[ltp] thinkpad t61 on Ubuntu 9.04

[Marius Gedminas]

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(reformatted to put the question before the answers)

On Thu, Dec 17, 2009 at 11:26:02AM -0500, Shannon McMackin wrote:
> On Thu, Dec 17, 2009 at 10:55 AM, anonymous sheep <anonymous.sheep@gmail.=
com
> > I decided not to try 9.10 due to the array of problems, especially with
> > thinkpads t61.
> > My processor is: model name    : Intel(R) Core(TM)2 Duo CPU     T7300  @
> > 2.00GHz
> >
> > cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
> > Doesn't work on my sytem.

"Doesn't work" is not specific enough.  I assume it errors out with "no
such file or directory"?

> > After further investigation I realized I don't
> > even have the cpufreq directory.

Heh, I don't have to assume.

> > I don't think cpufreq is supported with my
> > model.  I remember checking with a command and it said cpu not supporte=
d.
>
> I ran 9.10 without issue on my T61 with the same CPU.  9.04 also had cpuf=
req
> on my system.

So, let's find out what's different.

> > I probably am using ondemand governor... though there is no way for me =
to
> > tell

No, you were right -- you're not, or the /sys/devices/... node would
exist.

You can also double-check by running powertop.

> On 9.04, search with synaptic for cpufreq.  It may not have been a default
> applet on that version.

No, that won't help -- it's a kernel issue.

I've already upgraded to Ubuntu 9.10 (which works just fine on my T61,
thank you, Intel!), so I cannot check if it was the same in 9.04, but
according to

  $ less /boot/config-`uname -r`

cpufreq is built into the kernel.  Specifically, I *think* this one is
being used:

  CONFIG_X86_ACPI_CPUFREQ=3Dy

which raises a question for the OP: is ACPI enabled and working?  E.g.
on my T61

  $ grep ACPI.*CPU /var/log/dmesg
  [    0.562510] ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
  [    0.562542] ACPI: Processor [CPU0] (supports 8 throttling states)
  [    0.565612] ACPI: CPU1 (power states: C1[C1] C2[C2] C3[C3])
  [    0.565639] ACPI: Processor [CPU1] (supports 8 throttling states)

> > My gpu is Nvidia Quattro NVS 140m

And the video driver?  Specifically, did you enable the restricted
driver, or are you using the open-source one?

> > The temperature is tolerable now probably because its the winter.

Marius Gedminas
--=20
Unix is the answer, but only if you phrase the question very carefully.
                -- Belinda Asbell

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