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I'm relatively inexperienced with Linux. I've done a number of installations, but they were all either pretty much straight out-of-the-box JEDI installations with a UFO box or installations on Raspberry Pi.

This is my first installation on a laptop. The Toshiba C55-C-184 came with Windows 10 pre-installed. I replaced this with Ubuntu 16.04 - I need to install ROS on Ubuntu for an online robotics course - however it looks like I'm failing at the first hurdle!

I've searched the forums and I've seen that several people have had problems with other Toshiba laptops, but I can't find anything that helps. Other (earlier?) Toshiba laptops seem to have used Realtec controllers for wireless connectivity, and most of the solutions that I have seen seem to focus on that. Unfortunately, this one seems to use an Intel controller, so those solutions just don't work.

I ran lspci -knn, and got this output:

lspci -knn | grep -EA2 'Eth|Net'
Network controller [0280]: Intel Corporation Wireless 3160 [8086:08b3] (rev cb)
    Subsystem: Intel Corporation Dual Band Wireless AC 3160 [8086:8170]
    Kernel driver in use: iwlwifi

--

02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 07)
    Subsystem: Toshiba America Info Systems RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [1179:f840]
    Kernel driver in use: r8169
    Kernel modules: r8169

The output from rfkill list all:

rfkill list all
0: Toshiba Bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
1: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

Output from dmesg | grep iwl

dmesg | grep iwl
[   13.853351] iwlwifi 0000:01:00.0: loaded firmware version 17.352738.0 op_mode iwlmvm
[   14.047392] iwlwifi 0000:01:00.0: Detected Intel(R) Dual Band Wireless AC 3160, REV=0x164
[   14.047499] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[   14.047807] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[   14.165552] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[   15.122708] iwlwifi 0000:01:00.0 wlp1s0: renamed from wlan0
[   29.782151] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[   29.782459] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[   29.892142] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled
[   29.892517] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled

Any help will be appreciated. Especially if you can explain why it's not working as well as how I can fix it. I'm always happy to expand my working knowledge of Linux.

UPDATE: Given how many posts I've seen about wifi problems on Toshiba laptops, and since I really cannot find anything to explain why I'm seeing this problem, I've posted a question with Toshiba support to see whether this is a known problem with Toshiba laptops. Maybe they can suggest an answer ...

UPDATE2: Well, I got a reply from Toshiba support:

"The issues you report are most likely software errors and in this case we advise that you reinstall Windows 10."

Not exactly helpful, are they?

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    Please edit the question to include results for rfkill list all – Jeremy31 Apr 25 '17 at 20:47
  • I've added the results as requested @Jeremy31 – sempaiscuba Apr 25 '17 at 22:47
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    Please edit your question to add the result of: dmesg | grep iwl Welcome to Ask Ubuntu. – chili555 Apr 25 '17 at 23:16
  • Added the results as requested @chili555 – sempaiscuba Apr 25 '17 at 23:25
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    We see no reason at all that it is not working. Please tell us more. Does it see networks when you click the Network Manager icon? Does it see your network? Does it try and fail to connect? Does it connect and then drop? Or what, exactly?? – chili555 Apr 26 '17 at 21:31
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At one point I thought that I'd found a solution using wicd as an alternative to network manager, but the it turned out that the connection I was seeing was actually via wired Ethernet (I'd forgotten to unplug the cable. Note to self: don't try diagnosing problems when tired!).

In the end I gave up and sent the laptop back to Toshiba under warranty. It turns out that there was a problem with the laptop's cable harness which they had to replace. It arrived back this morning and now WiFi is working perfectly.

Thank you all again for your help.

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