Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-14 Thread Fernando Gomes
 If you won't build a kernel and apps yourself you should switch to AV
 Linux or Planet CCRMA etc. and avoid openArtist, Ubuntu Studio etc..
 Lurk Linux audio mailing lists ;).


I've already used AV Linux and Planet CCRMA before, but not after
upgrading my PC, I'll try them soon on it :-)

Following Mike's advice (and some work) I've at last a low latency
kernel on my Maverick installation :-)
For the current kernel versions available on Alessio PPA (for Natty)
the linux headers are needed, and for others with similar problems
that I had (putting a low latency kernel on a Ubuntu Maverick
installation), I've made a post on my 'web log', at
http://www.openstudio.info

Thanks and best regards

Fernando

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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-14 Thread Tim Cook
On Fri, 2011-01-14 at 18:12 +, Fernando Gomes wrote:
  and for others with similar problems
 that I had (putting a low latency kernel on a Ubuntu Maverick
 installation), I've made a post on my 'web log', at
 http://www.openstudio.info


Thank you ... worked like a champ on my Dell Inspiron.  

Cheers,
Tim



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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-14 Thread Ralf Mardorf
On Fri, 2011-01-14 at 18:12 +, Fernando Gomes wrote:
  If you won't build a kernel and apps yourself you should switch to AV
  Linux or Planet CCRMA etc. and avoid openArtist, Ubuntu Studio etc..
  Lurk Linux audio mailing lists ;).
 
 
 I've already used AV Linux and Planet CCRMA before, but not after
 upgrading my PC, I'll try them soon on it :-)
 
 Following Mike's advice (and some work) I've at last a low latency
 kernel on my Maverick installation :-)
 For the current kernel versions available on Alessio PPA (for Natty)
 the linux headers are needed, and for others with similar problems
 that I had (putting a low latency kernel on a Ubuntu Maverick
 installation), I've made a post on my 'web log', at
 http://www.openstudio.info
 
 Thanks and best regards
 
 Fernando

If the Maverick-Natty-Mix is ok, you should make a backup, before doing
upgrades. It's even dangerous to add third party repositories for the
used version of a Linux distro, that's why apps like synaptic and yast2
try to take care when upgrading. Yast2 ask you before switching
repositories for an upgrade and synaptic has got several options for
doing upgrades and a history.



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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-12 Thread Fernando Gomes
I commited the error of updating do Maverick to find out that there
was no 'special' kernel to it ;-)
I can tell you that using the standard Maverick Ubuntu Kernel i don't
have many issues, using hydrogen, rackarack and zynaddsubfx, even with
some processor hungry effects on rackarack.But today what are the
special (low latency, rt) kernels that can be used with maverick (even
not being specific to Maverick)? It seems that natty kernels from
Alessio could be used, I tried to add the ppa from Alessio to my
repositories, if i keep the Maverick label it doesn't add any new
kernel, if I change the label to Natty I get new kernels available,
but the intalation process fail because of missig dependencies. Any
tip on how to add a low latency or rt kernel to Maverick?

Best regards

Fernando

On Wed, Jan 12, 2011 at 9:18 AM, Bernard Hurley bern...@marcade.biz wrote:
 On Wed, Jan 12, 2011 at 12:59:35AM +0100, ailo wrote:
 As for Maverick, there seems to be no lowlatency or rt kernel for it, so
 perhaps it would be recommendable to try sticking with Lucid, until
 Natty can become a replacement.


 Thanks,

 Bernard


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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-12 Thread Mike Holstein
i am using abogani's kernels in both maverick and natty on a testing
machine, with great results... this is a nice guide i found when google-ing
'ubuntu 10.10 realtime kernel' about the 6th result down...

http://jackschnippes.freeunix.net/index.php/2010/11/04/lowlatency-kernel-and-realtime-kernel-for-ubuntu-10-10-maverick

the -lowlatency kernel in natty is even working very well with my firewire
device...

On Wed, Jan 12, 2011 at 5:42 AM, Fernando Gomes f.m.go...@gmail.com wrote:

 I commited the error of updating do Maverick to find out that there
 was no 'special' kernel to it ;-)
 I can tell you that using the standard Maverick Ubuntu Kernel i don't
 have many issues, using hydrogen, rackarack and zynaddsubfx, even with
 some processor hungry effects on rackarack.But today what are the
 special (low latency, rt) kernels that can be used with maverick (even
 not being specific to Maverick)? It seems that natty kernels from
 Alessio could be used, I tried to add the ppa from Alessio to my
 repositories, if i keep the Maverick label it doesn't add any new
 kernel, if I change the label to Natty I get new kernels available,
 but the intalation process fail because of missig dependencies. Any
 tip on how to add a low latency or rt kernel to Maverick?

