https://bugs.kde.org/show_bug.cgi?id=381954
Bug ID: 381954
Summary: Desktop partially frozen when a Qt application shows a
progress dialog
Product: plasmashell
Version: 5.8.7
Platform: Mageia RPMs
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: k...@davidedmundson.co.uk
Reporter: yc.guille...@wanadoo.fr
CC: plasma-b...@kde.org
Target Milestone: 1.0
Created attachment 106430
--> https://bugs.kde.org/attachment.cgi?id=106430&action=edit
Source code of the progress-dialog example
The problem first arose while running Rosegarden and is related to using the
QProgressDialog widget.
The attached progress-dialog tiny program reproduced it.
>From plasma desktop:
- Start progress-dialog application:
A small window with a start button appears.
- Click the start button:
A message box "Wait four seconds..." with an OK button is shown.
- Wait about four seconds:
A Qprogress dialog "Opening file..." with a Cancel button pops up
(sometimes hidden under the first window) and the desktop freezes.
The digital and analog clocks are no more counting seconds and menus
are unusable.
Neither the OK nor the Cancel buttons are working.
- Moving a window is still possible:
A soon as a window has been moved, the desktop is no more frozen.
- Clicking on the OK or Cancel button freezes again the desktop.
- Clicking repeatedly the Cancel button does it works eventually.
There is no such problem when running the same application from some other
desktop session (I tried Gnome and IceWM).
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