Re: Cannot run Qt5 applications.

[Jon TURNEY <jon dot turney at dronecode dot org dot uk>]

On 05/02/2015 01:40, Jon TURNEY wrote:
> On 04/02/2015 23:20, David Stacey wrote:
> > I'm having difficulty running any Qt5 application. These are the
> > commands I'm issuing:
> >
> >      XWin -multiwindow &
> >      export DISPLAY=:0.0
> >      xclock &
> >
> > and I see the clock, so X is up and running. Then:
> >
> >      /usr/lib/qt5/examples/gui/analogclock/analogclock
> >      QXcbConnection: XCB error: 145 (Unknown), sequence: 162, resource
> > id: 0, major c
> >      ode: 140 (Unknown), minor code: 20
> >      Bad system call (core dumped)
>
> Possibly you need to install and start cygserver (See [1])
>
> If so, this is because Qt5 is assuming shared memory is available, which
> could possibly be handled in a better way...
>
> [1]  http://x.cygwin.com/docs/ug/using-shared-memory.html

Yaakov,

This looks like a portability problem in Qt5, where it only handles 
shmget() failing with a return value of -1, not with SIGSYS, to fallback 
to using an image in unshared memory.

Patch attached.

--
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

Attachment: qt5-shm.patch
Description: Text document

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://x.cygwin.com/docs/
FAQ:                   http://x.cygwin.com/docs/faq/