[mythtv-users] ACPI sleep problems

[Steve Hill]

On Mon, 19 Sep 2005, Greg Woods wrote:

> Where did you read this? I'd like to know because everything *I* have
> read says that ACPI suspend-to-RAM doesn't really work on Linux. I have
> never been able to make it work on my laptop; I can get it to suspend to
> RAM by doing "echo 3 > /proc/acpi/sleep", but there appears to be no way

http://acpi.sourceforge.net/documentation/sleep.html

>From what I understand, suspend to RAM should work but suspend to disk 
needs some extra kernel patches.  /proc/acpi/sleep seems to be the old 
2.4 kernel interface, whereas /sys/power/state is the 2.6 kernel 
interface.  Whilest suspending using ACPI seems to just power my machine 
off completely, if I disable ACPI and use APM instead it sends the machine 
to sleep but won't wake up again.

> in Linux is not very robust as yet. Whether or not it will work will
> likely depend on exactly what kernel version you are running and what
> motherboard and BIOS chip. But it is highly unlikely that it will be as
> simple as echoing something to a /proc or /sys file. If you do manage to
> make it work, I'd love to hear about it.

I'm running Fedora Core 3 on that box (can't remember the exact kernel 
version and I don't have access to the machine ATM).  I have made machines 
go to sleep by echoing into the /proc/acpi/sleep file before and the docs 
say it _should_ work...

-- 

  - Steve
    xmpp:steve at nexusuk.org   sip:steve at nexusuk.org   http://www.nexusuk.org/

      Servatis a periculum, servatis a maleficum - Whisper, Evanescence