Impacts of disabling Automatic Power Management
pgf at laptop.org
Wed Feb 1 11:18:03 EST 2012
> On 1 February 2012 15:43, Paul Fox <pgf at laptop.org> wrote:
> > sridhar wrote:
> > > We are considering disabling Automatic Power Management because of its
> > > impact on collaboration and 3G connectivity.
> > >
> > > What kind of battery life can we expect from an XO-1.5 with Automatic
> > > Power Management disabled as opposed to enabled? I understand that
> > > this can vary wildly with usage, but is there an average estimate?
> > he's on a very long plane flight, but i'll try and channel richard:
> > "it depends."
> > how did i do? :-)
> I was trying to head that off with my "I understand that..." statement :)
> > you're probably in as good a position to answer this as we are, since
> > you have a better idea of your system activity load. with automatic
> > power management turned off, a 1.5 is good for several hours of use,
> > where "several" is intentionally vague. backlight on full? wireless
> > on? continuous cpu activity? etc.
> > would it help to disable automatic power management only when specific
> > Activities are running? only when certain kinds of collaboration are
> > in effect? only when certain drivers are active?
> We've been thinking of doing this for when 3G connections are active
> . It might be interesting to also tie this into Sugar's
> collaboration mechanism and disable power management when a session is
in http://dev.laptop.org/ticket/10708 i suggested adding the 3G modem's
USB vendor/product ID to /etc/powerd/flags/usb-inhibits. this would
stop automatic power management while the device is present. would that
>  https://dev.laptop.org.au/issues/1029
> Sridhar Dhanapalan
> Engineering Manager
> One Laptop per Child Australia
paul fox, pgf at laptop.org
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