Re: Hibernate from TDE

Michele Calgaro via tde-users <users@xxxxxxxxxxxxxxxxxx> · Sat, 3 Jul 2021 18:42:30 +0900

On 2021/07/03 3:50:43 PM, Gianluca Interlandi wrote:
On Fri, 2 Jul 2021, Gianluca Interlandi wrote:

On Sat, 3 Jul 2021, Michele Calgaro via tde-users wrote:

Ciao Gianluca,
if you are using R14.1.0-dev, there are up to 4 possible buttons, depending on what is supported by your system.

- freeze
- suspend ==> suspend to RAM
- hibernate ==> suspend to disk
- hybryd suspend ==> suspend to RAM+disk

Ciao Michele,

I'm using R14.0.10 and it's interesting I do see the hibernate option now. I tried it out and it works. I do not see 
"hybryd suspend".

Do you please mind explaining the difference between "freeze" and "suspend to RAM"? I understand this question is a 
bit outside a DE development.

I did find some documentation about the different sleep states:

https://www.kernel.org/doc/Documentation/power/states.txt

It says: "This state [freeze] is a generic, pure software, light-weight, system sleep state. [...] This state [freeze] 
can be used for platforms without Power-On Suspend/Suspend-to-RAM support, [...] It is always supported."

This means, I do not really need to worry whether my system really supports it or not since it's just software based? So 
there should be little risk that it makes the system hang?

Ciao Gianluca,
yes, that kernel doc page is a good reference, I would have pointed you there anyway.

Hybryd suspend is available in R14.1.0-dev and if I remember correctly it is not available in the R14.0.x series. Also, 
hardware support is required for that.
Re freeze: is a lighter form compare to suspend-to-RAM and meant to be quicker to go back to a working state. I have 
seen system hanging with freeze, though. So give it a go, see how it goes and use it/avoid it depending on the outcoume 
of the test.

Re the logo after coming up from hibernate, it is likely to be related to the kernel/kernel config you are using since 
the OS is not operating till the resume from hibernate is completed.

Cheers
  Michele

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