KWin compositor crashes on scrcpy launch

[LER0ever]

On Plasma Desktop, compositor crashes on every scrcpy launch and recovers after scrcpy exits.

Actual Behavior

Desktop effects and transparency not working, i.e. compositor exits or crashes.

Environment

Desktop: KDE Plasma 5.12
Kernel: 4.16.0
Graphics: NVIDIA 390
Distro: Manjaro Linux

[rom1v]

Thank you for the report.

Are there any logs in the terminal when it crashes?

Some possibly related links:

• https://www.mail-archive.com/kde-bugs-dist@kde.org/msg88598.html
• https://www.mail-archive.com/kde-bugs-dist@kde.org/msg88606.html
• https://bugs.kde.org/show_bug.cgi?id=382485
• https://devtalk.nvidia.com/default/topic/1025735/kde-compositing-crash-on-nvidia-drivers-384-90-/

[LER0ever]

While there is nothing in stdout, there is a bunch of QPainter errors that may or may not be related to this. I've uploaded the journalctl -f output here

Also, I found that after the compositor recovers (that is after I Ctrl-C'ed the scrcpy), although the transparency and visual effects are back, I cannot take Window screenshot (full screenshot is fine), KWin crashes along with the compositor after I request the screenshot of my terminal window.

[LER0ever]

Ahh, sorry I did not read your links before replying... The issue is indeed due to SDL blocking the compositor, and I manage to work around this using KDE Window Rules (Preventing scrcpy from blocking compositors)

---

Attaching the Window Rule config in case someone also need a temporary fix on this problem.

[rom1v]

Thank you for the workaround. 👍 I added an entry in the FAQ.

[Dakai]

@LER0ever Thank you! It works like a charm.

[rom1v]

Does #522 fix the initial issue, or is it unrelated?