 Best regards

 Fernando

 On Wed, Jan 12, 2011 at 9:18 AM, Bernard Hurley bern...@marcade.biz
 wrote:
  On Wed, Jan 12, 2011 at 12:59:35AM +0100, ailo wrote:
  As for Maverick, there seems to be no lowlatency or rt kernel for it, so
  perhaps it would be recommendable to try sticking with Lucid, until
  Natty can become a replacement.
 
 
  Thanks,
 
  Bernard
 
 
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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-12 Thread Ralf Mardorf
On Tue, 2011-01-11 at 10:54 -0600, Brian David wrote:
 For Maverick:
 
 There are no official real-time kernels available for Maverick.  Some
 people seem to have successfully used Bogani's Natty kernels with
 Maverick, so that is perhaps an option.  There are other PPAs
 available, as well, and you could build your own kernel, too.

I'm not copying from the terminal emulation, but typing it now, so there
might be some typos.

### Preparing to build the kernel

$ sudo -i
# uname -r

It should be 2.6.35-24-generic.

# synaptic

'fakeroot' might be already installed, but you additionally need to
install:

build-essential
crash
kexec-tools
makedumpfile
kernel-wedge

# apt-get build-dep linux

# synaptic

Install:

git-core
libncurse5
libncurse5-dev
asciidoc
binutils-dev
kernel-package

# usermod -a -G src your_username

Push Ctrl + D

$ cd /usr/src
$ wget ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.33.7.tar.bz2
http://www.kernel.org/pub/linux/kernel/projects/rt/patch-2.6.33.7.2-rt30.bz2

### Extracting the sources and patching the kernel
$ tar xjf linux-2.6.33.7.tar.bz2
$ rm linux-2.6.33.7.tar.bz2
$ mv linux-2.6.33.7 linux-2.6.33.7.2-rt30
$ ln -s linux-2.6.33.7.2-rt30 linux
$ cd linux
$ bunzip2 ../patch-2.6.33.7.2-rt30.bz2
$ patch -p1  ../patch-2.6.33.7.2-rt30
$ rm ../patch-2.6.33.7.2-rt30

### Editing a configuration

$ cp /boot/config-$(uname -r) .config
$ make oldconfig
GROUP_SCHED y
Complete Preemption
anything else just enter
$ make menuconfig
Correct timer from 250Hz to 1000Hz
and disable debug info. If you wish too, you can optimise to your CPU,
e.g. Opteron/Athlon64/Hamkmer/K8 instead of the default Pentium-Pro.
Save
$ make oldconfig
Ther should be nothing to do.
$ gedit .config
Edit CONFIG_STAGING=y to CONFIG_STAGING is not set (use Ctrl + F to find
it).
$make oldconfig
There shouldn't be anything to do.

### Building the kernel
$ make-kpkg clean
(On a multi-core computer only: $ export CONCURRENCY_LEVEL=2)
$ make-kpkg --rootcmd fakeroot --initrd kernel-image kernel-headers
$ sudo make clean
$ ls ..
$ sudo dpkg -i ../names_of_the_packages

While for this kernel-rt, for Lucid amd64, clean Ubuntu Studio, the
NVIDIA packages from the repositories will add modules to all kernels
in /boot, for Maverick this doesn't work on my Edubuntu + Ubuntu Studio
packages i386 Maverick.

Hth and that I didn't made to much typos or any other mistake when
writing this email,

Ralf


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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-12 Thread Ralf Mardorf
PS: Perhaps a package is missing :), so install it too, what I wrote +
additional package:
[snip]
 # synaptic
 
 Install:
 
 git-core
 libncurse5
 libncurse5-dev
libelf-dev
[snip]
 Correct timer from 250Hz to 1000Hz
Timerferq ;)


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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-12 Thread Ralf Mardorf
PPS:

On Tue, 2011-01-11 at 21:01 +, Bernard Hurley wrote:
 On Tue, Jan 11, 2011 at 10:54:51AM -0600, Brian David wrote:
  There are other issues with real-time in Maverick and Natty that have
  recently come to light.  This page will fill you in:
  
  http://jackaudio.org/linux_group_sched
 
 What is the stuff about cgroups about?
 
 Bernard

I marked this to read myself next weekend! Perhaps this is bad for my
HOWTO, if so, don't enable it.



