Kernel 4.4.0-96 - WiFi disconnects randomly every 40 / 60 minutes

[indigocat]

Hello,

I have a quirk to report:

in Ubuntu LTS 16.04-based Linux, under kernel 4.4.0-96-generic, WiFi disconnects randomly every 40 / 60 minutes.

Expected: Continuous network connection.

Experienced: Periodic network disconnections, only on this device; the router works fine with all other connected devices, no connection drops.

Hardware: Lenovo ThinkPad T410s, dual Intel/NVIDIA graphics.
Wireless network is managed by the iwlwifi driver (Intel Corporation Centrino Advanced-N 6200, rev 35).

I currently use LTS kernel 4.4.0-96 over the HWE 4.10 line, because the former has a much better performance on mechanical disks than the latter, which is the bottleneck on this generation of laptops.

ProblemType: Bug
DistroRelease: elementary 0.4.1
Package: linux-image-4.4.0-96-generic 4.4.0-96.119 [origin: Ubuntu]
ProcVersionSignature: Ubuntu 4.4.0-96.119-generic 4.4.83
Uname: Linux 4.4.0-96-generic x86_64
NonfreeKernelModules: nvidia_uvm wl nvidia
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: dmayr 2145 F.... pulseaudio
 /dev/snd/controlC0: dmayr 2145 F.... pulseaudio
CRDA:
 country CL: DFS-JP
  (2402 - 2482 @ 40), (N/A, 20), (N/A)
  (5170 - 5250 @ 80), (N/A, 20), (N/A)
  (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS
  (5735 - 5835 @ 80), (N/A, 20), (N/A)
CurrentDesktop: Pantheon
Date: Sun Oct 8 14:52:25 2017
HibernationDevice: RESUME=UUID=3d6a9502-73b8-453a-a536-ab49895e542a
InstallationDate: Installed on 2017-09-24 (14 days ago)
InstallationMedia: elementary OS 0.4.1 "Loki" - Stable amd64 (20170814)
MachineType: LENOVO 2924BV6
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-96-generic root=UUID=b6a6db9e-1dcb-4a1e-a59f-f8c72a89b949 ro persistent quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-96-generic N/A
 linux-backports-modules-4.4.0-96-generic N/A
 linux-firmware 1.157.12
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/11/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 6UET70WW (1.50 )
dmi.board.name: 2924BV6
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6UET70WW(1.50):bd10/11/2012:svnLENOVO:pn2924BV6:pvrThinkPadT410s:rvnLENOVO:rn2924BV6:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2924BV6
dmi.product.version: ThinkPad T410s
dmi.sys.vendor: LENOVO

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.14 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14-rc4

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]