Re: [linux-audio-dev] Re: pci gfx card / jack xruns / pci latencies

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Subject: Re: [linux-audio-dev] Re: pci gfx card / jack xruns / pci latencies
From: Paul Winkler (pw_lists_AT_slinkp.com)
Date: Wed Jul 21 2004 - 17:35:18 EEST


On Wed, Jul 21, 2004 at 02:49:46PM +0200, Florian Schmidt wrote:
> On Wed, 21 Jul 2004 14:22:12 +0200
> Maarten de Boer <mdeboer_AT_iua.upf.es> wrote:
>
> > Hello Florian,
> >
> > Is this with kernel 2.6.x or 2.4.x?
> >
> > I remember there were some problems with Matrox cards, that were
> > initially not included in the 2.4.x low-latency patch, but I thought
> > that at some point Andrew included them.
> >
> > http://www.eca.cx/lad/2002/06/0076.html
>
> Hi,
>
> thanks for your mail. It seems though that this is independent of the kernel version. I booted into 2.4.22 with LL+preempt and it shows the exact same behaviour as did 2.6.7 vanilla, 2.6.7-bk10-ck5-H3 and 2.6.8-rc1-mm1... I think the card is just not good.. I'm also wondering about the weird lspci -v output which reports no latency for the matrox card [and it's not bus master like all other pci devices i have]..

one other thing to try: be sure in you XF86Config you have
PciRetry set to off. From man mga:

       Option "PciRetry" "boolean"
              Enable or disable PCI retries. Default: off.

-- 

Paul Winkler http://www.slinkp.com


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