Re: Linux 2.6.30-rc8 [also: VIA Support]

Harald Welte
2009-06-05T07:20:17Z

On Thu, Jun 04, 2009 at 10:07:37AM -0700, Linus Torvalds wrote:
>
>
> Side note: is it more stable if you disable the VIA speedstep thing
> (whatever it's called (ok, google tells me it's called "TwinTurbo" and
> "Advanced PowerSaver")?
>
> Features like that easily put a huge stress on power regulators etc, if
> they result in sudden changes in current draw. Underspecced capacitors
> etc can cause CPU "brown-outs", which in turn can easily cause total
> failure.

I agree, that might be an interesting test.

As a side note: The C7-M actually uses the same software interface as Intel CPU
for doing the power transitions (ACPI Performance States). Only very early C7
models used the cpufreq/e_powersaver.c driver.

So if you want to disable it, make sure you disable X86_ACPI_CPUFREQ.

--
- Harald Welte <HaraldWelte@viatech.com> http://linux.via.com.tw/
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VIA Free and Open Source Software Liaison