Public bug reported:

Since before the release of Yakkety Yak, I've been having problems with
a new laptop with a Samsung nvme device: 05:00.0 Non-Volatile memory
controller: Samsung Electronics Co Ltd Device a804 (prog-if 02 [NVM
Express])

For whatever reason, I sometimes (often) loose connection to the device,
causing the entire system to stop working until a powercycle has been
completed. I can go a full day without having the problem - Just as I
can have an entire night of the system just refusing to be stable for
long enough to be usable.

I've tried with official kernels and mainline kernels of 4.8 and 4.9
versions of the kernel, but all show the exact same problem at one point
or another.

I'm aware that this COULD be a hardware-related issue, but have no real
way to be certain at this point. The system is a brand new Lenovo
ThinkPad T460s.

Dmesg always shows the following few lines, in association with the
error:

kern  :warn  : [Nov12 03:34] nvme 0000:05:00.0: Failed status: 0xffffffff, 
reset controller.
kern  :warn  : [  +0,017726] pci_raw_set_power_state: 40 callbacks suppressed
kern  :info  : [  +0,000004] nvme 0000:05:00.0: Refused to change power state, 
currently in D3
kern  :warn  : [  +0,000091] nvme nvme0: Removing after probe failure status: 
-19
kern  :info  : [  +0,000013] nvme0n1: detected capacity change from 
1024209543168 to 0

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: linux-image-4.8.0-27-generic 4.8.0-27.29
ProcVersionSignature: Ubuntu 4.8.0-27.29-generic 4.8.1
Uname: Linux 4.8.0-27-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  thms       1592 F.... pulseaudio
CurrentDesktop: GNOME
Date: Sat Nov 12 11:59:50 2016
HibernationDevice: RESUME=UUID=aeb50d49-fb7a-4e4c-928c-582e6a77ad7e
InstallationDate: Installed on 2016-10-15 (28 days ago)
InstallationMedia: Ubuntu-GNOME 16.10 "Yakkety Yak" - Release amd64 (20161012.1)
MachineType: LENOVO 20FAS43T00
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-27-generic.efi.signed 
root=UUID=881c937d-6215-43a5-b57a-257adaee046b ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.8.0-27-generic N/A
 linux-backports-modules-4.8.0-27-generic  N/A
 linux-firmware                            1.161
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/08/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: N1CET47W (1.15 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20FAS43T00
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:bvrN1CET47W(1.15):bd08/08/2016:svnLENOVO:pn20FAS43T00:pvrThinkPadT460s:rvnLENOVO:rn20FAS43T00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20FAS43T00
dmi.product.version: ThinkPad T460s
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug third-party-packages yakkety

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https://bugs.launchpad.net/bugs/1641322

Title:
  frequently lost connection to nvme

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