Re: [LAU] Linux-audio-user Digest, Vol 29, Issue 10

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To: <linux-audio-user@...>
Date: Thursday, July 9, 2009 - 7:31 pm

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Message: 4
Date: Wed, 8 Jul 2009 17:59:52 -0700
From: munkeyfreenix batcat

Hi, welcome.

A few comments:

1. The RT kernel is the linux real time kernel, and you can get it with any
distro. How your particular distro decides to provide it for you is one of
the things that make distros different. Since Ubuntu is debian-based, it
uses apt-get (or synaptics gui front end) as the package management system.
I'm not sure if you can apt-get the real-time kernel from there. On gentoo,
one runs 'emerge gentoo-sources', which grabs the kernel source tree and
places it in /usr/src/linux. For gentoo, then you need to configure and
compile your own kernel. Ubuntu was designed with the idea that users would
never really compile their own kernel. I left ubuntu because I couldn't get
alsa or jack to work properly, and felt as detached from the system as I di=
d
on windoze.

2. Is Alsa started? I imagine Ubuntu should start alsa on startup, but look
into whether or not your alsa drivers have been configured properly. It wil=
l
probably be different for you, but something like '/etc/init.d/alsasound
status' will tell you if its started or stopped. if its stopped, rerun that
command and replace status with start, or --verbose start if it fails to
start.

3. You probably don't know if the alsa drivers are compiled into the kernel
or as loadable modules, but should find out. I found that in-kernel alsa
drivers just don't work, so I compile them all as modules and have them loa=
d
at boot. 'lsmod |grep -i snd' should show if alsa drivers are=A0 loaded, an=
d
which ones. if you don't get anything that way, try 'modprobe -l | grep -i
snd'. This will list all available LKM (loadable kernel modules). Perhaps
the soundblaster driver has not been loaded. If you find the right module,
but its not showing in lsmod, do 'modprobe '. That will load
the driver.

4. Check the Alsa wiki and site. Check them again. Also look at kernel.org:
http://www.kernel.org/doc/Documentation/sound/alsa/ALSA-Configuration.tx...

5. If you can't get things going under Ubuntu within a week, ditch ubuntu
(personal opinion). Linux audio is NOT easy, nor for those not willing to
work to make it work. Try other distros like openSUSE, arch linux, gentoo,
centOS. Ubuntu is a great intro, but you may want something more flexible t=
o
handle problems like these. Also keep in mind that a tough install also
usually has more rewards, since you must learn your machine up front.

best,
justin

On Mon, Jun 22, 2009 at 8:09 PM, wrote:

> I have two Ubuntu computers, one running 8.04 and the other running 9.04.

Tried most of the distros you suggested and have settled with ubuntu studio=
. None of them are perfect and they all have flaws.=A0 Just installed the R=
T kernel and works well from the repos.=A0 Nothing synaptic cannot handle. =
Check the forums -- particularly http://www.ubuntuforums.org and you will s=
ee a number of things where I personally have worked through some issues. W=
ould be happy to help share what I know.
=A0 Paul

=0A=0A=0A
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<blockquote>Message: 4Date: Wed=
, 8 Jul 2009 17:59:52 -0700From: munkeyfreenix batcat <munkeyfreenix.batcat@gmail.com>Hi, welcome.A few comments:1. The RT kernel is the li=
nux real time kernel, and you can get it with anydistro. How your parti=
cular distro decides to provide it for you is one ofthe things that mak=
e distros different. Since Ubuntu is debian-based, ituses apt-get (or synaptics gui fron=
t end) as the package ma=
nagement system.I'm not sure if you can apt-get the real-time ke=
rnel from there. On
gentoo,one runs 'emerge gentoo-sources', which grabs the kernel source=
tree andplaces it in /usr/src/linux. For gentoo, then you need to conf=
igure andcompile your own kernel. Ubuntu was designed with the idea tha=
t users wouldnever really compile their own kernel. I left ubuntu becau=
se I couldn't getalsa or jack to work properly, and felt as detached fr=
om the system as I didon windoze.2. Is Alsa started? I imagine =
Ubuntu should start alsa on startup, but lookinto whether or not your a=
lsa drivers have been configured properly. It willprobably be different=
for you, but something like '/etc/init.d/alsasoundstatus' will tell yo=
u if its started or stopped. if its stopped, rerun thatcommand and repl=
ace status with start, or --verbose start if it fails tostart.3=
. You probably don't know if the alsa drivers are compiled into the kernel<=
br>or as loadable modules, but should find out. I found that
in-kernel alsadrivers just don't work, so I compile them all as module=
s and have them loadat boot. 'lsmod |grep -i snd' should show if alsa d=
rivers are  loaded, andwhich ones. if you don't get anything that =
way, try 'modprobe -l | grep -isnd'. This will list all available LKM (=
loadable kernel modules). Perhapsthe soundblaster driver has not been l=
oaded. If you find the right module,but its not showing in lsmod, do 'm=
odprobe <module-name>'. That will loadthe driver.4. Check=
the Alsa wiki and site. Check them again. Also look at kernel.org:http://www.kernel.org/doc/Documentation=
/sound/alsa/ALSA-Configuration.txt
5. If you can't get th=
ings
going under Ubuntu within a week, ditch ubuntu(personal opinion). Linu=
x audio is NOT easy, nor for those not willing towork to make it work. =
Try other distros like openSUSE, arch linux, gentoo,centOS. Ubuntu is a=
great intro, but you may want something more flexible tohandle problem=
s like these. Also keep in mind that a tough install alsousually has mo=
re rewards, since you must learn your machine up front.best,jus=
tinOn Mon, Jun 22, 2009 at 8:09 PM, <webmaster@seconnecticut.com>=
wrote:> I have two Ubuntu computers, one running 8.04 and the o=
ther running 9.04.> Since Ubuntu is said to offer a RT kernel and a =
version that has been> customized for audio work, I was surprised to=
find that it is not so easy> to> configure audio in Ubuntu.
Debian recognized my SoundBlaster audigy card> immediately and used=
it. For Ubuntu the small app that is supposed to> select> th=
e sound card doesn't seem to do anything.>> So I started aski=
ng questions of Google and found that there are a number> of> people who are h=
aving difficulty configuring Soundblaster on Ubuntu. It> looks to be=
a chronic problem.>> Aside from that SlashDot.org had a link to this last week, although it&gt=
; seems> to be vintage 2007.>>> http://blogs=
.adobe.com/penguin.swf/2007/05/welcome_to_the_jungle.html
&gt=
;> There
is a map of Linux Audio Applications that looks to be useful> docum=
entation. Any comments on the rather critical note ?>>Tried most of the distros you suggested and have settled with ubuntu studi=
o. None of them are perfect and they all have flaws.  Just installed t=
he RT kernel and works well from the repos.  Nothing synaptic cannot h=
andle. Check the forums -- particularly http://www.ubuntuforums.org and you=
will see a number of things where I personally have worked through some is=
sues. Would be happy to help share what I know.  Paul=0A=0A
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