https://bugs.kde.org/show_bug.cgi?id=521662
Bug ID: 521662
Summary: krfb-virtualmonitor crashes with
"zkde_screencast_stream_unstable_v1 has no event 3"
after upgrade to KWin 6.7.0
Classification: Plasma
Product: kwin
Version First 6.7.0
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
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DESCRIPTION
After upgrading KWin from 6.6.4 to 6.7.0, krfb-virtualmonitor crashes
immediately with exit code 255. The issue is a Wayland protocol mismatch: KWin
6.7.0 sends event index 3 (serial) on the zkde_screencast_stream_unstable_v1
interface, but krfb's compiled-in protocol definition only knows events 0–2
(created, failed, closed), causing libwayland-client to abort.
Error message (stderr):
interface 'zkde_screencast_stream_unstable_v1' has no event 3
STEPS TO REPRODUCE
1. Run KWin 6.7.0 on a Wayland session (Plasma 6.7.0)
2. Run: krfb-virtualmonitor --resolution 1366x1024 --name "test" --password
"test" --port 5901
3. Observe immediate crash with exit code 255
OBSERVED RESULT
Process exits with code 255, no virtual output created
EXPECTED RESULT
Virtual output "test" appears in kscreen-doctor --outputs
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 44 kernel 7.0.12-201.fc44.x86_64, Wayland
session
KDE Plasma Version: 6.6.4
KDE Frameworks Version: 6.25.0
Qt Version: 6.10.2
Plasma version: 6.7.0
krfb 25.12.3 — crashes (same error)
krfb 26.04.2 — crashes (same error)
KWin 6.6.4-2 — both krfb versions work correctly
ADDITIONAL INFORMATION
Bisect: Confirmed regression between KWin 6.6.4 → 6.7.0. Downgrading KWin to
6.6.4-2 restores functionality immediately without any other changes.
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