Kubuntu 10.10 and real-time kernel

[Hartmut Noack]

Am 26.02.2011 21:52, schrieb Scott Lavender:
> On Sat, Feb 26, 2011 at 2:16 PM, Alexandros Bitoulas<albitoulas at yahoo.gr>wrote:
>
>> Hello everybody!
>>
>>
> Hi Alexandros!
>
>
>> I run kubuntu 10.10 with 2.6.35-25-generic kernel and I am very pleased and
>> enthusiast about it's aesthetic feel.
>>
>> However, I want to record live my guitar. With this kernel, the latency
>> that I
>> get in Jack, (with 512 frames/period, 44100 Sample Rate and 2
>> Periods/Buffer)
>> is 23.2 msec which is a little bit annoying. If I lower the Frames to 256 I
>> get 11.6 but I have many Xruns.
>>
>>
> it would be helpful to know what you audio interface is to perhaps help you
> get better performance.
>
> Also, in some cases (and yours might be one) if you add the user to the
> 'audio' group it helps performance as well.
>
>
>> So, I am thinking to install the realtime kernel. The question is: are
>> Kubuntu
>> 10.10 and real-time kernel full compatible with each other? Do I need to
>> make
>> any considerations/modifications in my system before installing the
>> real-time
>> kernel. Did anyone had any problems with Kubuntu 10.10 and real-time
>> kernel?
>>
>>
> Good question.  But since it's all based on Ubuntu I wouldn't expect much
> deviation in performance except in specific, restricted cases.
>
>
>> I searched on the web and I only found some generic comments like "that KDE
>> isn't suitable for audio production", but with no serious support that
>> validate those comments.
>>
>>
> I think many people would argue with that position.

KDE is not as "light" in terms of memory/CPU-usage as Fluxbox but if one 
disabeles the desktop-search-system, KDE will have little impact on the 
audio-performance.
Kernel and System-Setup are really important. If a capable basic-system 
is set up carefully, the desktop-system does not matter much. Running 
KDE instead of Fluxbox will not have much more impact than another Synth 
started in a session.

I use to run KDE4.3 under Suse 11.2 with jengelh-RT-kernel on my 
quad-core workstation and tested the same system with Fluxbox and LXDE 
also. I did not see any improvement of performance so I stuck with KDE 
for convenience ;-)

best regs

HZN

>
> A good friend created and maintains that KXStudio distro which is based on
> Ubuntu Studio and uses KDE.  It's brilliant and beautiful and includes a
> -realtime kernel I believe.  It's a live DVD so I would highly recommend
> researching it.  You can find it here:
> http://kxstudio.sourceforge.net/
>
>
>> I am looking forward to your replies and comments!
>>
>> Thank you in advance,
>>
>> Alex
>>
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>
>
> ScottL
>
>