I don't have much to add but I have the same problem with my TP T42.
If I boot without ac and check the the cpuinfo it will say it is
running at full speed (1.8 Ghz).  It feels like 600 Mhz or slower from
some compile tests I have done.

If anyone has a suggestion I would love to hear it.

Andrew

On 8/11/06, Will Briggs <[EMAIL PROTECTED]> wrote:
G'day all,

Having an interesting phenomenon when I boot my Dell Inspiron 6400 to
linux without AC plugged in.  The boot process is as slow as a dog, all
the fans are maxed "on", and cpufrequency shifting gets stuck at 1 GHz
like the governor is not working (and the slowness is more than what the
cpu frequency shifting would cause).

However if I boot with AC and then unplug it everything works well under
battery - cpu steps up and down with demand, fans behave properly etc.

I wondered at first if the BIOS switches stuff off under battery so that
various modules don't load or something but there's nothing obvious in
dmesg and lsmod looks fine - and I've check out BIOS settings to see if
there's anything - and there isn't.

Any clue where to begin diagnosing such an issue?

W.
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