iwlwifi Error sending STATISTICS_CMD: time out after 2000ms.

[Ville Ranki]

This started happening today so probably a new issue caused by a kernel update.

Randomly, maybe every 45 minutes wifi disconnects and reconnects. Attached is a log output from dmesg. Looks like issue is in the iwlwifi driver. Disconnect causes TCP connections to drop so it's quite annoying for end user.

ThinkPad T460p, up to date kernel on Ubuntu 17.04.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: linux-image-4.10.0-40-generic 4.10.0-40.44
ProcVersionSignature: Ubuntu 4.10.0-40.44-generic 4.10.17
Uname: Linux 4.10.0-40-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.8
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC1D0p: vranki 2298 F...m pulseaudio
 /dev/snd/controlC1: vranki 2298 F.... pulseaudio
 /dev/snd/controlC0: vranki 2298 F.... pulseaudio
CurrentDesktop: X-Cinnamon
Date: Wed Nov 22 16:57:46 2017
HibernationDevice: RESUME=UUID=65d76bf9-e895-4dbb-9424-bfd0d498bd43
InstallationDate: Installed on 2017-03-29 (238 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Beta amd64 (20170321)
MachineType: LENOVO 20FW0042MS
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-40-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.10.0-40-generic N/A
 linux-backports-modules-4.10.0-40-generic N/A
 linux-firmware 1.164.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/26/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: R07ET71W (2.11 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20FW0042MS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrR07ET71W(2.11):bd09/26/2016:svnLENOVO:pn20FW0042MS:pvrThinkPadT460p:rvnLENOVO:rn20FW0042MS:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20FW0042MS
dmi.product.version: ThinkPad T460p
dmi.sys.vendor: LENOVO

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

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Does this issue go away if you boot back into the prior kernel?

[Joseph Salisbury (jsalisbury)]

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

[Ville Ranki (ville-ranki)]

To be realistic I probably won't be testing this with different kernels. It's happening on a production laptop which I need daily and is a bit tricky to reproduce. Maybe someone else suffering from the issue can do the tests.

More info: the bug doesn't happen on every boot. Suspend/resume cycles may trigger it. I haven't found a way to reproduce it reliably.

[Arnau Villoslada (thedegree0)]

I've tested it with 4.14, works like a charm:
$ uname -r
4.14.0-041400-generic

I also tried it with 4.15-rc4 but no luck there, it has the same problem.
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15-rc4/

So far it works but if I were to encounter any problems I'll post the details.

[Arnau Villoslada (thedegree0)]

Taking it back, after almost one week of testing the bug sometimes comes back. I use my laptop on different places and I've noticed that in some networks the problem is more likely to appear than in others. In some the problem never appears, it might be pure chance though.

This problem often comes together with kernel freezes where not even SysRq commands respond.

I'm not sure if I have to or should post logs nor which logs to post to complement this comments. I'll keep an eye here and post anything you need, however, my logs look extremely similar to the ones of Ville Ranki.

I think it's also important to mention that I have a fresh installation, 1 week old, no funny business there.

[Launchpad Janitor (janitor)]

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

[Tom Cook (tom-k-cook)]

I'm still seeing this in 18.04 LTS.

Linux newt 4.15.0-54-generic #58-Ubuntu SMP Mon Jun 24 10:55:24 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

I've attached dmesg output.