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I have successfully installed ubuntu 14.4 LTS alongside with Window 10 in my new Aspire E15 E5-573G-779S. WiFi auto detection in Window 10 is ok but not in Ubuntu 14.04. Appreciate if anyone can help to advise. Thanks. Results of lspci -nnk | grep 0280 -A2 shows 

03:00.0 Network controller [0280]: Qualcomm Atheros Device [168c:0042] (rev 30)
    Subsystem: Lite-On Communications Inc Device [11ad:0806]
04:00.0 3D controller [0302]: NVIDIA Corporation Device [10de:1299] (rev a1)
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marked as duplicate by Jeremy31, Eric Carvalho, David Foerster, Community♦ Feb 20 '16 at 23:15

This question was marked as an exact duplicate of an existing question.
    
Let's start by identifying your wireless device. Please edit your question to add the result of this terminal command: lspci -nnk | grep 0280 -A2 Welcome to askubuntu. – chili555 Feb 8 '16 at 21:13
    
Thx for the infor. But I can't try it out as my dual boot now fail to boot into ubuntu. I have to get back my dual boot first. – Casey Yeow Feb 9 '16 at 13:36
    
OK. Now my dual boot (window10 n ubuntu 15.10) is back and running. Yes I went through the above link of possible duplicate but I can't figure out what should do next. Pls help to shed some light. – Casey Yeow Feb 20 '16 at 3:55
    
What I meant was the changes done in the possible duplicate looks "intimidating". For Ubuntu 15.10, perhaps there is better solution? – Casey Yeow Feb 20 '16 at 4:04
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First of all, can you connect to any Wi-Fi manually in your Ubuntu system?

If your machine is a laptop, you need to make sure the Wi-Fi adapter (or "wireless network") is toggled ON when using Ubuntu. On most laptops there is a hardware toggle that controls this. You may want to check your BIOS settings, too, because there might be a software toggle there.

Usually you can enter your BIOS settings by pressing and holding key F2, F10, or Delete during startup when the some logo appears (this is usually referred to as the POST screen), before any operating system loads.

I found a manual for your computer, it is https://content.etilize.com/User-Manual/1027476497.pdf It says you can enter BIOS settings using F2.

In your BIOS settings there might be an option that turns on your Wi-Fi adapter at startup.

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Thx for the detail. Pls pardon me if I ask a obvious clarification before I try it out. Your bios setting, is it in Window 10 or ubuntu environment? The wifi auto detection in window 10 has no problem originally, isn't that shows that bios setting is on already? – Casey Yeow Feb 8 '16 at 22:50
    
@CaseyYeow No. BIOS is independent from any OS. The thing is different OS might be play with the software toggles in different ways, which may lead to the issue you described. However, I am still not very clear what "Wi-Fi auto detection" is. Are you talking about "Wi-Fi auto connection" or "Wi-Fi discovery"? Can you connect to Wi-Fi in Ubuntu? – bfrguci Feb 9 '16 at 2:51
    
@CaseyYeow If you cannot even connect to Wi-Fi, it might be something wrong with your driver as is suggested in a comment to your question. – bfrguci Feb 9 '16 at 2:52
    
Yes WiFi discovery . It is working in window 10 but not in Ubuntu, as the title of this thread meant. – Casey Yeow Feb 9 '16 at 3:06
    
In window 10 , WiFi can be discovered and connected, but not in Ubuntu , cannot be discovered or detected. – Casey Yeow Feb 9 '16 at 3:10
up vote -1 down vote

Try to put the Wi-Fi on ALWAYS ON in the BIOS. In my experience this will solve the problem.

Good luck!

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Hi, sorry, how do you do that in Window 10? Thx. – Casey Yeow Feb 8 '16 at 22:03
    
You cannot do that in windows, it has to be done on startup of your computer. Like explained by "bfrguci" you need to hold F2 on startup of your computer. So when you restart, hold F2 as soon as the screen goes black. Check his link for the user manual to see where you need to go in the bios menu. – E.F. Nijboer Feb 8 '16 at 23:17
    
Sorry I didn't make my comment clearer. I am having dual-boot now, so which os to choose for starting up, to do this? – Casey Yeow Feb 8 '16 at 23:25
    
This is before you choose the OS. The BIOS (basic input output system) is a small system program built into the computer motherboard and is responsible for basic system settings and loading the os. So right the second your system starts up you need to press F2. So keep pressing F2 when you start up your computer. – E.F. Nijboer Feb 8 '16 at 23:29
    
I tried that just now n I can't find WiFi setting. So I exit n it asked me to save n exit. After I exit and reboot again, funny that my dual boot is gone!? Now it always go into window 10. Any idea why? – Casey Yeow Feb 8 '16 at 23:43

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