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Is suspend to disk or hibernate possible? #198

Open bung69 opened 2 years ago

bung69 commented 2 years ago

Hi,

i have tied to get suspend to disk / hibernate working with GVT-D and just noticed the QEMU parameters disabling suspend and hibernate in your guide.

 -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1

is there anyway to successfully use suspend to disk? currently my VM just hangs on suspend.

i also notice in issue https://github.com/intel/gvt-linux/issues/175 that migration is possible. surely if migration is possible suspend to disk is also possible?

Thanks

TerrenceXu commented 2 years ago

Yes, suspend to disk feature is not enabled until now. And migration code is not upstream until now.

bung69 commented 2 years ago

After a bit more experimenting i found that an Ubuntu 20.04 or 21.10 VM with suspend to disk configured and GVT-D graphics passed through will suspend to disk and resume without issue.

Fedora 35 on the other hand will not, hanging during suspend and then failing to boot after. I guess Ubuntu and Fedora must use different methods to handle suspend to disk?