Bug 495353

Summary:	Out-of-process screencasting is broken with today's git master due to pipewire dependency version bump
Product:	[Plasma] kwin	Reporter:	Nate Graham <nate>
Component:	screencasting	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED INTENTIONAL
Severity:	normal	CC:	isma.af, kde
Priority:	NOR	Keywords:	regression
Version First Reported In:	master
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Nate Graham 2024-10-25 17:34:22 UTC

Symptoms:
- Hovering over Task Manager Tasks shows a popup with no window thumbnail; after a moment, the placeholder app icon appears
- Meta+R to record the screen fails with the error message "An error occurred while attempting to record the screen. KWin Screencasting is not available."

Window thumbnails in Overview work, I guess because it's in-process?

Comment 1 Ismael Asensio 2024-10-26 09:03:13 UTC

I cannot reproduce it with Plasma's and Qt's master as of a few hours ago

Operating System: Kubuntu 24.10
KDE Plasma Version: 6.2.80
KDE Frameworks Version: 6.8.0
Qt Version: 6.8.1 (master 6.8 branch)
Kernel Version: 6.11.0-8-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 15.3 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620

Comment 2 Nate Graham 2024-10-26 14:06:45 UTC

I'm reproducing it now on another machine running git master, notably also with Qt 6.7.2

Notably, on my KDE Linux machines which build from master but have Qt 6.8, I don't see it. Perhaps it's an issue that only affects Qt 6.7?

Comment 3 David Edmundson 2024-10-27 18:31:05 UTC

Can you read the cmake output.

You should *not* get:

-- The following features have been disabled:

 * PipeWire, Required for Wayland screencasting

Updating to Fedora 41 and it should work again

Comment 4 Nate Graham 2024-10-28 15:03:10 UTC

Yep.