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Ubuntu 15.04 does not detect wifi repeater

Asked by tom

My dell xps 17 will not detect a wifi repeater signal

I can see my wifi router and any supplementary wifi routers fine but am completely unable to detect my repeater
I can connect to the repeater from every other computer in the house including android phones, windows computers and an iPad

My wifi card is a Intel® Centrino® Advanced-N 6230 using the standard iwlwifi driver.

One thing to note is that the wifi repeater is from a different country, has a US plug I believe and I am in New Zealand. I dont know if this will affect anything.

Does anyone know what might cause this?

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tom (tomkellynz) said : 		#1

Wifi router is running on channel 6
Wifi repeater is running on channel 1

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actionparsnip (andrew-woodhead666) said : 		#2

If you run:

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

What is the output of?

Thanks

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actionparsnip (andrew-woodhead666) said : 		#3

Obviously use the other connection to get fully updated. It may help

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tom (tomkellynz) said : 		#4

sudo iwlist scan | egrep -i 'ssid|chan'
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    ESSID:"MySSID"
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"MySSID"

Shows both the router and the repeater

sudo lshw -C network
  *-network
       description: Wireless interface
       product: Centrino Advanced-N 6230 [Rainbow Peak]
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlan0
       version: 34
       serial: 88:53:2e:a5:8b:1f
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=3.19.0-20-generic firmware=18.168.6.1 ip=192.168.20.8 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
       resources: irq:41 memory:f3b00000-f3b01fff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:0a:00.0
       logical name: eth0
       version: 06
       serial: 84:8f:69:c1:9c:0a
       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=rtl_nic/rtl8168e-2.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:38 ioport:2000(size=256) memory:f3004000-f3004fff memory:f3000000-f3003fff

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actionparsnip (andrew-woodhead666) said : 		#5

Are the SSIDs actually identical or did you obfuscate them?

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tom (tomkellynz) said : 		#6

They are identical

I actually feel a little silly right now
After you got me to run those commands I did a little more digging and discovered that power management was forced on on my wifi adapter
I also installed wifi-radar and saw both connections listed, both with awful reception.
I disabled power management and suddenly found that I have perfect signal :S

Sorry for wasting you time and thanks for the help