ALSA with Ubuntu 8.04

ALSA with Ubuntu 8.04

[Eliot Blennerhassett]

This just an FYI

In Ubuntu 8.04, ubuntu has packaged alsa-drivers including some out of 
tree drivers in a separate package: linux-ubuntu-modules-$kernelver

This gets installed in /lib/modules/$kernelver/ubuntu/sound

The only things installed in /lib/modules/$kernelver/sound are 
soundcore.ko and ac97_bus.ko

However, when you do a default "make install" from alsa-driver source, 
the modules get installed in /lib/modules/$kernelver/kernel/sound

So, now there are 2 copies of the drivers in different places.

I have taken to removing (moving away to say /root) 
/lib/modules/$kernelver/ubuntu/sound to avoid any confusion and some odd 
module versioning problems that I was having.

regards

Eliot.

Re: ALSA with Ubuntu 8.04

[Tobin Davis]

Actually, the best practice is to install your new drivers
in /lib/modules/`uname -r`/updates/sound.  depmod will automatically
detect these as newer than the other modules.  This is how I test new
alsa builds on my test platforms.

The sound modules in linux-ubuntu-modules are modified from the stock
version of alsa that comes with the kernel in Ubuntu.  The patches are
NOT for release into upstream alsa, as they have already been submitted
and are in 1.0.16 and later (I know, I wrote them).

Tobin Davis


On Thu, 2008-06-26 at 11:47 +1200, Eliot Blennerhassett wrote:

> This just an FYI
> 
> In Ubuntu 8.04, ubuntu has packaged alsa-drivers including some out of 
> tree drivers in a separate package: linux-ubuntu-modules-$kernelver
> 
> This gets installed in /lib/modules/$kernelver/ubuntu/sound
> 
> The only things installed in /lib/modules/$kernelver/sound are 
> soundcore.ko and ac97_bus.ko
> 
> However, when you do a default "make install" from alsa-driver source, 
> the modules get installed in /lib/modules/$kernelver/kernel/sound
> 
> So, now there are 2 copies of the drivers in different places.
> 
> I have taken to removing (moving away to say /root) 
> /lib/modules/$kernelver/ubuntu/sound to avoid any confusion and some odd 
> module versioning problems that I was having.
> 
> regards
> 
> Eliot.
> 
> 
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

-- 
Tobin Davis 


Leela: "There it is, the near-death star." 

Re: ALSA with Ubuntu 8.04

[Takashi Iwai]

At Thu, 26 Jun 2008 11:47:13 +1200,
Eliot Blennerhassett wrote:
> 
> This just an FYI
> 
> In Ubuntu 8.04, ubuntu has packaged alsa-drivers including some out of 
> tree drivers in a separate package: linux-ubuntu-modules-$kernelver
> 
> This gets installed in /lib/modules/$kernelver/ubuntu/sound
> 
> The only things installed in /lib/modules/$kernelver/sound are 
> soundcore.ko and ac97_bus.ko
> 
> However, when you do a default "make install" from alsa-driver source, 
> the modules get installed in /lib/modules/$kernelver/kernel/sound
> 
> So, now there are 2 copies of the drivers in different places.
> 
> I have taken to removing (moving away to say /root) 
> /lib/modules/$kernelver/ubuntu/sound to avoid any confusion and some odd 
> module versioning problems that I was having.

FYI, the installation path can be specified via --with-moddir
configure option, too.


Takashi

Re: ALSA with Ubuntu 8.04

[Ben Stanley]

I happened to be in this territory a couple of nights ago... so here's a
summary of what I learned.

The priority order for the case of multiple modules with the same name
may be controlled by modifying /etc/depmod.conf .

As Takashi says, and quoting from `man depmod.conf`:

By default, depmod will give a higher priority  to  a  directory
with  the  name  updates  using  this  built-in  search  string:
"updates built-in" but more complex  arrangements  are  possible
and are used in several popular distributions.


Other directories may be given priority by specifying your own search
line as follows:
in /etc/depmod.conf
-------------------------
search my-custom-drivers updates built-in
-------------------------

After installing a new module (and perhaps manually running depmod), you
can check which module will actually be used with
grep my-module-name /lib/modules/`uname -r`/modules.dep

This takes out all the guesswork and makes success a 'sure thing' :-) .

Ben Stanley.


On Thu, 2008-06-26 at 11:47 +1200, Eliot Blennerhassett wrote:
> This just an FYI
> 
> In Ubuntu 8.04, ubuntu has packaged alsa-drivers including some out of 
> tree drivers in a separate package: linux-ubuntu-modules-$kernelver
> 
> This gets installed in /lib/modules/$kernelver/ubuntu/sound
> 
> The only things installed in /lib/modules/$kernelver/sound are 
> soundcore.ko and ac97_bus.ko
> 
> However, when you do a default "make install" from alsa-driver source, 
> the modules get installed in /lib/modules/$kernelver/kernel/sound
> 
> So, now there are 2 copies of the drivers in different places.
> 
> I have taken to removing (moving away to say /root) 
> /lib/modules/$kernelver/ubuntu/sound to avoid any confusion and some odd 
> module versioning problems that I was having.
> 
> regards
> 
> Eliot.
> 
> 
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel