Public bug reported:

Maybe similar to Bug 1678184
Im working on ubuntu 18.04 (with Kernel 4.15.0-29-generic) on a dell XPS 15-9560
After 20 - 180 Minutes the graphical interface hangs up (i can switch 
workspaces, but not much else) and entering commands like "ls" yields bash: 
input/output error
Reboot is impossible via the command or the button. Short click on power button 
gives me a TTY like view prompting errors for nvme0 ext4 file system errors (i 
will post more exact text on next hangup)

The hangups appear randomly, but often during shutting the lid or plugging in 
power cable, which makes me thing it might be something with ssd power states.
For that reason i added grub parameters like 
"nvme_core.default_ps_max_latency_us=3000" (see Bug 1678184) and ended up fully 
disabling APST by setting it to 0, but the bug still occured.

sudo nvme id-ctrl /dev/nvme0 yields:
NVME Identify Controller:
vid     : 0x1c5c
ssvid   : 0x1c5c
sn      : EJ75N621210105PBR   
mn      : PC300 NVMe SK hynix 1TB                 
fr      : 20005A00
rab     : 1
ieee    : ace42e
cmic    : 0
mdts    : 5
cntlid  : 0
ver     : 10200
rtd3r   : 90f560
rtd3e   : ea60
oaes    : 0
ctratt  : 0
oacs    : 0x16
acl     : 3
aerl    : 3
frmw    : 0x16
lpa     : 0x2
elpe    : 254
npss    : 4
avscc   : 0x1
apsta   : 0x1
wctemp  : 361
cctemp  : 363
mtfa    : 0
hmpre   : 0
hmmin   : 0
tnvmcap : 0
unvmcap : 0
rpmbs   : 0
edstt   : 60
dsto    : 1
fwug    : 0
kas     : 0
hctma   : 0
mntmt   : 0
mxtmt   : 0
sanicap : 0
hmminds : 0
hmmaxd  : 0
sqes    : 0x66
cqes    : 0x44
maxcmd  : 0
nn      : 1
oncs    : 0x1e
fuses   : 0
fna     : 0
vwc     : 0x1
awun    : 255
awupf   : 0
nvscc   : 1
acwu    : 0
sgls    : 0
subnqn  : 
ioccsz  : 0
iorcsz  : 0
icdoff  : 0
ctrattr : 0
msdbd   : 0
ps    0 : mp:5.87W operational enlat:5 exlat:5 rrt:0 rrl:0
          rwt:0 rwl:0 idle_power:- active_power:-
ps    1 : mp:2.40W operational enlat:30 exlat:30 rrt:1 rrl:1
          rwt:1 rwl:1 idle_power:- active_power:-
ps    2 : mp:1.90W operational enlat:100 exlat:100 rrt:2 rrl:2
          rwt:2 rwl:2 idle_power:- active_power:-
ps    3 : mp:0.1000W non-operational enlat:1000 exlat:1000 rrt:3 rrl:3
          rwt:3 rwl:3 idle_power:- active_power:-
ps    4 : mp:0.0060W non-operational enlat:1000 exlat:5000 rrt:3 rrl:3
          rwt:3 rwl:3 idle_power:- active_power:-


sudo nvme get-feature -f 0x0c -H /dev/nvme0 yields:
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
        .................
        Entry[ 1]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        ... and so on ...

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: bionic ssd ubuntu xps

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https://bugs.launchpad.net/bugs/1785715

Title:
  ubuntu hynix ssd I/O Errors after some minutes

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Maybe similar to Bug 1678184
  Im working on ubuntu 18.04 (with Kernel 4.15.0-29-generic) on a dell XPS 
15-9560
  After 20 - 180 Minutes the graphical interface hangs up (i can switch 
workspaces, but not much else) and entering commands like "ls" yields bash: 
input/output error
  Reboot is impossible via the command or the button. Short click on power 
button gives me a TTY like view prompting errors for nvme0 ext4 file system 
errors (i will post more exact text on next hangup)

  The hangups appear randomly, but often during shutting the lid or plugging in 
power cable, which makes me thing it might be something with ssd power states.
  For that reason i added grub parameters like 
"nvme_core.default_ps_max_latency_us=3000" (see Bug 1678184) and ended up fully 
disabling APST by setting it to 0, but the bug still occured.

  sudo nvme id-ctrl /dev/nvme0 yields:
  NVME Identify Controller:
  vid     : 0x1c5c
  ssvid   : 0x1c5c
  sn      : EJ75N621210105PBR   
  mn      : PC300 NVMe SK hynix 1TB                 
  fr      : 20005A00
  rab     : 1
  ieee    : ace42e
  cmic    : 0
  mdts    : 5
  cntlid  : 0
  ver     : 10200
  rtd3r   : 90f560
  rtd3e   : ea60
  oaes    : 0
  ctratt  : 0
  oacs    : 0x16
  acl     : 3
  aerl    : 3
  frmw    : 0x16
  lpa     : 0x2
  elpe    : 254
  npss    : 4
  avscc   : 0x1
  apsta   : 0x1
  wctemp  : 361
  cctemp  : 363
  mtfa    : 0
  hmpre   : 0
  hmmin   : 0
  tnvmcap : 0
  unvmcap : 0
  rpmbs   : 0
  edstt   : 60
  dsto    : 1
  fwug    : 0
  kas     : 0
  hctma   : 0
  mntmt   : 0
  mxtmt   : 0
  sanicap : 0
  hmminds : 0
  hmmaxd  : 0
  sqes    : 0x66
  cqes    : 0x44
  maxcmd  : 0
  nn      : 1
  oncs    : 0x1e
  fuses   : 0
  fna     : 0
  vwc     : 0x1
  awun    : 255
  awupf   : 0
  nvscc   : 1
  acwu    : 0
  sgls    : 0
  subnqn  : 
  ioccsz  : 0
  iorcsz  : 0
  icdoff  : 0
  ctrattr : 0
  msdbd   : 0
  ps    0 : mp:5.87W operational enlat:5 exlat:5 rrt:0 rrl:0
            rwt:0 rwl:0 idle_power:- active_power:-
  ps    1 : mp:2.40W operational enlat:30 exlat:30 rrt:1 rrl:1
            rwt:1 rwl:1 idle_power:- active_power:-
  ps    2 : mp:1.90W operational enlat:100 exlat:100 rrt:2 rrl:2
            rwt:2 rwl:2 idle_power:- active_power:-
  ps    3 : mp:0.1000W non-operational enlat:1000 exlat:1000 rrt:3 rrl:3
            rwt:3 rwl:3 idle_power:- active_power:-
  ps    4 : mp:0.0060W non-operational enlat:1000 exlat:5000 rrt:3 rrl:3
            rwt:3 rwl:3 idle_power:- active_power:-

  
  sudo nvme get-feature -f 0x0c -H /dev/nvme0 yields:
  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
        .................
        Entry[ 1]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        ... and so on ...

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