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https://bugs.launchpad.net/bugs/1805816
Title:
APST quirk needed for PM951 Samsung 1TB NVMe Drive
Status in linux package in Ubuntu:
Incomplete
Bug description:
This is a fresh posted connected to a very similar now-solved bug
("APST quirk needed for Samsung 512GB NVMe drive"):
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1678184
My NVMe is the less-common 1TB version. It exhibits similar (possibly
identical) behaviour but has not yet been quirked.
I've followed up as Comment #101 but maybe I need to open this as a
new issue?
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1678184/comments/101
Specifically - using Kernel 4.19.0 on Mint 19.0 the default APST
settings caused read-only errors within minutes-1 hour, this is fatal.
Disabling APST solves the problem, I have this disabled in GRUB now.
Reducing the APST settings but not disabling them does not stop the
problem.
An example of the read-only result (copied from #101) that occurs if APST is
left in its default state:
Oct 31 11:33:04 ian-XPS-15-9550 kernel: EXT4-fs (dm-1): mounted filesystem
with ordered data mode. Opts: (null)
Oct 31 11:33:04 ian-XPS-15-9550 kernel: EXT4-fs (dm-1): re-mounted. Opts:
errors=remount-ro
Oct 31 11:33:05 ian-XPS-15-9550 kernel: EXT4-fs (nvme0n1p1): mounted
filesystem with ordered data mode. Opts: (null)
Oct 31 15:09:44 ian-XPS-15-9550 kernel: EXT4-fs (dm-1): mounted filesystem
with ordered data mode. Opts: (null)
Oct 31 15:09:44 ian-XPS-15-9550 kernel: EXT4-fs (dm-1): re-mounted. Opts:
errors=remount-ro
Oct 31 15:09:44 ian-XPS-15-9550 kernel: EXT4-fs (nvme0n1p1): mounted
filesystem with ordered data mode. Opts: (null)
I had tried `nvme_core.default_ps_max_latency_us=250` but the read-
only bug persists, it just takes longer to occur. Disabling APST with
`nvme_core.default_ps_max_latency_us=0` has solved the issue.
I've been using my laptop successfully (no read-only errors) for over
a week having disabled APST including many suspend/awaken cycles.
Prior to this every boot would crash and burn with read-only errors
within an hour or so.
This is the drive and kernel (copied from #101):
$ sudo nvme list
Node SN Model Namespace Usage Format FW Rev
---------------- --------------------
---------------------------------------- --------- --------------------------
---------------- --------
/dev/nvme0n1 S2FZNYAG801690 PM951 NVMe SAMSUNG 1024GB 1 314.10 GB / 1.02 TB
512 B + 0 B BXV76D0Q
$ uname -a
Linux ian-XPS-15-9550 4.19.0-041900-generic #201810221809 SMP Mon Oct 22
22:11:45 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ lsb_release -rd
Description: Linux Mint 19 Tara
Release: 19
I am of course happy to upload more info - let me know what's needed?
Could this be added as a quirk to the kernel please?
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: X-Cinnamon
DistroRelease: Linux Mint 19
InstallationDate: Installed on 2018-10-27 (32 days ago)
InstallationMedia: Linux Mint 19 "Tara" - Release amd64 20180717
Package: linux (not installed)
Tags: tara
Uname: Linux 4.19.0-041900-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: X-Cinnamon
DistroRelease: Linux Mint 19
InstallationDate: Installed on 2018-10-27 (32 days ago)
InstallationMedia: Linux Mint 19 "Tara" - Release amd64 20180717
Package: linux (not installed)
Tags: tara
Uname: Linux 4.19.0-041900-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
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