Suspend drains battery on IBM T42

Eric Kjeldergaard kjelderg at
Wed Oct 12 18:02:22 PDT 2005

On 12/10/05, Barkley Vowk <bvowk at> 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:
> 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 .  Another common user
of power in suspended laptops seems to be USB not shutting down.  Good
luck with your troubles,


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