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Some remarks for the future of fallbackdm

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Johannes Leupolz 2026-01-08 21:21:17 +00:00
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docs/DESIGN.md
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@ -555,7 +555,7 @@ It runs only when **no other graphical session is active** on the seat and exist
* open a regular logind session **of class `greeter**`
* occupy the assigned VT
* let logind switch the VT to `KD_GRAPHICS` **and mute the keyboard handler**
* let logind switch the VT to `KD_GRAPHICS` and `K_OFF` **and mute the keyboard handler**
`fallbackdm` itself does **not** manipulate VTs, perform `KDSETMODE` ioctls, or access `/dev/tty` directly.
All VT and seat handling is delegated to `systemd-logind` **via a standard PAM session**.
@ -574,7 +574,7 @@ All VT and seat handling is delegated to `systemd-logind` **via a standard PAM s
* when the graphical session ends:
* `fallbackdm` may be restarted to reclaim the fallback role
`fallbackdm` is non-interactive by design but may display **minimal status information** in the future.
`fallbackdm` is non-interactive by design but may display **minimal status information** in the future. `fallbackdm` could also be extended to listen itself to the console switches from evdev devices that are actually connected to the seat and signal vuinputd to mute virtual devices accordingly.
### **Rationale**