More Apps' button, is to go to the search bar, and see that the far right end of it says 'All Applications'. You then click on that, and you'll see the full list. Then you can go to Accessories > Terminal after that.

So the methods in Unity are:

Press CTRL-ALT-T key combination.

Dash > Search for Terminal

Dash > More Apps > 'See More Results' > Terminal

Dash > More Apps > Accessories > Terminal

Step 2

Please copy-paste the following diagnostic command from the

https://help.ubuntu.com/community/WirelessTroubleshootingProcedure

website using a web browser (like Google Chromium or Mozilla Firefox) into the Linux Terminal. The command STARTS with the word sudo and ENDS with the word lsmod. So please copy-paste the ENTIRE diagnostic command below from the web browser into a Terminal, press <enter>, then enter password when sudo asks for password, then press enter again.

Tip: If you have a wheel mouse or 3 button mouse you do not need to type commands into the Terminal. Highlight the diagnostic command written on the page. Move your cursor anywhere in the Terminal and press the wheel or middle button. Automatic Copy and paste! No spelling mistakes! No Typos! No other errors!

sudo apt-get update; sudo apt-get install usbutils pciutils hwinfo grep rfkill; sudo lshw -C network; rfkill list; sudo iwlist scan | grep -Ei 'chan|ssid'; cat /etc/network/interfaces; cat /etc/lsb-release; lspci -nnk | grep -iA2 net; lsusb; nmcli nm status; sudo lshw -short; uname -a; sudo updatedb; dmesg | grep -E '02:00|80211|acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|ireless|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|ound|p54|prism|rror|rtl|RTL|rt2|RT2|rt3|RT3|rt5|RT5|rt6|RT6|rt7|RT7|usb|witch|wl';sudo dmidecode|grep -E 'anufact|roduct|erial|elease'; iwconfig; grep -E '80211|acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|p54|prism|rtl|rt2|rt3|rt6|rt7|wmi|witch|wl' /etc/modprobe.d/*; cat /var/lib/NetworkManager/NetworkManager.state; sudo hwinfo --netcard ; ps -aux|grep -E 'wpa|icd|etwork'; netstat -rn ; cat /etc/resolv.conf; ls -lia /boot; grep tmpfs /etc/fstab; ubuntu-support-status; sudo update-pciids; sudo update-usbids; sudo lsmod

Step 3

Please do NOT attempt to send any attachment(s). Please copy/paste the full terminal output at this location:

https://answers.launchpad.net/ubuntu/+question/289898

The troubleshooters at Launchpad need to see the full Terminal output from running the above diagnostic command.

Step 4

Please also specify the exact model and make of your PC (if known)

Please also specify the name of the wireless access point that you are trying to connect to (not the model/make of your router).

Thanks. My Problem got solved with the above solution by Andrew. Thanks Andrew.

Thanks actionparsnip, that solved my question.

Hi andrew-woodhead666, aka actionparsnip,
this solved my issue too.
Many thanks and regards.
Karel

Too quick with my comment.
It did not solve my problem.
I do have connection with WiFi, but no real connection with the internet....
I've entered the correct passphrase though.