On 8/3/05, Hans Kristian Rosbach <[EMAIL PROTECTED]> wrote: > On Tue, 2005-08-02 at 00:50 -0400, James Bruce wrote: > > Theodore Ts'o wrote: > > > On Mon, Aug 01, 2005 at 12:18:18PM -0400, James Bruce wrote: > > >>The tradeoff is a realistic 4.4% power savings vs a 300% increase in > > >>the minimum sleep period. A user will see zero power savings if they > > >>have a USB mouse (probably 99% of desktops). On top of that, we can > > ^^^^^^^^ > > > > > Most laptops (including mine, a Thinkpad T40) use a PS/2 mouse. So in > > > the places where power consumption savins matters most, it's usually > > > quite possible to function without needing any USB devices. The 90% > > > figure isn't at all right; in fact, it may be that over 90% of the > > > laptops still use PS/2 mice and keyboards. > > > > Yes, laptops are mostly PS/2, which is why I only claimed a statistic > > for desktops. Desktops pretty much all use USB mice now. If 250Hz were > > only being sold as an option for laptops, we could leave it at that, yet > > its being pushed as a default that's "good for everyone". For desktops > > this is not currently true at all. By the time USB is fixed to do power > > saving, we'll probably have a working tick-skipping patch which makes > > the whole HZ argument moot. > > Most new laptops are moving away from PS/2 ports, for example my > shining (literally) new Acer Ferrari 4005 only has USB2 ports for mice > and keyboard inputs (unless in the optional pcie docking station maybe). > So my suggestion would be to fix USB power management. >
You are talking about external ports. I am pretty sure that installed keyboard and touchpad (or whattever pointing device it has) are plain old PS/2. -- Dmitry - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
