[ltp] Re: Z61p vs T61p

[Marius Gedminas]

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On Fri, Dec 28, 2007 at 10:58:51AM -0800, Marc MERLIN wrote:
> On Fri, Dec 28, 2007 at 10:45:16AM -0800, Marc MERLIN wrote:
> > Thinkpad Z61p 1920x1200, fglrx, 2.6.22.15 (required by 8.38.6)
> > ATI FireGL 5200 (which requires fglrx, and not newer than 8.38.6)
> > Dual Core Duo T7200 @ 2.00GHz, and 2GB of Ram
=2E..
> Either way, I'm happy to compare/swap notes with T60/61(p) users too,
> except for the nvidia part of course, which I can't help with.

My T61 (1280x800 intel GM965), stock Ubuntu Gutsy, Core 2 Duo @ 1.8 GHz,
1 GB of RAM: with powertop and xbacklight I can get the power usage down
to about 14-15W (wifi on).  That's about 3.5--4 hours of battery life.

By trying harder (replacing compiz with metacity; killing powernowd and
replacing it with the 'ondemand' CPU governor) and doing unreasonable
stuff (like turning down the LCD backlight to an unreadable 10%) I once
managed to get the power usage to almost 10W.  Well, all right, 10.8W.

I recently upgraded to 2 gigs of RAM, it would be interesting to see if
the power usage increased noticeably.  Let's see...

=2E.. 13.7W at 50% xbacklight when idle (~13.9W while typing).  This
includes an mplayer movie paused in the background, which contributes
~70 wakeups per second.  FWIW compiz wakes up at ~20 Hz, Xorg at another
20 Hz, one of the interrupts that serves wifi, USB and audio wakes up at
280 Hz, another one -- USB, cardbus and video -- at 80 Hz; in total I
see about 500 wakeups per second).

Marius Gedminas
--=20
Anything can be made to work if you fiddle with it long enough.

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