I think I've found the way of having Sound work OK in KDE.
I used a combination of several preexistent methods, based on OSS
redirection to ESD.
I've did it in a test environment, with Debian testing, KDE 3.5.4 and
LTSP 4.2 running on an AMD K7 with 1.5GiB RAM, and an EPATec eTHinClient
as server (which forced to specify the sound module sis7019).
Let me introduce myself before going into it. I'm Noel Torres, master
technician and developer of Ejercicios Resueltos SLU, a company from
Canary Islands which works into LTSP classrooms, general Linux teaching
and system maintenance. We also participated, as members of Grupo CPD,
in the development of mEDUXa Linux 1.0, the educative Linux distro of
the Canary Islands Autonomous Government.
Going into matter:
Firstly, I configured my thin clients to have a working ESD using
SOUND = Y
SOUND_DAEMON = esd
as said in Wiki. Then, I created a script (It needs to be modified for
Debian, as stated below) saying
REMOTE_X11=${DISPLAY%:*}
if test "$REMOTE_X11" == ""
then
export REMOTEX_11=false
else
export ESPEAKER=$REMOTE_X11:16001
export ESDDSP_MIXER=1
export LD_PRELOAD="/usr/lib/libesddsp.so.0 /usr/lib/libesd.so.0
$LD_PRELOAD"
export REMOTE_X11=true
fi
as said in Wiki too, but I didn't place it at xdm nor any other DM, but
on $HOME/.kde/env directory for every single user with name
"startsound.sh". This is not very well documented by KDE, but scripts on
that subdirectory are executed from within KDE when it starts, and
environment variables you set in those scripts are available to any
application started from KDE, which includes almost everything.
Finally, I set KDE to use OSS. This way, all apps using KDE are sounding
through OSS which is redirected to ESD, which in turn is sent to
client's ESD and client's speakers, and apps trying to use OSS directly
are in the same case.
Additional note: in Debian you must modify
export LD_PRELOAD="/usr/lib/libesddsp.so.0 /usr/lib/libesd.so.0
$LD_PRELOAD"
to
export LD_PRELOAD="/usr/lib/esound/libesddsp.so.0 /usr/lib/libesd.so.0
$LD_PRELOAD"
As I said, this was done in a test environment, but we will try it in a
large production environment soon.
Noel Torres
ejerciciosresueltos.com
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