Selected style changed when returning from sleep

[kragnfrol]

Hi everyone,

I recently migrated my Qt app from Qt 4.8.4 to Qt 5.5, and I have some resiliant bug I need to fix.

If i run the app, put the computer to sleep and then get back to the app, I may have some issue with the style :

• most of the widgets are ok
• some widgets are display with the default style.
• every newly opened widgets are opened with the default style
• selecting another style is correctly applied to the whole application.

I do not get this behaviour every time, it's more like 1 on 5 try.

I'm exclusively running my app on Windows 7, 64bits.

I'm also a bit new to Qt so I'm totally lost. I don't know what to try, what to search, and what informations may be needed here to get some help.

Thanks for any tips or hints !

Regards,

Valerian

[SGaist]

Hi and welcome to devnet,

To be sure I understand you correctly: these bugs are only there since you moved your application to Qt 5 ?

[kragnfrol]

@SGaist Hi, thanks !

Yes no one ever experienced this problem before the Qt 5 migration.

[SGaist]

What does your application do ? Anything OpenGL related ?

Can you create a small sample application that shows that behavior ?

[kshegunov]

@kragnfrol
See also QTBUG-52728, it's probably related. It's supposed to be fixed in Qt 5.6.2.

Kind regards.