[LAD] 2.6.31.x vs. rme vs. alsa 1.0.22?

[James Warden]

--- On Wed, 2/17/10, Fernando Lopez-Lezcano <nando at ccrma.Stanford.EDU> wrote:

> From: Fernando Lopez-Lezcano <nando at ccrma.Stanford.EDU>
> Subject: Re: [LAD] 2.6.31.x vs. rme vs. alsa 1.0.22?
> To: "Raphaël Doursenaud" <rdoursenaud at free.fr>
> Cc: linux-audio-dev at lists.linuxaudio.org
> Date: Wednesday, February 17, 2010, 3:53 PM
> On Wed, 2010-02-17 at 06:30 +0100,
> Raphaël Doursenaud wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> > 
> > Le 17/02/2010 02:58, Fernando Lopez-Lezcano a écrit
> :
> > > Hey, has anyone been seeing strange behavior from
> this combination?
> > > 
> > >   kernel 2.6.31.x rt20 + alsa
> 1.0.22 userland
> > >   RME card (pcmcia card +
> multiface)
> > > 
> > > hdspmixer is not doing the right thing (does not
> initialize the card in
> > > a way in which playback works), it does not see
> the hwdep interface (or
> > > something like that) and disables metering,
> alsamixer even segfaults
> > > when I reach the end of the controls listed.
> Plain weird. Smells like
> > > something changed deep in the kernel that makes
> alsa-lib very unhappy.
> > > Alsa-tools rebuilt from source does not make a
> difference. 
> > > 
> > > Weirdness goes away when I boot into 2.6.29.6
> rt23...
> > > 
> > > Is there anything in alsa-* that depends on which
> _kernel_ is available
> > > at compile time?
> > > 
> > Hi,
> > 
> > I'm actually using a similar combination on my gentoo
> without problem
> > (PCI card).
> > 
> > AFAIK the only difference between 2.6.30 and 2.6.31
> for the hdsp is a
> > patch I made allowing the firmware to be built inside
> the kernel. It
> > should not have this kind of side-effect.
> 
> The difference is between 2.6.29 and > 2.6.29 (I tested
> with 31 but  at
> least another of my users is having a problem with 30). 
> 
> Firmware seems to be loading fine. 
> 
> > I'll check on my notebook with the PCMCIA card as soon
> as I can.
> 
> Thanks, would be good to know. 
> 
> > If you're using a custom built kernel you might want
> to try with the
> > firmware built-in.
> 
> It does not look like it is the firmware, I think that when
> the firmware
> does not load the card does not even appear in alsa. The
> problem I'm
> seeing is userland confused about what the kernel can do
> (or at least it
> appears to be that way). Very weird. 
> 
> -- Fernando
> 
> 

could it be the PCMCIA part ? I have the PCI version and both 2.6.31.x and 2.6.32 are working as they should with my RME HDSP and Multiface II.


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