Ubuntu
gnome-nettool package

Ubuntu 14.04.1 Wireless Internet Issue, 2.4 GHz works but 5.0 GHz is "Out of Range".

Asked by Matt

Hello,

I recently got a new computer running Ubuntu(I previously owned a mac), and I've been having problems connecting to the right wifi.

My computer has no problem connecting to the 2.4 GHz wifi, but when I open network preferences and try to select the (separate) 5.0 GHz, it says that the network is 'Out of range'.

PICTURE OF PROBLEM: http://imgur.com/bpdfh9f

All other computers in my house, including a mac and PC, can connect to the 5.0 GHz wifi just fine; my new computer is the only computer in the house that is having these problems.

I read online that one of the possible causes of this problem is that the two wifi's are on the same channel, but I followed the suggested fix for that case and it didn't work.

I have an Arris box as well as a High Powered Gigabit Dual Band Router, which outputs both a 2.4 and 5.0 GHz wifi. My computer has an Internal 802.11B/G/N LAN and Bluetooth Card.

Thank you for your help

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Matt
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Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#1

What is the output of:

sudo lshw -C network

Thanks

Revision history for this message
Matt (matmogleeson) said : 		#2

*-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0.2
       bus info: pci@0000:05:00.2
       logical name: eth0
       version: 0a
       serial: 80:fa:5b:11:2d:18
       size: 10Mbit/s
       capacity: 1Gbit/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 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8411-1_0.0.3 06/18/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:48 ioport:d000(size=256) memory:f2104000-f2104fff memory:f2100000-f2103fff
  *-network
       description: Wireless interface
       product: RTL8723BE PCIe Wireless Network Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:06:00.0
       logical name: wlan0
       version: 00
       serial: ac:b5:7d:d1:ac:8f
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rtl8723be driverversion=3.16.0-38-generic firmware=N/A ip=192.168.3.119 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
       resources: irq:19 ioport:c000(size=256) memory:f7800000-f7803fff

Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#3

Try the below command:

echo "options rtl8723be fwlps=0 swlps=0" | sudo tee /etc/modprobe.d/rtl8723befix.conf > /dev/null

Reboot to test. If it's not useful, run:

sudo rm /etc/modprobe.d/rtl8723befix.conf

Then reboot again.

Revision history for this message
Matt (matmogleeson) said : 		#4

You know what, I just realized that my wireless card doesn't support 5 GHz wifi. I need to get a new one.

Revision history for this message
Matt (matmogleeson) said : 		#5

Thank you for your help, though!