S3 sleep with ubuntu-server

[Sasha Levin]

Hi,

I'm testing S3 sleep on a server installed with ubuntu-server.

Sending it to sleep and waking it up once using wake-on-lan once works well.
Further attempts to send it to sleep make it resume from sleep almost
instantaneously without any obvious reason.

I've tried running the same test using ubuntu-desktop, but that worked
perfectly. The server stayed in S3 even after several wake-on-lan cycles.
/var/log/syslog and /var/log/messages don't show a clear reason why the
desktop works and the server doesn't

How can I debug the problem? Or is it something thats currently missing from
the kernel configuration for servers?



Thanks,
Sasha
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