RE: [ACPI] "TSC cannot be used as a timesource" when on battery

[Ow M. H. <ow....@wd...>]

> -----Original Message-----
> From: Ow Mun Heng=20
> Sent: Monday, March 01, 2004 10:39 AM
> To: Acpi-List (E-mail)
> Subject: [ACPI] "TSC cannot be used as a timesource" when on battery
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> Hi All,
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> D600 + RH9 + kernel 2.6.3+acpi20040211
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> Was seeing these error messages when booting from battery.=20
> I've searched through google and the only thing It came up with=20
> was a reference that asks to use ACPI PM as the timesource.
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> I'm currently using RTC (real time clock)
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> I'm still trying to figure out what is the difference between ACPI=20
> PM timesource/RTC.
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> I've not investigated further to determine if my clock is indeed=20
> running slower.=20
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> =3D=3D=3D=3Dstart kernel message=3D=3D=3D=3D=3D=3D=3D
> TSC cannot be used as a timesource.
>  <4> Possible reasons for this are
> You're running with speedstep
> You don't have DMA enabled for your hard drive (See hdparm)
> Incorrect TSC synchronization on an SMP system (dee dmesg)
> Falling back to sane timesource now.
> =3D=3D=3D=3D=3D=3D=3Dend kernel messages=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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> HDparm shows all my hd and cdrom are on dma
> This is uniprocessor laptop
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> Yes.. running on speedstep.
> When on AC power, I don't see this error.

Sent this to the list a while back.. I've not
seen any responses. So, asking again, just in case it
was missed (busy schedules etc)

I don't really think it's an issue.. but still would like=20
to know what is triggering it.

Thanks,
Ow

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