Question

ACPI wakeup under Linux?

Asked by: j2

Gigabyte GA-73PVM-S2H
Award, F8, 02/13/2009
Intel C2D E6300
2GB RAM

Ubuntu 9.10 Karmic Koala
2.6.31-generic #45-Ubuntu SMP Tue Oct 13 02:08:03 UTC 2009 i686 GNU/Linux

HPET disabled in BIOS and with the addidtion hpet=disable in GRUB_CMDLINE_LINUX_DEFAULT

Problem is simple: I cannot make the system wake up after i set a time in /sys/class/rtc/rtc0/wakealarm Since the box is a MythTV-plattform, this more then a little annoying.

I ahve tried every conceivable combination of BIOS-options and /proc/acpi/wakeup

What is the magic combination i need to make this work?

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Asked On
2009-10-14 at 11:14:08ID24812262
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Ubuntu 9.10 Karmic Koala ACPI Wakeup

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Ubuntu

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Computer Motherboards

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Answers

 

by: diepesPosted on 2009-10-15 at 00:50:12ID: 25578197

did you find options in the bios related to waking up the system on different interrupt events ?

 

by: fmarzoccaPosted on 2009-10-15 at 00:52:06ID: 25578211

I suppose you have given a chance to this page: http://www.mythtv.org/wiki/ACPI_Wakeup

Have you correctly disabled HWclock updates?

 

by: j2Posted on 2009-10-15 at 00:55:48ID: 25578234

diepes: BIOS lacks those settings. It even lacks a WOL-setting, but activating WOL with rthtool works just fine. BIOS only has a wake on alarm, which works if set from BIOS. BIOS has a WakeOnRing setting, which i have tried both as enabled and disabled.

fmarzocca: I have tried both with and without hwclockupdate, and yes, I have used that page.

 

by: j2Posted on 2009-10-15 at 00:57:14ID: 25578241

ANd, yes, I have thought about using nvram-wakeup instead, but that interface is not available in later kernel revisions.

 

by: j2Posted on 2009-10-15 at 01:00:14ID: 25578268

And also, please note that my board is mentioned as a "success story" on http://www.mythtv.org/wiki/ACPI_Wakeup but with an older Ubuntu/Kernel combination.

 

by: j2Posted on 2009-10-15 at 06:28:27ID: 25580266

And, I have now also tried the "relative"-method described in http://bugzilla.kernel.org/show_bug.cgi?id=12013 (in otherwords echo +600 ....) no change in behaviour.

 

by: j2Posted on 2009-10-15 at 15:28:59ID: 25585539

AHA!

The magic combination seem to be:

Disable HPET in BIOS
NOT disable HPET in kernel
Disable all Wake-events in BIOS

Use the "relative" form of input (as in echo +300 > /sys/class/rtc/rtc0/wakealarm )

I no longer need an answer to this question.

20120131-EE-VQP-002

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