Bug 505794

Summary:	VLC + Wayland + KWin: Missing window decorations
Product:	[Plasma] kwin	Reporter:	Rafael Linux User <rafael.linux.user>
Component:	decorations	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	nate, rafael.linux.user
Priority:	NOR
Version First Reported In:	6.3.5
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Rafael Linux User 2025-06-19 16:23:40 UTC

Here’s a properly formatted bug report for **bugs.kde.org** based on your issue with VLC on KDE Plasma (Wayland):  

---  

### **SUMMARY**  
VLC (v3.0.21) launches in fullscreen mode by default on KDE Plasma (Wayland), missing window decorations (title bar, minimize/maximize/close buttons). Forcing XWayland (`QT_QPA_PLATFORM=xcb`) or adjusting VLC settings does not resolve the issue.  

### **STEPS TO REPRODUCE**  
1. Launch VLC on KDE Plasma (Wayland session).  
2. Observe: Window opens in fullscreen with no decorations (cannot minimize/resize/close via standard controls).  
3. Attempted fixes (none worked):  
   - Launching with `QT_QPA_PLATFORM=xcb`.  
   - Disabling "Start in fullscreen" in VLC settings.  
   - Changing video output to "X11 (XCB)" in VLC.  
   - Creating KWin window rules to enforce decorations.  

### **OBSERVED RESULT**  
- VLC ignores KDE’s window management rules under Wayland.  
- No title bar or window controls are visible, even when explicitly disabled in fullscreen settings.  

### **EXPECTED RESULT**  
- VLC should respect KDE’s window decorations and open in a resizable window with standard controls (minimize/maximize/close).  

### **SOFTWARE/OS VERSIONS**  
- **Linux/KDE Plasma**: openSUSE Tumbleweed 20250606  
- **KDE Plasma Version**: 6.3.5  
- **KDE Frameworks Version**: 6.14.0  
- **Qt Version**: 6.9.1  
- **Kernel Version**: 6.15.0-1-default (64-bit)  
- **Graphics Platform**: Wayland  
- **VLC Version**: 3.0.21  

### **ADDITIONAL INFORMATION**  
- **Workarounds attempted**:  
  - Running under X11 session works (window decorations appear).  
  - Other Qt/GTK apps (e.g., MPV, QMPlay2) handle Wayland decorations correctly.  
- **Relevant logs**:  
  - No crashes occur (no backtrace needed).

Comment 1 Bug Janitor Service 2025-06-19 16:33:39 UTC Comment hidden (spam)

Thank you for the bug report!

However Plasma 5.27.5 is no longer eligible for support or maintenance from KDE; supported versions are 5.27. (LTS), and 6.3 (non-LTS) or newer. Please upgrade to a supported version as soon as your distribution makes it available to you. Plasma is a fast-moving project, and bugs in one version are often fixed in the next one.

If you need support for Plasma 5.27.5, please contact your distribution, who bears the responsibility of providing support for older releases that are no longer supported by KDE.

If you can reproduce the issue after upgrading to a supported version, feel free to re-open this bug report.

Comment 2 Rafael Linux User 2025-06-20 12:22:52 UTC Comment hidden (spam)

I'm sorry, I do not changed version in form, but I wrote correct one in this bug content. According to your reply, I fixed version in form field too.

Comment 3 Nate Graham 2025-06-20 15:10:40 UTC

Is this VLC from system packaging, Flatpak, Snap, or somewhere else?

Does the issue happen in a new clean user account on the same computer?

Comment 4 Rafael Linux User 2025-06-22 19:43:36 UTC

(In reply to Nate Graham from comment #3)
> Is this VLC from system packaging, Flatpak, Snap, or somewhere else?
> 
> Does the issue happen in a new clean user account on the same computer?

VLC installed from openSUSE repos.
I checked it creating a new user. As you supposed, there is not that issue in that user account. 
What's next, please?

Comment 5 Nate Graham 2025-06-25 20:53:47 UTC

Then there's some issue in your normal user account. Can you troubleshoot a bit and see if you can figure out what it is? Window rules and 3rd-party window decoration themes spring to mind as potential causes.

Comment 6 Rafael Linux User 2025-06-26 08:37:40 UTC

I tried in another Tumbleweed (up to date too) with same desktop configuration (Plasma + Wayland) but  distinct graphic card (1st one is AMD second one is NVIDIA) and windows decoration. In this PC,  VLC window  is showed correctly. So I will check if changing windows decoration in my AMD is the issue.

Anyway, I would like to try to delete any config file of VLC first. Where is it located in Linux version installed from repositories?

Thanks

Comment 7 Rafael Linux User 2025-06-26 11:45:38 UTC

I'm sorry, I better ask for config file deletiion at VLC forum, thanks.

Comment 8 Rafael Linux User 2025-06-26 22:29:41 UTC

Fixed
I changed window decoration, but that didn't fixed issue.
Then, I followed next steps (maybe first one not neccesary):
1 - Uninstalled all VLC packages
2 - Removed VLC config folders with rm  -rf  ~/.local/share/vlc ~/.config/vlc
3 - Installed VLC packages again

and now issue is solved.

Thank you very much Nate!!! You gave me the clues to figure it out.