Perhaps, there are issues reported as switch-over between monitors or graphical cards?
Sorry, no clues. Regards, Robert On Mon, Nov 9, 2015 at 5:45 PM, maitai <mai...@virtual-winds.org> wrote: > Thanks Robert for your reply, > > In fact I succeeded to reproduce partly the problem. I have a laptop with 2 > graphic cards, switchable. Whenever the PC goes in power-saving mode, it > switches to the intel one. When this happens, my menubar (regular QMenuBar) > is changing font and becomes ugly, and the only way to get it back to normal > is to restart the application. It seems to happen also from time to time if > I switch from external monitor to laptop monitor. > > This app is not using opengl, it's just a plain QWidget app. > > No signal or event as far as I can see is triggered when this happens, just > a paintEvent it seems. > > The funny thing is that even QtCreator is impacted by that... It also > changes font or style. > > Any clue on what is going on there? > > Thanks > Philippe Lelong > > > Le 09-11-2015 12:03, Robert Iakobashvili a écrit : >> >> On Mon, Nov 9, 2015 at 7:54 AM, maitai <mai...@virtual-winds.org> wrote: >>> >>> >>> Hello >>> >>> On Windows, some users are reporting that the application style (font? >>> palette?) is changing when laptop goes in energy saving mode, and becomes >>> more or less unreadable (white font on white background, etc). I have seen >>> that myself also a couple of times but I'm unable to reproduce it. >>> >>> When it occurs, putting the laptop back on power does not fix anything, >>> and the only way to get back the proper appearance is to restart the >>> application. If you start the application when in battery saving mode, no >>> problem. The application is widget-based (QMainWindow, QGraphicalScene, >>> QMenubar, etc), Qt is 5.5.1 but that was reported also with previous Qt >>> versions. >>> >>> As I said this occurs only for a few users, and I cannot reproduce it. >>> Maybe it's connected with the laptop changing GPU, I don't know. >>> >>> Does anyone knows what could possibly trigger this, and if I can catch it >>> somehow either to avoid it or reload style/palette/font/etc when it occurs? >>> >>> Thanks >>> Philippe Lelong >> >> >> >> Hi, >> >> With which options Qt was configured and built? >> >> Any plugins your software is using? >> >> Is it correlating with any particular Windows versions >> like on Windows-10 or 8.1? >> >> That sounds like an aggressive memory optimization by OS. >> Locking in memory sometimes could help against. >> >> There is a Qt signal >> >> QGuiApplication::on_applicationStateChanged(Qt::ApplicationState state); >> >> and using it on Android. >> >> Perhaps, coming to the state:Qt::ApplicationActive from >> somewhere else and reloading fonts, etc could be a work-around? >> >> Kind regards, >> Robert _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest