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From: | Daniel J Sebald |
Subject: | Re: ***[Possible UCE]*** Re: GUI doesn't appear when using ./run-octave |
Date: | Sun, 16 Sep 2012 04:37:52 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16 |
On 09/16/2012 04:07 AM, Philip Nienhuis wrote:
marco atzeri-2 wroteOn 9/16/2012 1:05 AM, Philip Nienhuis wrote:The last days . /run-octave (with or without --force-gui) doesn't start the GUI but simply returns to the prompt.. octave --no-gui starts up the good old CLI. Just to be sure I wiped all source and build dirs and started anew with a fresh clone, with the same result. Where can I start searching for the cause? Linux Mageia 2, gcc 4.6.3, Pentium-M Philipeventually, same root cause of https://savannah.gnu.org/bugs/?37359 Now the error message at start is: QCoreApplication::sendPostedEvents: Cannot send posted events for objects in another thread and the GUI frozes and is not anymore usable. Kill -9 is needed to close the program.At least you do get error messages. On my (linux) box simply nothing happens (apart from a little spike in the CPU applet on some desktop panel) and nothing seems broken. It just won't work - kill -9 isn't even needed. The error message in your case seems related to one I posted a while ago "QObject::startTimer: timers cannot be started from another thread" (2X) here: https://mailman.cae.wisc.edu/pipermail/octave-maintainers/2012-August/029811.html (which in my case didn't hang the GUI - I just had to click in the terminal to get focus there, and then hit<Enter>) Maybe a red herring, but do you have win32/moc-QWinTerminalImpl.cc or unix/moc-QUnixTerminalImpl.cc in<BUILDDIR>/libgui/ libqterminal ?
I don't think it is a red herring. I've been searching around for a bug in which the GUIDE+O won't appear when the editor tab files are present in the configuration file, i.e., "savedSessionTabs=/home/sebald...". But I've isolated the problem to the QTerminal. That is, I put some fprintf's around the instruction that is failing:
// Octave Terminal subwindow. fprintf(stderr,"construct: before QTerminal\n"); _terminal = new QTerminal (this); fprintf(stderr,"construct: after QTerminal\n");All along I've noticed that the terminal doesn't work properly either. Text will appear but if switching between Qt windows, the text will stop, unless I move the position bar up and down back to the command line. Then text will appear.
That's where I am right now, and I will resume searching for the bug tomorrow.
Dan
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