Comment 90 for bug 1574347

I am pretty sure I'm having this problem on a Toshiba Chromebook 2 (CB35-B3340) running 16.04 fully updated as of this week. I get the ethernet up/down arrows, there is no ethernet on this laptop. I also get the state where it is disconnected and not showing any wifi networks. It seems to be related to suspend/wake, but doesn't always happen.

$ lspci |grep -i net
01:00.0 Network controller: Intel Corporation Wireless 7260 (rev bb)

ii network-manager 1.2.0-0ubuntu0.16.04.3 amd64
ii network-manager-gnome 1.2.0-0ubuntu0.16.04.3 amd64
ii network-manager-pptp 1.1.93-1ubuntu1 amd64
ii network-manager-pptp-gnome 1.1.93-1ubuntu1 amd64

Running this got things back to normal:
$ sudo service network-manager restart

This looked noteworthy:

# dmesg |grep iwl
[ 10.658028] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-7260-17.ucode failed with error -2
[ 11.064468] iwlwifi 0000:01:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
[ 11.545992] iwlwifi 0000:01:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144
[ 11.546081] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled
[ 11.546326] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled
[ 11.771068] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 11.777060] iwlwifi 0000:01:00.0 wlp1s0: renamed from wlan0
[ 12.285642] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled
[ 12.285883] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled
[ 12.491349] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled
[ 12.491592] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled
[ 461.381354] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled
[ 461.381596] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled