For INFO only.
Last update to kernel linux-next 5.4.1-1 broke suspend on my older PC.
Adding init_on_alloc=0 to the grub command line seems to have solved it.
Info from "https://bbs.archlinux.org/viewtopic.php?id=250863"
See this commit why it was added (new security recommendation):
OK Demm. Thanks. No problem on main PC only the old one.