Natty -lowlatency kernel

Ronan Jouchet ronan at
Wed Oct 27 15:14:25 BST 2010

On Wed, Oct 27, 2010 at 9:52 AM, David Henningsson
<david.henningsson at> wrote:
> On 2010-10-27 04:02, Alessio Igor Bogani wrote:
>> Hi,
>> I would want let you notice that I made a preliminary (and untested)
>> version of the Natty -lowlatency kernel for testing.
>> It is available through my PPA
>> (
>> I suggest to use a VM for first tests at least.
>> Any feedback is welcome!
> Cool, and good timing, since there is a UDS session tomorrow when this
> flavour is going to be discussed. Here's some feedback. I'm at UDS but I
> was bold enough to install it directly on Maverick, on my laptop with an
> HDA card.
> I tried to do some testing and so far I haven't seen any difference. I
> haven't experienced any instability or something like that, but I
> haven't experienced any improvments either. I tried jack with 256x2
> buffers and got underruns with both the standard Maverick kernel and the
> 2.6.36-1-lowlatency kernel. 2x1024 gave no underruns on the generic one,
> never tested that setting on the lowlatency version.
> Perhaps I've done something wrong. I should really do more testing, see
> if there is any buffer size where there is a difference, and try to get
> to the bottom of that to see what's actually causing the underruns.
> (Which means I have to learn how to do that...)
> // David

I will try it this weekend with my FA66 firewire card on various
settings & workloads, and report back here.
Great job Alessio, good to see -lowlatency moving forward for Natty!


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