Comment 19 for bug 1910927

You can check whether s2idle or suspend (s3) is used by kernel 5.4 & kernel 4.15 by

$ cat /sys/power/mem_sleep
s2idle [deep]

where deep is s3

Switching one to another can be done by "echo deep | sudo tee /sys/power/mem_sleep" or "echo s2idle ...").

If switching to "deep" fixes your problem, you can make it permanent by adding "mem_sleep_default=deep" to your kernel parameters.