Hi Gustavo,

Thanks for the update. I am glad that you were able to switch window
managers as a workaround.

I added an entry to our Squeak bug tracker so we will not lose sight of
the problem:

  http://bugs.squeak.org/view.php?id=7812

Dave

On Thu, Mar 20, 2014 at 11:12:30AM -0300, Gustavo Duarte wrote:
> 
> Hi David,
> 
> I applied the change set with Scratch, and the problem remains, it is 
> strange right ?
> 
> Any way, as workaround we are going to change the Window Manager from 
> Compiz to Metacity on these machines. Using Metacity as Window Manager 
> this problem is resolved.
> 
> Thanks a lot for your workaround, and I agree with you that the 
> definitve solution should be done on Squeak-vm.
> 
> 
> Regards,
> 
> Gustavo.
> 
> On 03/20/2014 12:27 AM, David T. Lewis wrote:
> >
> >
> >
> >
> >Hi Gustavo,
> >
> >The problem with full screen on/off looks like it may be caused by
> >the X11 window manager in Ubuntu, and I do not know how long it may
> >take to resolve this in the Squeak VM or in Ubuntu. I see from your
> >explanation here that the problem may be affecting children in the
> >Plan Ceibal project already, so it would be good to find a solution
> >soon.
> >
> >I think that I have found a workaround for the problem that may help.
> >I am attaching a change set that you can file in to a Squeak image,
> >either the Squeak 3.9 image that you mentioned, or any other recent
> >Squeak 4.5 image. This change uses one of the plugins in the squeak-vm
> >package on Ubuntu, and it will force a reconnection to the X11 display
> >after the Squeak window returns from full screen mode.
> >
> >Can you please try loading this change set into Squeak, and testing
> >it on an MG3 laptop with Ubuntu 12.04?
> >
> >I have not tested this yet with Scratch, but if it works on Squeak
> >with Ubuntu 12.04, then it will probably work with Scratch also.
> >
> >This is not a real solution to the problem, but if it works on the
> >laptops for Plan Ciebal then maybe it will help until we are able to
> >fix the real problem.
> >
> >Thanks,
> >
> >Dave
> >
> >
> >On Mon, Mar 17, 2014 at 06:11:44PM -0300, Gustavo Duarte wrote:
> >>Hi,
> >>
> >>Overview
> >>========
> >>
> >>I would like make a brief overview of the situation.
> >>
> >>In my case, this problem is happening on laptos Magalahes model MG3,
> >>these kind of the machines are manufactured by a Portuguese company,
> >>http://www.jp-ik.com/, focuses on provide laptop for children.
> >>
> >>Here in Uruguay there is a country wide Educational Project, called
> >>"Plan Ceibal"[1] [2]. Thousand of these machines were distributed to
> >>children on the schools around all the country.
> >>
> >>Until last year 2013, this machines comes with Ubnutu 10.04 installed
> >>and Squeak was working like a charm.
> >>
> >>Currently a migration to Ubuntu 12.04 is on deployment stage, and some
> >>of the remaining issues is this (Squeak).
> >>
> >>More info about the HW of this Machine [3]
> >>
> >>
> >>Research results so far:
> >>==========================
> >>
> >>I tried get more information, calling fullScreenON and Off from
> >>Worksapce unsessfully, same behavior happened, but no additional data
> >>were printed out.
> >>
> >>
> >>Now, I will take the another approach, related with a comment did by Tim
> >>Rowledge on the old thread.
> >>
> >><<
> >>"I?d say that strongly suggests a problem in the code setting the screen
> >>mode; you?ll find it (for unix) in platforms/unix/vm-display-
> >>X11/sqUnixX11.c at the function  display_ioSetFullScreen(sqInt
> >>fullScreen). Since it works on many unices and has for a long time I
> >>imagine it means some problem with the specific machine?s display driver
> >>code. That could be all sorts of fun to solve. At the very least you?ll
> >>need to find an X expert, which is not me."
> >>>>
> >>
> >>
> >>Taking in account, i have never developed on Squeak, my plan would be 
> >>like:
> >>
> >>1) Add debugging cide like "printf" to sqUnix11.c to may debug, and
> >>check if there where the problem
> >>
> >>2) Compile Squeak - VM from sourece code, modified.
> >>
> >>3) Run Squeak vm with clean Squeak image.
> >>
> >>4) See the output of debugging code.
> >>
> >>5) With these new clues, i'll ask help to a X expert.
> >>
> >>What do you think, that sounds reasonable ?
> >>
> >>Is another easier approach ?
> >>
> >>Thanks in advance.
> >>
> >>
> >>Gustavo.
> >>
> >>
> >>[1] http://www.ceibal.edu.uy
> >>[2] http://en.wikipedia.org/wiki/Ceibal_project
> >>[3]
> >>http://www.ceibal.edu.uy/art%C3%ADculo/noticias/consultas/hardwaremagallanes3
> >>
> >>
> >>On 03/17/2014 01:58 PM, gettimothy wrote:
> >>>No Eeks!, flurps, oopsies, fscks or oy's here.
> >>>
> >>>Full screen works just dandy with dual monitors.
> >>>Platform is a workstation, NVidia GEForce, Slackware Linux.
> >>>
> >>>Image
> >>>-----
> >>>
> >>>Squeak4.5
> >>>latest update: #13680
> >>>Current Change Set: dude
> >>>Image format 6505 (32 bit)
> >>>
> >>>Virtual Machine
> >>>---------------
> >>>/home/wm/usr/bin/coglinux/lib/squeak/4.0-2749/squeak
> >>>Croquet Closure Cog VM [CoInterpreter VMMaker.oscog-eem.302]
> >>>Unix built on Jul 15 2013 15:49:06 Compiler: 4.1.2 20080704 (Red Hat
> >>>4.1.2-48)
> >>>platform sources revision VM: r2749
> >>>http://www.squeakvm.org/svn/squeak/branches/Cog Plugins: r2545
> >>>http://squeakvm.org/svn/squeak/trunk/platforms/Cross/plugins
> >>>CoInterpreter VMMaker.oscog-eem.302 uuid:
> >>>2ac39432-ac54-4584-964e-b129c90792f4 Jul 15 2013
> >>>StackToRegisterMappingCogit VMMaker.oscog-eem.302 uuid:
> >>>2ac39432-ac54-4584-964e-b129c90792f4 Jul 15 2013
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>