Natty -lowlatency kernel

David Henningsson david.henningsson at
Wed Oct 27 14:52:35 BST 2010

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

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