I have the same problem on Thinkpad X1 Carbon 5th gen with NVMe drive. I get read-only rootfs every time I suspend my laptop (e.g. by closing the laptop's lid).
Things were fine under Ubuntu Xenial 16.04. Once I upgraded to the latest LTS 18.04 the problem started. I was using the toshiba NVMe drive (256GB). Then I upgraded to the following drive (samsung ssd 970 evo 500GB) however the problem persisted: # nvme id-ctrl /dev/nvme0 NVME Identify Controller: vid : 0x144d ssvid : 0x144d sn : S4EVNG0M217854Y mn : Samsung SSD 970 EVO Plus 500GB fr : 1B2QEXM7 rab : 2 ieee : 002538 cmic : 0 mdts : 9 cntlid : 4 ver : 10300 rtd3r : 30d40 rtd3e : 7a1200 oaes : 0 ctratt : 0 oacs : 0x17 acl : 7 aerl : 3 frmw : 0x16 lpa : 0x3 elpe : 63 npss : 4 avscc : 0x1 apsta : 0x1 wctemp : 358 cctemp : 358 mtfa : 0 hmpre : 0 hmmin : 0 tnvmcap : 500107862016 unvmcap : 0 rpmbs : 0 edstt : 35 dsto : 0 fwug : 0 kas : 0 hctma : 0x1 mntmt : 356 mxtmt : 358 sanicap : 0 hmminds : 0 hmmaxd : 0 sqes : 0x66 cqes : 0x44 maxcmd : 0 nn : 1 oncs : 0x5f fuses : 0 fna : 0x5 vwc : 0x1 awun : 1023 awupf : 0 nvscc : 1 acwu : 0 sgls : 0 subnqn : ioccsz : 0 iorcsz : 0 icdoff : 0 ctrattr : 0 msdbd : 0 ps 0 : mp:7.80W operational enlat:0 exlat:0 rrt:0 rrl:0 rwt:0 rwl:0 idle_power:- active_power:- ps 1 : mp:6.00W operational enlat:0 exlat:0 rrt:1 rrl:1 rwt:1 rwl:1 idle_power:- active_power:- ps 2 : mp:3.40W operational enlat:0 exlat:0 rrt:2 rrl:2 rwt:2 rwl:2 idle_power:- active_power:- ps 3 : mp:0.0700W non-operational enlat:210 exlat:1200 rrt:3 rrl:3 rwt:3 rwl:3 idle_power:- active_power:- ps 4 : mp:0.0100W non-operational enlat:2000 exlat:8000 rrt:4 rrl:4 rwt:4 rwl:4 idle_power:- active_power:- I tried different kernels. 4.15.18 , 4.20.17 , 5.1.15. Currently on: 4.15.18-041518-generic #201804190330 SMP Thu Apr 19 07:34:21 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux None seem to fix it. I tried the suggested solution by setting nvme_core.default_ps_max_latency_us= to 5500, 200, and 0 Currently using: nvme_core.default_ps_max_latency_us=0 APST is now disabled: # nvme get-feature -f 0x0c -H /dev/nvme0 get-feature:0xc (Autonomous Power State Transition), Current value:00000000 Autonomous Power State Transition Enable (APSTE): Disabled Auto PST Entries ................. Entry[ 0] ................. Idle Time Prior to Transition (ITPT): 0 ms Idle Transition Power State (ITPS): 0 The problem persists however.... As soon as I close the lid / suspend the laptop, it won't recover from this suspend, instead it hangs with the black screen with EXT4-fs error (device nvme0n1p2) : I/O error while writing superblock and so on... Is there any solution to this yet? Thanks -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1805816 Title: APST quirk needed for PM951 Samsung 1TB NVMe Drive Status in linux package in Ubuntu: Won't Fix 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1805816/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp