Public bug reported:
**Steps to reproduce:**
1. Install Ubuntu 26 (kernel 7.0.0-22-generic) with a Lexar SSD NM800PRO 2TB
(firmware 3.7.F.V, PCI ID 0x1d97) as a secondary drive
2. Mount an ext4 filesystem on the drive
3. Leave the system idle
**What happens:**
- Drive enters APST power state 3 after 100ms idle (exit latency 5000ms)
- Controller becomes unresponsive, returning EIO (`error -5`) on directory
block reads
- ext4 remounts filesystem as `emergency_ro,shutdown`
- `nvme set-feature` to disable APST hangs indefinitely and never completes
- `smartctl` and `nvme smart-log` return `Input/output error` during the hang
**What should happen:**
- APST transitions should not cause controller hangs and I/O errors
**Workaround:**
- Add `nvme_core.default_ps_max_latency_us=0` to `GRUB_CMDLINE_LINUX_DEFAULT`
**Hardware:**
- Drive: Lexar SSD NM800PRO 2TB, firmware 3.7.F.V, PCI vendor 0x1d97
- Kernel: 7.0.0-22-generic
- APST config at time of failure: 100ms idle → power state 3 (500ms entry,
5000ms exit latency)
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-22-generic 7.0.0-22.22
ProcVersionSignature: Ubuntu 7.0.0-22.22-generic 7.0.0
Uname: Linux 7.0.0-22-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: mlacayo 6400 F.... pipewire
mlacayo 6420 F.... wireplumber
/dev/snd/controlC0: mlacayo 6420 F.... wireplumber
/dev/snd/seq: mlacayo 6400 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Jun 11 10:25:21 2026
InstallationDate: Installed on 2026-05-19 (23 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: LENOVO 20TK002EMZ
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 nvidia-drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-22-generic
root=UUID=21a5b96e-c29c-4218-bbce-9f1909d2fadf ro quiet splash
nvme_core.default_ps_max_latency_us=0
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/04/2025
dmi.bios.release: 1.38
dmi.bios.vendor: LENOVO
dmi.bios.version: N2VET53W (1.38 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20TK002EMZ
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.ec.firmware.release: 1.12
dmi.modalias:
dmi:bvnLENOVO:bvrN2VET53W(1.38):bd12/04/2025:br1.38:efr1.12:svnLENOVO:pn20TK002EMZ:pvrThinkPadX1ExtremeGen3:rvnLENOVO:rn20TK002EMZ:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20TK_BU_Think_FM_ThinkPadX1ExtremeGen3:pfaThinkPadX1ExtremeGen3:
dmi.product.family: ThinkPad X1 Extreme Gen 3
dmi.product.name: 20TK002EMZ
dmi.product.sku: LENOVO_MT_20TK_BU_Think_FM_ThinkPad X1 Extreme Gen 3
dmi.product.version: ThinkPad X1 Extreme Gen 3
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug apst nvme resolute wayland-session
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https://bugs.launchpad.net/bugs/2156436
Title:
Lexar NM800PRO 2TB NVMe causes EIO errors and filesystem corruption
due to aggressive APST on Ubuntu 26
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