** Description changed:

  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.
  
- fsck and smartctl 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.
+ 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          
+ 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
  
- 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 does not show any errors
+ =============================================================
+ =============================================================
  
  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
+  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
+  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
+ .................

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

Title:
  Root filesystem becomes readonly frequenty freezing system

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