Code:
# dmesg | grep "(supports"
should return something like:
Code:
[ 0.368181] ACPI: PM: (supports S0 S3 S4 S5)
If you don't have
S4, then
[deep] sleep is not supported
It was the same here, but I use this link to override ACPI:
https://forums.linuxmint.com/viewtop...cd655#p2077184
And I use this option
Code:
-P /boot/acpi_override
during mkinitrd process
But, I'm pretty sure this have nothing to do with your resume issue, because my system is able to wake up from hibernation even with
s2idle mode