> On 28 Oct 2017, at 9:10 PM, Bashar <email address hidden> wrote:
> 
> Same problem here on a Lenovo ideapad Y700 and Ubuntu 16.04
> /dev/nvme0n1    SAMSUNG MZVLW512HMJP-000L2
> 
> I disabled APST by adding nvme_core.default_ps_max_latency_us=0 to the
> kernel parameters in /etc/default/grub and works ok, no blocking since
> then.

Can you file a new bug? Thanks.

> 
> -- 
> You received this bug notification because you are subscribed to linux
> in Ubuntu.
> https://bugs.launchpad.net/bugs/1678184
> 
> Title:
>  APST quirk needed for Samsung 512GB NVMe drive
> 
> Status in linux package in Ubuntu:
>  Fix Released
> Status in linux source package in Yakkety:
>  Fix Released
> Status in linux source package in Zesty:
>  Fix Released
> 
> Bug description:
>  APST support just landed in the latest Zesty kernel (4.10.0-14.16) as
>  part of https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664602.
>  That patch has a quirk for certain 256GB Samsung drives found in Dell
>  laptops that do not behave well when APST is enabled. I am
>  experiencing the same symptoms with the same model laptop except with
>  a 512GB Samsung. Prior to manually disabling APST the drive would die
>  and system would go down in flames with I/O errors within 20 to 40
>  minutes of boot.
> 
>  $ sudo nvme list
>  Node             SN                   Model                                    Namespace Usage                      Format           FW Rev  
>  ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
>  /dev/nvme0n1           ************** PM951 NVMe SAMSUNG 512GB                 1         500.20  GB / 512.11  GB    512   B +  0 B   BXV76D0Q
> 
>  ProblemType: Bug
>  DistroRelease: Ubuntu 17.04
>  Package: linux-image-4.10.0-14-generic 4.10.0-14.16
>  ProcVersionSignature: Ubuntu 4.10.0-14.16-generic 4.10.3
>  Uname: Linux 4.10.0-14-generic x86_64
>  ApportVersion: 2.20.4-0ubuntu2
>  Architecture: amd64
>  AudioDevicesInUse:
>   USER        PID ACCESS COMMAND
>   /dev/snd/controlC0:  ajclayton   3305 F.... pulseaudio
>  CurrentDesktop: Unity:Unity7
>  Date: Fri Mar 31 09:42:38 2017
>  InstallationDate: Installed on 2012-09-08 (1665 days ago)
>  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
>  MachineType: Dell Inc. XPS 15 9550
>  ProcFB: 0 inteldrmfb
>  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-14-generic root=UUID=779e5929-5ffb-49b1-9786-1adcde824b7d ro rootflags=subvol=@ noprompt nouveau.modeset=0 log_buf_len=20M
>  RelatedPackageVersions:
>   linux-restricted-modules-4.10.0-14-generic N/A
>   linux-backports-modules-4.10.0-14-generic  N/A
>   linux-firmware                             1.164
>  SourcePackage: linux
>  UpgradeStatus: Upgraded to zesty on 2017-03-07 (23 days ago)
>  dmi.bios.date: 04/07/2016
>  dmi.bios.vendor: Dell Inc.
>  dmi.bios.version: 01.02.00
>  dmi.board.name: 0N7TVV
>  dmi.board.vendor: Dell Inc.
>  dmi.board.version: A00
>  dmi.chassis.type: 9
>  dmi.chassis.vendor: Dell Inc.
>  dmi.modalias: dmi:bvnDellInc.:bvr01.02.00:bd04/07/2016:svnDellInc.:pnXPS159550:pvr:rvnDellInc.:rn0N7TVV:rvrA00:cvnDellInc.:ct9:cvr:
>  dmi.product.name: XPS 15 9550
>  dmi.sys.vendor: Dell Inc.
> 
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