> Can you now show memory status after suspend happened and failed ?
> Can you also try repeat the test with minimal graphics enabled(switch to FB
> console, sudo xinit) and then repeat the steps to see if this still happens

(In reply to mikhail.v.gavrilov from comment #6)
> Created attachment 141331 [details]
> memory status before

# systemctl suspend

(In reply to mikhail.v.gavrilov from comment #7)
> Created attachment 141332 [details]
> memory status after

I make this in FB console but result are same:

(In reply to mikhail.v.gavrilov from comment #8)
> Created attachment 141333 [details]
> system log