[App_rpt-users] Finally....

Jim Duuuude telesistant at hotmail.com
Sat Jul 20 13:05:15 EDT 2013

Well yes Ty, that is *precisely* one of the reasons that I am "pushing"
to get this resolved. Yes, you *DID* do a marvelous job making that work,
and I *REALLY* want to see that effort be 100% usable (since that seems to
be the only thing "holding it back").


From: ty at sarna.org
Date: Sat, 20 Jul 2013 10:42:06 -0400
To: app_rpt-users at ohnosec.org
Subject: Re: [App_rpt-users] Finally....

Note to anyone interested in working on this, I already got ACID ported to CentOS 6 and it works OKaside from the audio issues (I'm running it on a hub and it's fine).
So, if anyone has time to work on the audio issues and wantsaccess to the CentOS 6 ACID image for testing/development purposes,I think Jim has it available in a "secret" location. If not, contactme and I'll hook you up.
I agree that porting to ALSA is probably the way to go,but I haven't had time to look at it -- too many other ironsin the fire at the moment.
On Jul 17, 2013, at 2:42 AM, Jim Duuuude <telesistant at hotmail.com> wrote:The kernel in Centos 6.X *does* have it installed and
supposedly "working", but sadly it does not.


Date: Wed, 17 Jul 2013 02:07:54 -0400
From: bobtenty at gmail.com
To: app_rpt-users at ohnosec.org
Subject: Re: [App_rpt-users] Finally....

Regarding OSS in linux

In the kernels of Ubuntu 12 .04 and later OSS support (OSS to ALSA emulation
is switched off (depreciated) and is or will happen with more distro's
What you can do is to install OSS4 (oss4-base & oss4-dkms ), with oss4-dkms new
oss modules will be compiled and installed from source in the background every-time 
a new kernel will be installed. OSS4 uses new name modules and devices but
will also create soft-links with the old legacy devices /dev/dsp & /dev/mixer to the
new oss4 devices.
I installed the libasound2 library and pulseaudio and did set the config file of
libasound2 to use pulseaudio and  pulseaudio to output OSS
Now we can use programs that interface with  both ALSA and OSS.

It is also possible to not install pulse audio and only OSS4 and libasound2
and also to use  OSS and ALSA talking programs (this need a different 
libasound2 config.)
Something along the same line is valid for other distro's.


Bob / Boudewijn VE3TOK

On 13-07-16 01:46 PM, Jim Duuuude wrote:
Finally, I think we have managed to "close the chapter" in the miserable
quest for accurate information to allow for proper compilation of the
USB-related audio channel drivers, regarding the "proc/sys file structure"
of various Linux kernels, etc.

As it turns out, the "major" change in that area happened in Linux Kernel
2.6.20, as the new release of ALSA at that time (1.0.19) did some changes in 
that area. In addition, to allow for "backwards compatibility", a new kernel
parameter (CONFIG_SYSFS_DEPRECATED) was added to allow for "newer"
kernels to use the "old structure" for the /sys filesystem entries.

So, all of the Centos 5.X kernels, are 2.6.18-based, and are pre-changes.
Limey Linux, which is a 2.6.30 kernel, has the CONFIG_SYSFS_DEPRECATED
parameter enabled, so it "acts" like a pre 2.6.20 kernel in that repsect also.
Pickle, is a 2.6.35 (as I recall), and follows the "current" way of doing things.

Now, the build scripts and sources (in SVN) take all this into account, and seem
to properly build in all the OS's that we support.

Since this is (hopefully) *FINALLY* done, it would be nice to "move on" to the
next UTTERLY MISERABLE festering technical issue with app_rpt: The fact that
the OSS audio support in the newer kernels (like the one used in Centos 6.X)
seems to be SERIOUSLY broken.

It is entirely possible that if chan_simpleusb and chan_usbradio were modified
to use ALSA directly, instead of using the OSS compatibility layer (as it does now),
it *MIGHT* fix this problem (and might also allow newer ARM implementations,
such as the Pi, etc) to work properly, at least with chan_simpleusb.

This is not, by any means, a simple task. Nor does it even guarantee that it will
do any good. We don't *KNOW* that this is problem. It just seems like a reasonable
guess at this point.

Is there anyone out there that is capable and willing to attempt to port (particularly
chan_simpleusb at first) to "native ALSA"?? It sure would be nice. I am EXTREMELY BUSY
and just can't do everything here (technically).


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