It seems I have found a reproducable way of producing this effect (at least very often). Simply start the Qt Demo application (the application from where all demos can be launched). Then quit. Then from this moment, all Qt application will be slow to start. So it seems the Demo app puts the system in a special state. This was tested today on a 3rd computer. All have Win7-64, and different hardware.
Login off / on solves this problem. I know "slowing" effect has also happened to me in the past without the demo application started. I will try the patch sometime later. Philippe On Tue, 25 May 2010 15:28:30 +0200 Denis Dzyubenko <[email protected]> wrote: > Hi Philippe, > > On 23 May 2010 14:43, Philippe <[email protected]> wrote: > > I have found where this happens: > > in qapplication_win.cpp > > in QApplicationPrivate::initializeMultitouch_sys() > > > > This calls takes up to 10 seconds: > > iInkTablets->get_Count(&count); > > > After a while, Qt applications (demo, assistant, linguist... from the > > pre-built commercial package) take a long while to open > > how long does it take for you reproduce it? how long is a "while"? > > Does it hang for a long time on get_Count() call only? > > We've been discussing this issue on irc.freenode.net #qt-labs and so > far the only idea is that CoInitialize(NULL) call is missing. Could > you try to apply the following patch to your Qt and try again? > http://pastebin.com/7sxAMjSC > > -- > Best regards, > Denis. _______________________________________________ Qt4-preview-feedback mailing list [email protected] http://lists.trolltech.com/mailman/listinfo/qt4-preview-feedback