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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-12 Thread Ralf Mardorf
On Tue, 2011-01-11 at 21:01 +, Bernard Hurley wrote:
 On Tue, Jan 11, 2011 at 10:54:51AM -0600, Brian David wrote:
   On a total tangent - can any of you comment (in lay terms if possible) on
   the real-time kernel? 
 
 Personally I am running Maverick but am using Bogani's Lucid kernel most of 
 the time but I have several kernels instlled so I can switch between them.
  
  For Lucid:
  
  There is a real-time kernel in the official Ubuntu repositiories, the
  package is called linux-rt.
 
 This is one of the kernels I have installed.
 
  
  There are no official real-time kernels available for Maverick.  Some
  people seem to have successfully used Bogani's Natty kernels
 
 I think maybe I will try this.
 
  
  There are other issues with real-time in Maverick and Natty that have
  recently come to light.  This page will fill you in:
  
  http://jackaudio.org/linux_group_sched
 
 What is the stuff about cgroups about?
 
 Bernard

Pooost scriptum:

spinymouse1...@suse11-2:~
cat /media/ded93dfb-37ae-48cf-a3a3-b613aa5704fd/boot/config-2.6.33.7.2-rt30 | 
grep RT_GROUP_SCHED
CONFIG_RT_GROUP_SCHED=y

Ok, I need to rebuild my kernel and if somebody will follow my howto
it's needed in /usr/src/linux to run

$ gedit .config

and then, by Ctrl + F to search for RT_GROUP_SCHED and to edit
CONFIG_RT_GROUP_SCHED=y to CONFIG_RT_GROUP_SCHED is not set ;).

I guess anything else should be ok :),but I'm not able to test it before
the next weekend or later.


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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-12 Thread Fernando Gomes
On Wed, Jan 12, 2011 at 5:45 PM, Mike Holstein mikeh...@gmail.com wrote:
 i am using abogani's kernels in both maverick and natty on a testing
 machine, with great results... this is a nice guide i found when google-ing
 'ubuntu 10.10 realtime kernel' about the 6th result down...
 http://jackschnippes.freeunix.net/index.php/2010/11/04/lowlatency-kernel-and-realtime-kernel-for-ubuntu-10-10-maverick
 the -lowlatency kernel in natty is even working very well with my firewire
 device...

Hi Mike

I was trying to get the files from the guide you refer, but for the
low latency 64 bit the links are not working:

http://ppa.launchpad.net/abogani/ppa/ubuntu/pool/main/l/linux-lowlatency/linux-headers-2.6.36-1-lowlatency_2.6.36-1.7~ppa2_amd64.deb
http://ppa.launchpad.net/abogani/ppa/ubuntu/pool/main/l/linux-lowlatency/linux-image-2.6.36-1-lowlatency_2.6.36-1.7~ppa2_amd64.deb

I've browsed the abogani ppa and there are only 2.6.37 kernels
(Natty). If I try to use them I have unresolved dependencies:

Depends: linux-headers-2.6.37-11  but it is not installable

Where can I find the  linux-headers-2.6.37-11 to add in order to solve
these dependencies on Maverick?

Best regards

Fernando

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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-12 Thread Mike Holstein
i just got the -lowlatency one, and i just installed the 2 main packages and
didnt use the one that had dependency issues... the -realtime one is older
anyways, and i think abogani said he needed to wait on something upstream
before making it... im finding great performance with the -lowlatency in
natty, at least comparable to -realtime in lucid... just grab the 2 other
.debs there and dont worry about the other one...

On Wed, Jan 12, 2011 at 6:20 PM, Fernando Gomes f.m.go...@gmail.com wrote:

 On Wed, Jan 12, 2011 at 5:45 PM, Mike Holstein mikeh...@gmail.com wrote:
  i am using abogani's kernels in both maverick and natty on a testing
  machine, with great results... this is a nice guide i found when
 google-ing
  'ubuntu 10.10 realtime kernel' about the 6th result down...
 
 http://jackschnippes.freeunix.net/index.php/2010/11/04/lowlatency-kernel-and-realtime-kernel-for-ubuntu-10-10-maverick
  the -lowlatency kernel in natty is even working very well with my
 firewire
  device...

