networking - Problem with wireless on Toshiba Satellite C55-C

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?

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.