New subject: [linux-audio-dev] Re: [Fwd: ams segmentation fault]

29 Dec 2002

I don't know whether this is a bug in ams, or a problem with my
system...I suspect the later, but can't figure out what's wrong.

But, I am unable to get ams to run. It appears to compile OK. But, as
noted below, running it results in a "Segmentation fault".

I have installed qt3 and fftw. I edited the top of make_ams to match my
system:

box1:~/audio_code/ams-1.5.5$ head -5 make_ams 
QT_BASE_DIR=/usr/lib/qt3
QT_LIB_DIR=$(QT_BASE_DIR)/plugins-mt/styles
QT_BIN_DIR=/usr/bin
QT_INCLUDE_DIR=/usr/include/qt
X11_LIB_DIR=/usr/X11R6/lib

My ditribution is Debian stable (woody). My system is a PII 400Mhz
w/768MB RAM.
The version of g++ is 2.95.4.

I have a working install of jackd 0.44.0 from cvs. I'm starting jackd
like so:

# jackd -v -R -d alsa -d ymfpci -r 44100 -zt -n 3 -p 512

I can start up multiple instances of jack_metro, connect them to the
alsa ports and hear the beeps. So, jack appears to be working.

But, if I start ams nothing is reported in the jackd output about a new
client. 

ams does attempt to connect to the X server when started. I know this
because if I 'su -' to get to root and then start ams:

box1:/home/eric/audio_code/ams-1.5.5# ./ams 
ams: cannot connect to X server

but, if I su without the dash so that root inherits my user environment
ams gets past the point of connecting to the X server (assuming that
comes first) and exits with a segmentation fault.

I'm not sure what other information would be useful to you in helping me
to sort this out. If there is anything else I should tell you, please
let me know.

Thanks in advance,
Eric Rz.

-------- Original Message --------
Subject: ams segmentation fault
Date: Sat, 28 Dec 2002 21:47:34 -0500
From: Eric Dantan Rzewnicki &lt;eric(a)zhevny.com&gt;
Organization: zhevnycom
To: Eric Dantan Rzewnicki &lt;rzewnickie(a)rfa.org&gt;
CC: linux-audio-user(a)music.columbia.edu
References: &lt;3E0BCBEC.9DB82093(a)zhevny.com&gt;
&lt;20021227103148.GH681(a)ecs.soton.ac.uk&gt;
<1041005858.4921.17.camel@eviltwin> &lt;20021227181307.GD19938(a)rfa.org&gt;

Eric Dantan Rzewnicki wrote:
...
  I can now start jackd as root and
 then start ams -j. Sorry I didn't think of this earlier. :-\

 Adding /usr/local/lib to /etc/ld.so.conf and running ldconfig as Steve
 suggested allows ams to find libjack.so.0 (I really should have
 remembered that piece, too).

 Now that I have it running I'll go finish reading the ams documentation
 and figure out how to use it. :) 
hmm... I perhaps spoke too soon.

I had ams working yesterday on one box (at the office)... But, now I
can't seem to get it working at home. It seems to compile fine, but when
i try to start it:

box1:/home/eric/audio_code/ams-1.5.5# ./ams
Segmentation fault
box1:/home/eric/audio_code/ams-1.5.5# ./ams -j 
Segmentation fault

It doesn't matter if jackd is running or not. Either way it seg
faults...

What could cause this?

What information should I provide to help sort this out? 

Thanks,
Eric Rz.

[linux-audio-dev] [Fwd: ams segmentation fault]