[ltp] What's cutting my CPU speed in half? / (FC6 upgrade bug)

[Luca De Cicco]

Hi there to the list.
I have the same issue, this is caused by a bug in acpi that has been
introduced in 2.6.18 kernels. The problem is that when you boot without
AC plugged you can't set the CPU speed to the max because you
miss /sys/devices/system/cpu/cpu0/cpufreq/.

Hope the issue will be fixed soon.

Regards,
Luca De Cicco

On Thu, 16 Nov 2006 12:04:59 -0700 (MST)
Mendel Cooper <thegrendel@theriver.com> wrote:

> On Thu, 16 Nov 2006, Daniel Maier wrote:
> 
> > >   Some thinkpads, when booted w/o AC power plugged in, boot at a
> > > reduced speed.
> > >
> > >   You can't switch it back up to full speed w/o the cpufreq
> > > drivers & apps - unless you want to reboot with AC plugged in.
> > This is a BIOS setting which can be set to customized for both,
> > battery and AC.
> >
> > Have a look at:
> > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor and
> > scaling_max_freq.
>