Re: Unexpected visual effect under GNOME Shell

[Olivier Fourdan <ofourdan redhat com>]

Hi Sergey,

On Thu, Feb 8, 2018 at 2:18 PM, Sergey Dubov <sergey dubov oracle com> wrote:

I can say for sure Qt::FrameLessWindowHint is not override redirect Qt flag on X11.

Such windows are pretty much manageable by various WMs, accepts activation, keyboard and mouse input (and produces other issues because of that sometimes 😝).

Qt has another flag for “override redirect” feature, it’s Qt::BypassWindowManagerHint (or similar X11 attribute Qt::X11BypassWindowManagerHint), we do not use them.

Fair enough :) 

 We observe that issues with so far just one WM, so suspect this WM just handles frameless windows that funny way.

Yes, I am not saying this is not an issue in mutter, I am just trying to determine if this is the same as bug 767212.

 

That’s also curious that you found the workaround (avoid making window frameless) but we still would like to know whether it’s possible to have this resolved keeping window frameless exactly.

I think this is a different issue from bug 767212, so IMHO best would be to file a new issue in https://gitlab.gnome.org/GNOME/mutter and post the existing reproducer you guys provided in bug 767212.

Cheers,

Olivier