Loading the OSS modules on the XO

[pgf at laptop.org]

jim wrote:
 > I thought there was a library/shim/kernel option that allowed us to
 > emulate OSS on ALSA?

i think that's what snd-pcm-oss is.

 > 
 > In any case, anything not using ALSA at this date really should get
 > updated to ALSA....
 >                          - Jim
 > 
 > 
 > 
 > On Wed, 2008-08-13 at 10:43 -0400, pgf at laptop.org wrote:
 > > shivaprasad wrote:
 > >  > Its OK if I need to have root permissions only once right? I can change the
 > > 
 > > yes.
 > > 
 > >  > /etc/modules/ once during installation of the activity and need not load 
 > the
 > >  > module every time I run the activity. I am new programming on Linux and
 > >  > wasnt sure what to change to make the XO load the oss module on startup. So
 > >  > my plan is if I  know how to make the XO load the  oss modules  I can do
 > >  > this in a script and run the script during installation of the activity so
 > >  > that when I launch the activity I would not need root permission.Could you
 > >  > please tell me how to change /etc/modules to load oss modules on startup?
 > > 
 > > the file /etc/modules that erik mentioned isn't used on the XO, but
 > > there's a similar mechanism in place.
 > > 
 > > create a new file /etc/sysconfig/modules, with a name that ends
 > > in ".modules", like "oss.modules".  that file should be an executable
 > > shell script which will load the modules you want.  see the existing
 > > "olpc-1.modules" file in that directory as an example, but probably
 > > all you need is a single "modprobe snd-pcm-oss" command.
 > > 
 > > this should cause your module to be installed when the XO boots.
 > > 
 > > paul
 > > 
 > >  > 
 > >  > Thanks
 > >  > Shivaprasad
 > >  > 
 > >  > On Wed, Aug 13, 2008 at 6:54 PM, Erik Garrison <erik at laptop.org> wrote:
 > >  > 
 > >  > > On Wed, Aug 13, 2008 at 06:16:58PM +0530, shivaprasad javali wrote:
 > >  > > > Hi,
 > >  > > >
 > >  > > >    I am porting a application to the XO. It uses the OSS sound Api's to
 > >  > > > render sound. I found that the oss modules are not loaded on the xo by
 > >  > > > default. I was able to load the oss modules by running modprobe
 > >  > > snd-pcm-oss
 > >  > > > which created the /dev/dsp and other device files required by the oss
 > >  > > > modules and was able to run my application on the XO. But the problem 
 > is
 > >  > > > every time I reboot the XO I will have to run the commands and load the
 > >  > > oss
 > >  > > > modules.
 > >  > > >
 > >  > > >    Is there any way I can tell the XO to always load the oss modules?
 > >  > > Even
 > >  > > > if I have a script to run the commands on launching the application 
 > these
 > >  > > > commands would require super user privileges which I wont have when I
 > >  > > launch
 > >  > > > the application from the activity bar. Any Ideas?
 > >  > >
 > >  > > Without root access, your activity will have difficulty modifying
 > >  > > /etc/modules to enable autoloading the snd-pcm-oss module at boot.  I am
 > >  > > unsure if there is any way around this issue unless the deployment scope
 > >  > > for your activity is a set of machines on which you have root access.
 > >  > >
 > >  > > Erik
 > >  > >
 > >  > part 2     text/plain                 129
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 > > 
 > > =---------------------
 > >  paul fox, pgf at laptop.org
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 > -- 
 > Jim Gettys <jg at laptop.org>
 > One Laptop Per Child

=---------------------
 paul fox, pgf at laptop.org