[systemd-devel] How should Wayland compositors handle logind restarts?

[Vlad Zahorodnii]

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