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Re: [K12OSN] Tl_TeacherTool tribulations



That did not work, but I think the problem is that the screensavers for Gnome & IceWM don't work on the Mac--anyone having this problem?--and not because of any flaws in fl_tt. The KDE screensaver does work when I manually invoke it at the client; but I get the same error in fl_tt as with Gnome and IceWM when trying to invoke the screensaver on the Mac. Here's the error that appears in the terminal in which I called fl_tt:

xscreensaver: 11:52:14: running xscreensaver-gl-helper: Permission denied

##############################################################################

xscreensaver: 11:52:14: X Error!  PLEASE REPORT THIS BUG.
xscreensaver: 11:52:14: screen 0/0: 0x38, 0x0, 0x0

##############################################################################

X Error of failed request: BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  152 (RANDR)
  Minor opcode of failed request:  4 (RRSelectInput)
  Value in failed request:  0x100
  Serial number of failed request:  120
  Current serial number in output stream:  121

##############################################################################

    If at all possible, please re-run xscreensaver with the command
    line arguments `-sync -verbose -no-capture', and reproduce this
    bug.  That will cause xscreensaver to dump a `core' file to the
    current directory.  Please include the stack trace from that core
    file in your bug report.  *DO NOT* mail the core file itself!
    That won't work.

    http://www.jwz.org/xscreensaver/bugs.html explains how to create
    the most useful bug reports, and how to examine core files.

    The more information you can provide, the better.  But please
    report this bug, regardless!

##############################################################################

xscreensaver-command: no screensaver is running on display ws253.ltsp:0.0


Hope this feedback is useful.

Petre

Robert Arkiletian wrote:
On 12/30/05, Petre Scheie <petre maltzen net> wrote:

FYI, the Lock/Launch screensaver button didn't work with the one Mac client I tested it
with.  I haven't tried it with any PC clients yet.


Try typing this at the mac client.

$'xscreensaver -no-splash &
$xscreensaver-command -lock &

Let me know if this works.


Any chance Chuck's X11VNC stuff, as described at
http://wiki.ltsp.org/twiki/bin/view/Ltsp/WorkInProgress#x11vnc
can be incorporated in a future release?  The VNCReflector gives us the inverse, of
pushing a window out for all users to see.  But being able to see what's on a given
client's screen would be really useful, too.


I agree this would be a cool feature. I thought about adding this
before 0.2. But I was hesitant because it means modifying/playing
around with the default k12ltsp setup (considering all clients have to
run a type of vnc server ( x11vnc) and also enable some local app
support and editing lts.conf ). I'll take a closer look at this but I
still feel broadcasting is more useful than monitoring/taking control.
Now that I got rid of the xhost issue, installing fl_tt does not
modify a standard k12ltsp setup. The only optional modification is if
you want non superusers (say teachers) to run fl_tt by adding a
specific group to sudo.
--
Robert Arkiletian
C++ GUI tutorial http://fltk.org/links.php?V19

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