[PlanetCCRMA] fc13: alsa-tools, jconvolver

[Bernardo Barros]

Maybe the problem I am having with the rt-kernel is because of the
nouveau driver? I tried to find the nvidia driver just to test, but I
was afraid because I did not find my exact card model on the website
(Quadro FX 880M).

I have a very very similar model (Thinkpad w510), but I think they
have different graphics cards.

Is that safe to install the akmod-nvidia pakage to try it out?



2010/9/18 Fernando Lopez-Lezcano <nando at ccrma.stanford.edu>:
> On Sat, 2010-09-18 at 16:53 -0700, Jeff Sandys wrote:
>> >> Date: Thu, 16 Sep 2010 11:22:27 -0700
>> >> From: Fernando Lopez-Lezcano <nando at ccrma.Stanford.EDU>
>> >> Subject: [PlanetCCRMA] fc13: alsa-tools, jconvolver
>> >>
>> >> Also... I released a version of akmod-nvidia (arghhh) in the
>> >> planetcore-testing repository that appears to compile the glue module
>> >> cleanly on rt kernels. Only tested _once_ in a new laptop[*], appears to
>> >> work but as you already know no support is possible at all for binary
>> >> drivers. I do see an rt related warning because of the nvidia driver but
>> >> video appears to work anyway (don't know for how long :-).
>> >>
>> >> [*] while nouveau works fine and gives a nice graphical startup and a
>> >> nice display after boot, the latencies it induces are really really bad.
>> >> Hopefully it will evolve into better latencies...
>>
>> How can you tell (scientifically) what nouveau's impact is on latency?
>
> Nothing scientific about it. I installed fc13 on a new t510 lenovo with
> discrete graphics (and I got that one because if you configure with the
> Intel integrated graphics which I would have preferred then you can't
> get the best resolution display, arghh) - coult not install fc12 as it
> would not do the right thing and the display was blank.
>
> Anyway, jack was very unreliable with the integrated audio and once I
> connected the RME Multiface I saw the exact same behavior. Lots of xruns
> just moving the cursor from window to window. Then I remembered reading
> about latency vs. nouveau and I installed the nvidia driver much to my
> distaste (nouveau seemed to be working just fine other than that). The
> xruns just went away and that was the only change so I presume the
> problem was nouveau.
>
>> I'm running 16ms (3x256 at 48000) latency on my new laptop using
>> nouveau with fedora 13.  This is about the same as on my old laptop
>> using f12 and the nvidia akmod from rpmfusion.
>
> Glad to hear that it is working on some other hardware. There is hope...
> I run 2x128 with the RME for my realtime pieces.
>
>> I've seen some comments about audio latency issues with nouveau
>> and akmod-nvidia, and I know that nouveau and akmod-nvidia clash.
>> If nouveau is causing really bad audio latency, it should be reported.
>
> I'll try to, but it will have to wait for a couple of weeks (trip coming
> up with the usual craziness of trying to finish up things before
> leaving[*]).
>
>> Thanks for building the akmod for nvidia, and I hope your changes get
>> merged into rpmfusion.  I have been using the akmod since f10 with
>> no problems.  Except I had some problems with it on f13 on my new
>> laptop, so I switched to nouveau, and after I cleaned out all the
>> nvidia stuff it works fine.
>
> Good!
> -- Fernando
>
> [*] nothing's easy, on the new laptop I'm using fc13 and the version of
> evolution that comes with it is not happy with all my email data - for
> some reason it refuses to show the INBOX of my main account, everything
> else is fine, so now I'm trying to move to thunderbird (something I've
> been meaning to do for a while).
>
>
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