Bug 455251

Summary:	Junction's overlay window is sometimes drawn with excessive transparency, depending on how it's invoked
Product:	[Plasma] kwin	Reporter:	Chase Lau <arealperson1234+kde>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	5.24.5
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Improperly transparent window over a white background

Description Chase Lau 2022-06-14 13:47:29 UTC

Created attachment 149683 [details]
Improperly transparent window over a white background

SUMMARY
Posting a bug here from this github issue:
https://github.com/sonnyp/Junction/issues/70

Using an application called Junction, I'm seeing that windows are drawn with too much transparency. No effect I can enable/disable in desktop effects changes this.

The application window (Junction) does draw properly when launched from another flatpak application. 

STEPS TO REPRODUCE
1. `flatpak install junction`
2. Open junction by clicking on a web link (notice how hard it is to see the application).
3. Open junction by clicking a link in another flatpak application. Here you will see it completely opaque. 

SOFTWARE/OS VERSIONS

Operating System: Fedora Linux 36
KDE Plasma Version: 5.24.5
KDE Frameworks Version: 5.93.0
Qt Version: 5.15.3
Kernel Version: 5.17.13-300.fc36.x86_64 (64-bit)
Graphics Platform: X11
Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 2060/PCIe/SSE2 (Proprietary driver)

Comment 1 Nate Graham 2022-06-14 18:05:22 UTC

This doesn't happen in any other apps, does it?

How do you make Junction open a link from another app? The "Set Junction as default for web" button in the main window doesn't seem to be working for me.

Comment 2 Chase Lau 2022-06-14 21:23:13 UTC

I can't seem to make it happen with any other apps, no.

I set it as the default application by using System Settings > Applications > Default Applications.

I really don't know anything about how windows are drawn by kwin, but I'm very curious why these issues don't happen when Junction is called from another flatpak application.

Comment 3 Chase Lau 2022-06-14 22:15:05 UTC

Hi Nate,

Thanks for taking a look but I'm embarrassed to say this issue was caused by myself messing around with building the application. Nothing is wrong with KWin. Sorry to waste your time!