Bug 471062

Summary:	Wayland / Virtualbox: return from VBox saved state, UI goes black
Product:	[Applications] kdevelop	Reporter:	Lassi Väätämöinen <lassi.vaatamoinen>
Component:	UI: general	Assignee:	kdevelop-bugs-null
Status:	REPORTED ---
Severity:	normal
Priority:	NOR
Version First Reported In:	5.11.230401
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Lassi Väätämöinen 2023-06-15 06:05:43 UTC

SUMMARY
The contents of the window goes black, when moving the mouse cursor into the KDevelop window. Happens after returing VirtualBox saved state, and Plasma Wayland session used.


STEPS TO REPRODUCE
1. Start Virtualbox and login to KDE, Plasma Wayland session selected
2. Start Kdevelop with some projects
3.  Exit Virtualbox KDE Neon guest with "Save the machine state"
4. Start Virtualbox KDE Neon, restored saved state
5. Move mouse into the KDevelop window

OBSERVED RESULT
UI goes black, but KWin borders stay normal. So the window just contains a black rectangle. Ctrl+tab shortcut brings up "switch file" popup, so th UI underneath is responsive. 

Kdevelop needs to be restarted to bring the UI visible(?)

EXPECTED RESULT
UI is displayed normal, as it was at step 3. 

SOFTWARE/OS VERSIONS
Operating System: KDE neon 5.27
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9
Kernel Version: 5.19.0-43-generic (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i7-7820HQ CPU @ 2.90GHz
Memory: 22,7 GiB of RAM
Graphics Processor: SVGA3D; build: RELEASE; LLVM;
Manufacturer: innotek GmbH
Product Name: VirtualBox
System Version: 1.2

ADDITIONAL INFORMATION
Does not happen with Kate, for example. The Kate UI stays visible as normal.