Re: [announce] Intel announces the PowerTOP utility for Linux

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

 



On May 12 2007 22:12, Alistair John Strachan wrote:
>On Saturday 12 May 2007 00:07:18 Arjan van de Ven wrote:
>> What's eating the battery life of my laptop? Why isn't it many more
>> hours? Which software component causes the most power to be burned?
>> These are important questions without a good answer... until now.
>
>This is a really great tool and presents a very intuitive alternative to the 
>timer stats file..
>
>On a Core 2 Duo Macbook, Linux always gets around 3.2h battery, OS X about 
>4.2h. This tool has identified that uhci_hcd is where 75% of the ticks are 
>going when X is not loaded. Unloading uhci_hcd drops the battery life back to 
>around 4.2h, but I lose the keyboard.
>
>Is there any way to find out what USB driver is causing usb_uhci to be this 
>busy?

At its worst, it _is_ the USB chip that draws the power when it is active
(when uhci_hcd is loaded); does not need to be usbhid or so.


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

[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux