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Borea Deitz
Asked: 2016-07-29 16:18:20 +0800 CST

Is my poor wireless connection the result of a bad driver?

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I've just installed Kubuntu 16.04 on a Lenovo T560 Thinkpad. The wireless connection works poorly - on startup, it won't search for wireless networks (there's also no UI element available to prompt a search for networks, but that's a different complaint). And when a wireless network is found, it routinely drops the connection.

Basically, I have to keep a terminal open to run $ sudo service network-manager restart almost constantly. None of the other devices that use the network have a similar problem.

Is this likely a driver issue? The wireless device is 

product: Wireless 8260
vendor: Intel Corporation

and I'm using the iwlwifi driver.

Edit: here's the output of dmesg | grep iwl:

[ 4.853206] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-19.ucode failed with error -2 [ 4.853222] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-18.ucode failed with error -2 [ 4.853231] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-8000C-17.ucode failed with error -2 [ 4.853602] iwlwifi 0000:04:00.0: Unsupported splx structure [ 4.864965] iwlwifi 0000:04:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm [ 4.904463] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208 [ 4.904778] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 4.905880] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 5.050828] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' [ 5.054589] iwlwifi 0000:04:00.0 wlp4s0: renamed from wlan0 [ 5.399303] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 5.400038] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 5.540881] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 5.541309] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 1668.562182] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 1668.563595] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 1668.702349] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 1668.702959] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 2082.791322] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 2082.792716] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 2082.931669] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 2082.932277] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 2986.102813] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 2986.103733] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 2986.241431] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 2986.241948] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 3183.242126] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 3183.243588] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 3183.381723] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 3183.382147] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 4635.249047] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 4635.250403] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 4635.388702] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 4635.389223] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 7071.802648] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 7071.804023] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 7071.941558] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled [ 7071.942093] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled

drivers

1 Answers

  1. I suggest that you update the firmware files. With a working internet connection, open a terminal and do:

    wget http://mirrors.kernel.org/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.159_all.deb
sudo dpkg -i linux-firmware*.deb

    Reboot. Is there any improvement?

    If there is no improvement, I recommend that you try the steps outlined here: Ubuntu 16.04 wifi Intel 7265 slow/disconnecting

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