[K12OSN] RDP Client

[Gideon Romm]

Hi, guys.  I just wanted to chime in on a few points, in case they are
of any use.

1.  The whole trick of using a dummy sound daemon is really to *make
sure* that "esd" running on the client does not take control and keep
control over /dev/dsp.  In update4 to LTSP (which may or may not have
been folded into k12LTSP), I added the "-as 1" flag to esd in the
rc.sound file, so that every 1 second, the daemon releases its control
over the sound device.  In theory (since I have not thoroughly tested
it), this should mean that even if esd is running, /dev/dsp will not be
usurped by the daemon, so sound from rdesktop would work (ie without
SOUND_DAEMON=rdp).  If someone wants to test the theory, it might save
some headaches with symlinks and such.  Be sure to check the line in
rc.sound for esd to see if it has that "-as 1" flag:  
grep esd /opt/ltsp/i386/etc/rc.sound

2.  If you want Linux sound *and* Windows sound, I have had some limited
testing success with launching rdesktop from the Linux server wrapped in
esddsp:  esddsp rdesktop .....
I don't know how well this works with lots of simultaneous users, but it
tested ok for limited use.

3.  Another thing I did in LTSP update 4 was to neuter "esd"'s locking
mechanisms, which were preventing second users of a single terminal to
get sound.  So, I believe, if that has been folded into K12LTSP, flags
like "-public" to esd have been rendered superfluous.

Just food for thought,

-Gadi

On Wed, 2006-09-13 at 14:15 -0400, Steven Santos wrote:
> ...I wonder if this functionality could be added to fl_teachertool...
> 
> ----------------------------------------------------------------------
> Steven Santos
> Director, Simply Circus, Inc.
> Email: Steven at SimplyCircus.com
>  Mail: PO BOX 620753
>        Newton, MA 02462
> Phone: 781-799-4938
>  eFax: 309-214-0899
>   Web: www.SimplyCircus.com
> 
> > -----Original Message-----
> > From: k12osn-bounces at redhat.com [mailto:k12osn-bounces at redhat.com]On
> > Behalf Of David Trask
> > Sent: Wednesday, September 13, 2006 11:46 AM
> > To: Support list for open source software in schools.
> > Cc: Support list for open source software in schools.
> > Subject: Re: [K12OSN] RDP Client
> >
> >
> > "Support list for open source software in schools." <k12osn at redhat.com>
> > writes:
> > >That worked like a charm. It isn't the end of the world to have to edit
> > >that since I have my lab on it's own server. So on test days I will just
> > >make the switch in lts.conf and they will boot right to the terminal
> > >server screen. That works. This is a big weight off my shoulders. Thanks
> > >to everyone. This list rocks.
> >
> > Actually Tim....since it only affects the terminals at boot time....what I
> > did was make 2 lts.conf files....one called lts.conf.linux and one called
> > lts.conf.windows.....then I make a symlink called lts.conf and wrote a
> > little script that I could use with a launcher on my desktop to redo the
> > symlink....in other words....if I wanted Windows sound....I click the
> > Windows Sound Launcher and it simply changed the symlink to point to
> > lts.conf.windows.....when I wanted Linux sound.....(you get the idea).
> > The nice thing is....if a terminal boots while the lts.conf is point to
> > linux sound....it will have linux sound until reboot....whereas the same
> > is true for Windows sound...so you can have your cake and eat it too
> > during the testing provided the folks who need linux sound don't reboot
> > their terminals
> >
> > David N. Trask
> > Technology Teacher/Director
> > Vassalboro Community School
> > dtrask at vcsvikings.org
> > (207)923-3100
> >
> >
> > _______________________________________________
> > K12OSN mailing list
> > K12OSN at redhat.com
> > https://www.redhat.com/mailman/listinfo/k12osn
> > For more info see <http://www.k12os.org>
> >
> >
> 
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> 
> 
-- 
--------------------------------------------------------
Gideon Romm | Proud LTSP Developer
ltsp at symbio-technologies.com

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