so said EVELYN the modified DOG

(This is not just a Zappa quote, but an actual error description from the Small Device C Compiler.)

Check with powertop that runtime power manage is enabled for devices (tunables are “Good”).

It looks like it has a RTL8111H for Ethernet, which is known to be problematic with sleep. My machines don’t go below C3 due runtime power management being disabled for Ethernet, but enabling it causes it to fail to come out of suspend correctly.