 Hi Mike

 I was trying to get the files from the guide you refer, but for the
 low latency 64 bit the links are not working:


 http://ppa.launchpad.net/abogani/ppa/ubuntu/pool/main/l/linux-lowlatency/linux-headers-2.6.36-1-lowlatency_2.6.36-1.7~ppa2_amd64.deb

 http://ppa.launchpad.net/abogani/ppa/ubuntu/pool/main/l/linux-lowlatency/linux-image-2.6.36-1-lowlatency_2.6.36-1.7~ppa2_amd64.deb

 I've browsed the abogani ppa and there are only 2.6.37 kernels
 (Natty). If I try to use them I have unresolved dependencies:

 Depends: linux-headers-2.6.37-11  but it is not installable

 Where can I find the  linux-headers-2.6.37-11 to add in order to solve
 these dependencies on Maverick?

 Best regards

 Fernando

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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-12 Thread Ralf Mardorf
Pfff :(

I guess the dependencies will be found in the regular Ubuntu Natty
repositories ;).

I'm not sure if Ubuntu Studio or this list can be taken seriously,
because especially a real-time system needs to be proper.

There are reasons that Natty repositories are for Natty and not for
Maverick. Of cause, a lot of bins will work with any Linux, but IMHO
nobody should mess a real-time Linux with kernels for even other
versions of the same distro.

Yes, Hydrogen + a virtual guitar effect rack will work even when using a
generic kernel, but real-time is for music productions, hard disk
recording + sequencer + ... and not only for one, two, three, four chart
music.

On March the 3d in the Jazzclub Tonne Dresden Jasper van't Hof will play
my old DX7, http://www.youtube.com/watch?v=32baf2bTHBs , if somebody
should be in Dresden that time, you should visit the concert. Imagine a
Ubuntu Studio setup using Hexter on Ubuntu Studio instead, just
regarding to real-time (not regarding to the sound of Hexter) for the
kind of music Achim and Jasper do. If you play 'music', but four to the
flour or Metallica like trash your DAW needs to be stable without any
timing issues.

For music only a full real-time kernel is usable. Avoid PREEMPT without
RT or PREEMPT RT kernels for other versions of your distro. Will rtirq
from the repositories of the distro version you use, fit to kernels for
the next version of your distro etc. pp.? When using a kernel for
another version you need to take care about things like this.

If you won't build a kernel and apps yourself you should switch to AV
Linux or Planet CCRMA etc. and avoid openArtist, Ubuntu Studio etc..
Lurk Linux audio mailing lists ;).

2 Cents,

Ralf

On Wed, 2011-01-12 at 18:31 -0500, Mike Holstein wrote:
 i just got the -lowlatency one, and i just installed the 2 main
 packages and didnt use the one that had dependency issues... the
 -realtime one is older anyways, and i think abogani said he needed to
 wait on something upstream before making it... im finding great
 performance with the -lowlatency in natty, at least comparable to
 -realtime in lucid... just grab the 2 other .debs there and dont worry
 about the other one...
 
 On Wed, Jan 12, 2011 at 6:20 PM, Fernando Gomes f.m.go...@gmail.com
 wrote:
 On Wed, Jan 12, 2011 at 5:45 PM, Mike Holstein
 mikeh...@gmail.com wrote:
  i am using abogani's kernels in both maverick and natty on a
 testing
  machine, with great results... this is a nice guide i found
 when google-ing
  'ubuntu 10.10 realtime kernel' about the 6th result down...
 
 
 http://jackschnippes.freeunix.net/index.php/2010/11/04/lowlatency-kernel-and-realtime-kernel-for-ubuntu-10-10-maverick
  the -lowlatency kernel in natty is even working very well
 with my firewire
  device...
 
 
 Hi Mike
 
 I was trying to get the files from the guide you refer, but
 for the
 low latency 64 bit the links are not working:
 
 
 http://ppa.launchpad.net/abogani/ppa/ubuntu/pool/main/l/linux-lowlatency/linux-headers-2.6.36-1-lowlatency_2.6.36-1.7~ppa2_amd64.deb
 
 http://ppa.launchpad.net/abogani/ppa/ubuntu/pool/main/l/linux-lowlatency/linux-image-2.6.36-1-lowlatency_2.6.36-1.7~ppa2_amd64.deb
 
 I've browsed the abogani ppa and there are only 2.6.37 kernels
 (Natty). If I try to use them I have unresolved dependencies:
 
 Depends: linux-headers-2.6.37-11  but it is not installable
 
 Where can I find the  linux-headers-2.6.37-11 to add in order
 to solve
 these dependencies on Maverick?
 
