How should Wayland compositors handle logind restarts?

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Hi,

Currently, a lot of Wayland compositors can't recover from logind restarts. For example, that's the case with weston, sway, kwin, and perhaps other compositors.

The culprit seems to be that atomic commits fail with the "Permission denied" error.

My question is - should Wayland compositors handle logind restarts in any way?

At the moment, many Wayland compositors don't take any precautions against the case where logind is restarted. They assume that the DRM file descriptors will remain valid and the session will be restored auto-magically.

Cheers,
Vlad
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