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
