$ cat /proc/cmdline
BOOT_IMAGE=/@/boot/vmlinuz-4.18.0-3-generic
root=UUID=0885f579-b2ff-4c94-964c-d65c30bb7761 ro rootflags=subvol=@
nvme_core.force_apst=1
Been through several cycles of suspend and resume, without any apparent
issues.
But I note:
$ sudo nvme id-ctrl /dev/nvme0n1
....
ps 0 : mp:6.04W operational enlat:0 exlat:0 rrt:0 rrl:0
rwt:0 rwl:0 idle_power:- active_power:-
ps 1 : mp:5.09W operational enlat:0 exlat:0 rrt:1 rrl:1
rwt:1 rwl:1 idle_power:- active_power:-
ps 2 : mp:4.08W operational enlat:0 exlat:0 rrt:2 rrl:2
rwt:2 rwl:2 idle_power:- active_power:-
ps 3 : mp:0.0400W non-operational enlat:210 exlat:1500 rrt:3 rrl:3
rwt:3 rwl:3 idle_power:- active_power:-
ps 4 : mp:0.0050W non-operational enlat:2200 exlat:6000 rrt:4 rrl:4
rwt:4 rwl:4 idle_power:- active_power:-
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https://bugs.launchpad.net/bugs/1705748
Title:
Samsung SSD 960 EVO 500GB refused to change power state
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