Suspend drains battery on IBM T42

[Alexandre "Sunny" Kovalenko]

On Thu, 2005-10-13 at 01:02 +0000, Eric Kjeldergaard wrote:
> On 12/10/05, Barkley Vowk <bvowk at math.ualberta.ca> wrote:
> > I just got a new T42 notebook, and everything works ok, except when I drop
> > the notebook into acpi sleep, it burns through the battery in 8 hours or
> > so. It would be nice if the notebook could suspend at least overnight.
> >
> > I've also noticed that the suspended notebook is warm to the touch. And,
> > that when the notebook is suspended, the LCD backlight goes off, but the
> > text is still faintly visible.
> >
> > This site leads me to believe that my radeon chipset isn't being put to
> > bed:
> > http://www.thinkwiki.org/wiki/Problem_with_high_power_drain_in_ACPI_sleep
> >
> > I'm running 6.0-B5, and I've got acpi_ibm, acpi_video loaded (I kind of
> > wish suspend/resume would work with drm enabled).
> >
> > I had tried using apm instead of acpi, but usb fails to work after
> > resuming, so I didn't test to see if the power drain was better.
> 
> you may want to check out radeontool
> http://www.init-main.com/radeontoolport.tar.gz .  Another common user
> of power in suspended laptops seems to be USB not shutting down.  Good
> luck with your troubles,
> 
> Eric
> 
> --
> If I write a signature, my emails will appear more personalised.
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Good way to check whether USB is the culprit is to use something like
USB-powered reading light and suspend. On mine (Averatec 3150H) it stays
on, even when machine seem to go to sleep. I don't have solution for
this though...

-- 
Alexandre "Sunny" Kovalenko (Олександр Коваленко)