Mickael Marchand wrote:

> Hello,
>
> I am having the same kind of troubles (can't tune and mt_set_frequency 
> -121 errors) since 2.6.10 (it was working in 2.6.9) on amd64.
> this patch did not help sadely.

I have the same problem, but on x86, the attached patch fixed it for me.

-- 
Guillaume