[arch-general] Hibernation not working

Hello, since some time, hibernation does not work, dmesg contains following messages: [ 738.404244] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95) [ 738.404353] ACPI: \_SB_.PCI0.PEG0.PEGP: failed to evaluate _DSM [ 738.404356] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95) Some time ago, when I closed my laptop, Linux automatically hibernated, now it does not. As my laptop becomes really warm and I don't want to stress my display, I'm using this rarely, so I cannot tell, since when hibernation doesn't work :-/ Kind regartds Peter