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Cri

April 10, 2015 22:59:46

Hi, I installed the jammr-client .deb package on my Debian system, but when I run jammr, I only get the following messages:

ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_dmix.c:961:(snd_pcm_dmix_open) The dmix plugin supports only playback stream
Cannot connect to server socket err = File o directory non esistente
Cannot connect to server request channel
jack server is not running or cannot be started

…and the process hangs until I ctrl-C.

Is the jack server required to run jammr? (I have pulseaudio on my system)
Or is there any other problem?

stefanha

April 11, 2015 06:56:33

No, JACK is not required. The reason you see the message is because jammr uses the PortAudio cross-platform audio library. PortAudio will try various sound systems (ALSA, JACK, etc) and it's normal for some of them to fail.

The jammr window should open with a login or audio setup dialog box.

Please send the contents of the log file (if it exists):
~/.local/share/jammr/jammr/log.txt

It would also be helpful to see a stack trace. You can use gstack(1) to get a stack trace:
$ sudo apt-get install gdb qtbase5-dbg libogg-dbg libvorbis-dbg portaudio19-dbg libportmidi-dbg
$ jammr &
…wait until you feel the program hangs…
$ gstack $(pgrep jammr)

Thanks,
Stefan

Cri

April 11, 2015 10:15:34

Thanks! I'm attaching my log.txt (though it doesn't look very helpful I guess). I also tried following your instructions to get a stack trace but with the following problems:
There are no packages in Debian for libportmidi-dbg and portaudio19-dbg (I've installed all other packages you mentioned)
There is no gstack in Debian, so I used pstack instead

Here is the output:

pstack $(pgrep jammr)
19728: jammr
(No symbols found)
crawl: Input/output error
Error tracing through process 19728
0xb60871c1: ????

Cri

April 11, 2015 10:16:41

BTW your package is meant for Ubuntu systems, and I'm on a Debian system, I suspect maybe there are some unfulfilled dependencies (which are installed by default on Ubuntu and not in Debian); for example, I don't have KDE or other QT applications installed, so I suspect I could miss some essential (lib)qt packages. I'm attaching the list of qt packages I've on my system, maybe you can spot some obvious missing packages?
Thanks a lot!

stefanha

April 11, 2015 16:38:44

Cri
BTW your package is meant for Ubuntu systems, and I'm on a Debian system, I suspect maybe there are some unfulfilled dependencies (which are installed by default on Ubuntu and not in Debian); for example, I don't have KDE or other QT applications installed, so I suspect I could miss some essential (lib)qt packages. I'm attaching the list of qt packages I've on my system, maybe you can spot some obvious missing packages?Thanks a lot!

If “dpkg -i jammr-client_i386.deb” worked without errors then you have the dependencies installed.

stefanha

April 11, 2015 16:49:26

It seems gdb (pstack) couldn't cope with the stripped /usr/bin/jammr binary, so the stack trace is empty.

I will send you a link to a non-stripped version of the same binary. That should make pstack work.

If all else fails you could try building jammr from source:
https://github.com/stefanha/wahjam/releases/tag/jammr-1.2.4

# apt-get install -y language-pack-en build-essential dh-make
# apt-get install -y qt5-default libogg-dev libvorbis-dev portaudio19-dev libportmidi-dev
# cd jammr
# dpkg-buildpackage -us -uc

Cri

April 12, 2015 11:40:55

stefanha
It seems gdb (pstack) couldn't cope with the stripped /usr/bin/jammr binary, so the stack trace is empty.I will send you a link to a non-stripped version of the same binary. That should make pstack work.

Tried this, I only get this output from pstack:

'linux-gate.so.1': opening object file: No such file or directory
Could not open object file.

stefanha
If all else fails you could try building jammr from source

Built it and installed it. I get the same results as with the package downloaded from the website, same content in log.txt, and same message in the terminal

ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side

(the messages about JACK disappeared, also with the old binary, I guess maybe there was some application using the audio device)

I'm still convinced that I miss some software component, but just to make sure: are there any hardware requirements for my soundcard? I'm on a small netbook with onboard Realtek ALC269VB soundcard.

adi

April 12, 2015 12:03:34

Cri
I'm still convinced that I miss some software component,

try ubuntu studio lts on usb with unetbootin all as live cd. no installation required. i often connect with this software. See there dependencies and judge about transfer in debian. ubuntu uses to be a debian based too.

stefanha

April 13, 2015 14:47:43

Hi Cri,
Let's drop pstack(1). You might be able to get better results with gdb(1):
$ gdb /usr/bin/jammr
(gdb) r
…wait until it hangs and then press Ctrl+C in the terminal…
(gdb) thread apply all bt

This will print a stack trace for all threads.

Regarding sound device requirements, there are no error messages indicating this. The ALSA warnings you posted are probably harmless.

Stefan

Cri

April 13, 2015 15:44:40

Thank you very much for your instructions! I'm attaching the output of gdb (I recorded it in a script(1) session, hope it's OK)
This was done running my locally compiled jammr binary (see next message for the test with the non-stripped binary you sent me)