 Best regards
 
 Fernando
 
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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-11 Thread Brian David
 On a total tangent - can any of you comment (in lay terms if possible) on
 the real-time kernel? I was under the impression that Ubuntu Studio utilizes
 a real time kernel, making it superior to other OS's, distros or flavors of
 Ubuntu. I thought I had read somewhere that this RTK has been abandoned and
 will not be available anymore? Comments?

 Casey


Here's the situation on real-time kernels.

For Lucid:

There is a real-time kernel in the official Ubuntu repositiories, the
package is called linux-rt.  It is not installed automatically by
Ubuntu Studio, because it is based off an older version of the vanilla
Ubuntu kernel.  It still works well, though.  A lot of people on this
list (perhaps most, and including myself) use the kernels in Alessio
Bogani's PPA, information for which can be found here:

https://launchpad.net/~abogani/+archive/ppa

For Maverick:

There are no official real-time kernels available for Maverick.  Some
people seem to have successfully used Bogani's Natty kernels with
Maverick, so that is perhaps an option.  There are other PPAs
available, as well, and you could build your own kernel, too.

For Natty:

At this point, the kernels available in Bogani's PPA are the wants you
will want to use for Natty.  There will no longer be any real-time
kernels in any official repositories, for various reasons, including
lack of enough support to maintain one.  It is a goal to have one of
the low latency kerenls that Bogani has developed be put into an
official repo for Natty, but I have not recently heard about how that
is going.

There are other issues with real-time in Maverick and Natty that have
recently come to light.  This page will fill you in:

http://jackaudio.org/linux_group_sched

I'm not positive about this, but I think Bogani's kernels have been
updated to solve this problem.

By the way, I'm glad to hear you've got your interface working.

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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-11 Thread Bernard Hurley
On Tue, Jan 11, 2011 at 10:54:51AM -0600, Brian David wrote:
  On a total tangent - can any of you comment (in lay terms if possible) on
  the real-time kernel? 

Personally I am running Maverick but am using Bogani's Lucid kernel most of the 
time but I have several kernels instlled so I can switch between them.
 
 For Lucid:
 
 There is a real-time kernel in the official Ubuntu repositiories, the
 package is called linux-rt.

This is one of the kernels I have installed.

 
 There are no official real-time kernels available for Maverick.  Some
 people seem to have successfully used Bogani's Natty kernels

I think maybe I will try this.

 
 There are other issues with real-time in Maverick and Natty that have
 recently come to light.  This page will fill you in:
 
 http://jackaudio.org/linux_group_sched

What is the stuff about cgroups about?

Bernard

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Re: Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-11 Thread ailo
On 01/11/2011 10:01 PM, Bernard Hurley wrote:
 On Tue, Jan 11, 2011 at 10:54:51AM -0600, Brian David wrote:
 On a total tangent - can any of you comment (in lay terms if possible) on
 the real-time kernel? 
 
 Personally I am running Maverick but am using Bogani's Lucid kernel most of 
 the time but I have several kernels instlled so I can switch between them.

 For Lucid:

 There is a real-time kernel in the official Ubuntu repositiories, the
 package is called linux-rt.
 
 This is one of the kernels I have installed.
 

 There are no official real-time kernels available for Maverick.  Some
 people seem to have successfully used Bogani's Natty kernels
 
 I think maybe I will try this.
 

 There are other issues with real-time in Maverick and Natty that have
 recently come to light.  This page will fill you in:

 http://jackaudio.org/linux_group_sched
 
 What is the stuff about cgroups about?
 
 Bernard
 

cgroups only affects the Natty's generic kernel, to my knowlegde.
It makes realtime impossible for a standard installation of jack and
jack applications, even when belonging to audio group.
This does not happen on Alessio Boganis -lowlatency kernel for Natty.

As for Maverick, there seems to be no lowlatency or rt kernel for it, so
perhaps it would be recommendable to try sticking with Lucid, until
Natty can become a replacement.

-- 
ailo

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Fernando's comment on Ubuntu Distro's where the Tascam US-122 worked out of the box

2011-01-09 Thread Casey Forslund
Hey again Fernando,

Thanks for your additional comments and suggestions. Yes, it is definitely a
plain US-122. I would LOVE to hear about distros you found where it worked
out of the box - that would be a dream come true.

On a total tangent - can any of you comment (in lay terms if possible) on
the real-time kernel? I was under the impression that Ubuntu Studio utilizes
a real time kernel, making it superior to other OS's, distros or flavors of
Ubuntu. I thought I had read somewhere that this RTK has been abandoned and
will not be available anymore? Comments?

Casey
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