ACPI support and Standby (S3 Sleep)

Forum thread started by Megaf on Mon, 2010-06-14 02:41

Hi folks,
First of all, congratulations for this amazing work you developers are doing on Haiku, i'ts getting really good!

Now, I would like to know about the ACPI support on Haiku, because i can't put my computer on Standby mode (S3 Sleep or Suspend to RAM) and I could not find anything about it on Haiku menu or preferences either.

So, I ask you, is there any support for any ACPI power saving mode? Are you planning to implement that?

State 	Description
S0/Working 	System is on. The CPU is fully up and running; power conservation operates on a per-device basis.
S1 Sleep 	System appears off. The CPU is stopped; RAM is refreshed; the system runs in a low power mode.
S2 Sleep 	System appears off. The CPU has no power; RAM is refreshed; the system uses a lower power mode than S1.
S3 Sleep (Standby) 	System appears off. The CPU has no power; RAM is in slow refresh; the power supply is in a reduced power mode. This mode is commonly referred to as 'Suspend To RAM'.
S4 Hibernate 	System appears off. The hardware is completely off, but system memory has been saved as a temporary file onto the harddisk. This mode is also referred to as 'Suspend To Disk'.
S5/Off 	System is off. The hardware is completely off, the operating system has shut down; nothing has been saved. Requires a complete reboot to return to the Working state.
Source 	http://www.lifsoft.com/power/faq.htm

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Comments

Re: ACPI support and Standby (S3 Sleep)

by phoudoin - 2010-06-14 08:41

> is there any support for any ACPI power saving mode?

There is basic support for speedstep, and a preflet to show the current stepping mode.
But it's uncomplete both on supported CPUs and power saving modes.

> Are you planning to implement that?

Sure, we will. But as pretty much all features already planned, the timing is very uncertain.

Re: ACPI support and Standby (S3 Sleep)

by tqh - 2010-06-14 11:58

There are more important issues regarding acpi than sleepstates atm, so it will probably be supported eventually but when is hard to say.

Help is always welcome :)

Re: ACPI support and Standby (S3 Sleep)

by Megaf - 2010-06-14 14:14

Ok, thanks a lot!