Re: [linux-pm] Runtime PM discussion notes

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Saturday, July 30, 2011, Pavel Machek wrote:
> Hi!
> 
> > > Well, auto suspending when screensaver is active would still be
> > > useful.
> > > 
> > > (And IIRC some machines kept screen on when in S-state unless driver
> > > powered it down... but that might be S1.
> > > 
> > > > The reason why you can't enter ACPI S-states from CPUidle is because you
> > > > need to go out of the idle loop to execute some ACPI-specific stuff.  Which
> > > > is not even specific to Intel chips, but to ACPI in general.
> > > 
> > > The code was little tricky/unclean, but it "worked" for me at one
> > > point... I called it  "sleepy linux".
> > 
> > Yes, you can find a system where it might kind of work (just because
> > _PTS is empty or something like this).  Is it going to work in general?
> > No way.
> 
> IIRC I solved it by just calling _PTS when sleepy Linux was
> enabled. It had side effect of lighting up moon icon, but otherwise
> seemed to work ok.
> 
> I do not think ACPI says what can and can not be done after _PTS...

Yes, it does.

Thanks,
Rafael
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux