Re: bt878 'interference' on fc6 but not fc1

[Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>]

On Mon, 4 Feb 2008 22:08:24 +0000
"Andy McMullan" <andy@xxxxxxxxxxx> wrote:

> > Maybe it have something to do with some power saving cycle at the processor.
> > You may try to change powersave governor policy and see the results.
> 
> Thanks for the suggestion.  I tried turning off the cpuspeed service,
> and even totally disabling acpi in the kernel, but it didn't make any
> difference.  (I don't know much about cpu throttling on linux, but I
> assume it relies on ACPI)

Just stopping a daemon wouldn't solve. 
You may try to do something like this:

echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor  

test, and test again with:

echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor  

This link provides some additional info:
http://www.thinkwiki.org/wiki/How_to_make_use_of_Dynamic_Frequency_Scaling

There's an interesting tool that will help to see what is happening at
processor level. It is powertop:
http://www.lesswatts.org/projects/powertop/

The tool may help you to see the differences between the previous and the newer
setup.

Cheers,
Mauro

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