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[Bug 1927866] Re: Root filesystem becomes readonly frequenty freezing system

Have been using the new kernel on Ubuntu 20.04 since 17th. Have tested
the following scenarios

On power
On battery
Closed Lid
Suspend from Shutdown menu
Cold reboot

Have not seen the crash since then. Anything else to do? Install 21.04
and the custom kernel and try again?

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https://bugs.launchpad.net/bugs/1927866

Title:
Root filesystem becomes readonly frequenty freezing system

Status in linux package in Ubuntu:
Confirmed

Bug description:
I have a brand new Lenovo Ideapad Flex 5.14 which came with Windows 10
and I have installed Ubuntu 21.04 with dual boot.

I am running into this problem where the root filesystem becomes
readonly and the system freezes with a screen full of errors shown
about unable to write to filesystem.

I booted into a live boot usb and did fsck and e2fsck but did not see
any errors there. I read online that this could be because of io
errors but smartctl and fsck does not show any errors

So I was wondering if this could be a bug vs a hardward issue. Please
let me know if you need any further information from the system.

=============================================================
=============================================================

fdisk -l /dev/nvme0n1
Disk /dev/nvme0n1: 476.94 GiB, 512110190592 bytes, 1000215216 sectors
Disk model: WDC PC SN530 SDBPMPZ-512G-1101
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: E8803E28-C4F7-4FA5-9B6D-0F3CAB7027A5

Device Start End Sectors Size Type
/dev/nvme0n1p1 2048 534527 532480 260M EFI System
/dev/nvme0n1p2 534528 567295 32768 16M Microsoft reserved
/dev/nvme0n1p3 567296 199446527 198879232 94.8G Microsoft basic data
/dev/nvme0n1p4 998166528 1000214527 2048000 1000M Windows recovery environmen
/dev/nvme0n1p5 199446528 203352063 3905536 1.9G Linux filesystem
/dev/nvme0n1p6 203352064 219353087 16001024 7.6G Linux swap
/dev/nvme0n1p7 219353088 414664703 195311616 93.1G Linux filesystem
/dev/nvme0n1p8 414664704 998166527 583501824 278.2G Microsoft basic data

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smartctl -a /dev/nvme0
smartctl 7.2 2020-12-30 r5155 [x86_64-linux-5.11.0-16-generic] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number: WDC PC SN530 SDBPMPZ-512G-1101
Serial Number: 205135806243
Firmware Version: 21160001
PCI Vendor/Subsystem ID: 0x15b7
IEEE OUI Identifier: 0x001b44
Total NVM Capacity: 512,110,190,592 [512 GB]
Unallocated NVM Capacity: 0
Controller ID: 1
NVMe Version: 1.4
Number of Namespaces: 1
Namespace 1 Size/Capacity: 512,110,190,592 [512 GB]
Namespace 1 Formatted LBA Size: 512
Namespace 1 IEEE EUI-64: 001b44 8b484daff7
Local Time is: Sun May 9 12:45:05 2021 EDT
Firmware Updates (0x14): 2 Slots, no Reset required
Optional Admin Commands (0x0017): Security Format Frmw_DL Self_Test
Optional NVM Commands (0x005f): Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat Timestmp
Log Page Attributes (0x1e): Cmd_Eff_Lg Ext_Get_Lg Telmtry_Lg Pers_Ev_Lg
Maximum Data Transfer Size: 128 Pages
Warning Comp. Temp. Threshold: 80 Celsius
Critical Comp. Temp. Threshold: 85 Celsius
Namespace 1 Features (0x02): NA_Fields

Supported Power States
St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat
 0 + 3.50W 2.10W - 0 0 0 0 0 0
 1 + 2.40W 1.60W - 0 0 0 0 0 0
 2 + 1.90W 1.50W - 0 0 0 0 0 0
 3 - 0.0250W - - 3 3 3 3 3900 11000
 4 - 0.0050W - - 4 4 4 4 5000 39000

Supported LBA Sizes (NSID 0x1)
Id Fmt Data Metadt Rel_Perf
 0 + 512 0 2
 1 - 4096 0 1

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02)
Critical Warning: 0x00
Temperature: 35 Celsius
Available Spare: 100%
Available Spare Threshold: 10%
Percentage Used: 0%
Data Units Read: 624,535 [319 GB]
Data Units Written: 526,042 [269 GB]
Host Read Commands: 4,462,163
Host Write Commands: 4,686,788
Controller Busy Time: 25
Power Cycles: 20
Power On Hours: 76
Unsafe Shutdowns: 9
Media and Data Integrity Errors: 0
Error Information Log Entries: 1
Warning Comp. Temperature Time: 0
Critical Comp. Temperature Time: 0

Error Information (NVMe Log 0x01, 16 of 256 entries)
No Errors Logged

=============================================================
=============================================================

cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/nvme0n1p7 during installation
UUID=3167581c-60b0-4db8-972c-a8dfafc882c5 / ext4 errors=remount-ro 0 1
# /boot was on /dev/nvme0n1p5 during installation
UUID=9c06f7c8-ad3b-4b90-b32c-4d4099b4548d /boot ext4 defaults 0 2
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=6C28-8155 /boot/efi vfat umask=0077 0 1
# swap was on /dev/nvme0n1p6 during installation
UUID=38034881-4f37-4d16-8cc5-e343f61b4ef7 none swap sw 0 0
/dev/disk/by-uuid/0F7EA5A832F72C99 /mnt/0F7EA5A832F72C99 auto nosuid,nodev,nofail,x-gvfs-show 0 0

=============================================================
=============================================================

nvme error-log shows the same error message as below, all 64 of them
are identical. Pasting one item here.

nvme error-log /dev/nvme0
Error Log Entries for device:nvme0 entries:64
.................
Entry[ 0]
.................
error_count : 0
sqid : 0
cmdid : 0
status_field : 0(SUCCESS: The command completed successfully)
parm_err_loc : 0
lba : 0
nsid : 0
vs : 0
trtype : The transport type is not indicated or the error is not transport related.
cs : 0
trtype_spec_info: 0
.................
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu65
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: anoopjohn 1695 F.... pulseaudio
/dev/snd/pcmC1D0p: anoopjohn 1695 F...m pulseaudio
/dev/snd/controlC0: anoopjohn 1695 F.... pulseaudio
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 21.04
InstallationDate: Installed on 2021-04-30 (11 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
MachineType: LENOVO 82HU
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.11.0-16-generic root=UUID=3167581c-60b0-4db8-972c-a8dfafc882c5 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
RelatedPackageVersions:
linux-restricted-modules-5.11.0-16-generic N/A
linux-backports-modules-5.11.0-16-generic N/A
linux-firmware 1.197
Tags: hirsute wayland-session
Uname: Linux 5.11.0-16-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 02/23/2021
dmi.bios.release: 1.19
dmi.bios.vendor: LENOVO
dmi.bios.version: GJCN19WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: IdeaPad Flex 5 14ALC05
dmi.ec.firmware.release: 1.12
dmi.modalias: dmi:bvnLENOVO:bvrGJCN19WW:bd02/23/2021:br1.19:efr1.12:svnLENOVO:pn82HU:pvrIdeaPadFlex514ALC05:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct31:cvrIdeaPadFlex514ALC05:
dmi.product.family: IdeaPad Flex 5 14ALC05
dmi.product.name: 82HU
dmi.product.sku: LENOVO_MT_82HU_BU_idea_FM_IdeaPad Flex 5 14ALC05
dmi.product.version: IdeaPad Flex 5 14ALC05
dmi.sys.vendor: LENOVO

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