KDE Plasma Wayland instability on Arch Linux triggered by NVIDIA Open driver failures

[Alberto Salvia Novella]

It's a known bug.

That's why on Zenned we are still using the previous version.

On Mon, Apr 6, 2026 at 5:50 PM ION GROUP <ion.group.connect at gmail.com>
wrote:

> Dear Plasma Developers,
>
> I am writing on behalf of JSC "IIT ION GROUP".
>
> First of all, thank you for your work on KDE Plasma and KWin. We truly
> appreciate the quality of the KDE desktop and the effort behind its ongoing
> development.
>
> We are reporting a serious issue affecting KDE Plasma on Wayland on one of
> our Arch Linux laptops. The system intermittently reaches a black screen
> with a blinking underscore during graphical startup, and once the session
> does start, Plasma and KWin may still experience instability or temporary
> hangs.
>
> At the same time, the kernel repeatedly reports NVIDIA GSP-related
> failures:
>
>    - NVRM: _kgspIsHeartbeatTimedOut: Heartbeat timed out
>    - NVRM: _kgspRpcRecvPoll: GSP RM heartbeat timed out
>
> Additional related graphics messages include:
>
>    - WARNING: GPU:0: Unable to read EDID for display device DP-2
>    - nvidia 0000:01:00.0: [drm] Cannot find any crtc or sizes
>
> Environment summary:
>
>    - Arch Linux
>    - Kernel: 6.19.10-arch1-1
>    - KDE Plasma 6.6.3
>    - KWin Wayland
>    - SDDM 0.21.0-6
>    - NVIDIA GeForce RTX 4070 Laptop GPU
>    - NVIDIA Open Kernel Module path
>
> At the moment, we suspect that the primary cause may be located in the
> NVIDIA open driver / GSP path rather than in Plasma itself. However,
> because Plasma and KWin are visibly affected, we wanted to provide a proper
> report in case there is also a KDE-side workaround, mitigation, or known
> interaction that should be tracked.
>
> We are attaching our collected logs for review.
>
> We value your work very highly, and we would greatly appreciate it if this
> issue could be reviewed as soon as possible.
>
> Thank you for your time and for all your work on KDE.
>
> Sincerely,
> JSC IIT "ION GROUP"
>
>
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