Hi,
I’m not new to QT, I wrote some small apps with it several years ago, and have just come back to it. My issue here is that 5.0.2 is the last version where anything at all works, in 5.1.0 and later nothing does. I mean when I run the the app, no window appears, no error messages, just nothing. In 5.0.2 everything just works normally. This behaviour happens with everything from the smallest analogclock demo to the assistant & designer apps.
A GDB backtrace shows this:
(gdb) bt
#0 0×00007ffff616a9dd in poll () from /lib64/libc.so.6
#1 0×00007ffff4ff7f04 in ?? () from /usr/lib64/libglib-2.0.so.0
#2 0×00007ffff4ff8024 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3 0×00007ffff739be54 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/Qt5.1.0/5.1.0/gcc_64/lib/libQt5Core.so.5
#4 0×00007ffff735082b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/Qt5.1.0/5.1.0/gcc_64/lib/libQt5Core.so.5
#5 0×00007ffff73548f0 in QCoreApplication::exec() () from /opt/Qt5.1.0/5.1.0/gcc_64/lib/libQt5Core.so.5
#6 0×0000000000402e00 in main ()
but that’s basically identical to a backtrace from 5.0.2 which has displayed the window. I’ve also tried stracing it, but the strace shows it running, reading and writing data to X Windows, same as in 5.0.2.
Anyone seen this issue before, or have any advice about how to troubleshoot it further?
Thanks,
ldarby
↧