From: Pavel Machek <pavel@ucw.cz>
To: "Michael (Micksa) Slade" <micksa@knobbits.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Inspiron 6000 and CPU power saving
Date: Wed, 25 Oct 2006 11:47:57 +0200 [thread overview]
Message-ID: <20061025094757.GA7658@elf.ucw.cz> (raw)
In-Reply-To: <4532EBE2.6090709@knobbits.org>
Hi!
> I recently discovered that my Inspiron 6000 uses about 50% more power
> idling in linux than in windows XP. This means its battery life is
> about 2/3 of what it could/should be.
>
> I guessed it might be the CPU, and did some tests. The results strongly
> suggest as much. These are the results I got for power consumption in
> various situations.
>
> linux idle at 800MHz: 27W
> linux idle at 1600MHz: 36W
> linux raytracing at 800: 30W
> linux raytracing at 1600: 42W
>
> windows idle (presumably 800MHz): 16W
> windows raytracing (presumably 1600MHz): 36W
>
> I've tried ubuntu dapper and ubuntu edgy, and RIP 10 (rescue disk) and
> BBC 2.1 (rescue disk), and they all appear to have the same issue. The
> machine's BIOS has no APM so I can't try it for comparison.
Let me guess, UHCI? Remove usb modules, and measure again.
For details, see 8hours on your lap presentation, linked from
http://www.livejournal.com/~pavelmachek .
Pavel
next prev parent reply other threads:[~2006-10-25 9:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-16 2:18 Inspiron 6000 and CPU power saving Michael (Micksa) Slade
2006-10-17 8:07 ` Oleg Verych
2006-10-25 9:47 ` Pavel Machek [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-10-19 17:26 Pallipadi, Venkatesh
2006-10-21 11:45 ` Michael (Micksa) Slade
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