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feat(host/gamescope): managed-default Gaming with debounced TV-restore

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Feature A: in Gaming Mode, default to a host-managed gamescope at the CLIENT's
mode (tear the TV's autologin down on connect) instead of attaching to the
running TV session — so the client receives ITS resolution (capture == encode ==
client mode, fixing the InitializeEncoder size mismatch the attach path hit),
not the TV's 4K.

Reliability is the debounce: restore_managed_session() now SCHEDULES the TV
restore RESTORE_DEBOUNCE (5s) after the last disconnect via a host-lifetime
worker, instead of restoring immediately per-disconnect. A reconnect inside the
window cancels the pending restore and reuses the still-warm managed session
(create_managed_session clears PENDING_RESTORE at the top) — so a quick reconnect
(e.g. a controller hiccup) never triggers a gamescope stop/relaunch, which is the
per-connect churn that leaked NVIDIA GPU context on F44 (the black-screen
reconnect).

- vdisplay/gamescope.rs: PENDING_RESTORE + RESTORE_DEBOUNCE; schedule_restore_tv_session
  (debounced), do_restore_tv_session (the actual restore, worker-driven),
  start_restore_worker (100ms tick, RAII keepalive handle). create_managed_session
  cancels the pending restore + reuse path unchanged.
- vdisplay.rs: apply_input_env flips gamescope to managed-DEFAULT; PUNKTFUNK_GAMESCOPE_ATTACH
  (or an explicit _NODE) opts back to attach for couch-on-TV; _MANAGED forces managed.
  restore_managed_session schedules; new start_restore_worker wrapper.
- m3.rs serve(): hold the restore worker for the host lifetime.
- bazzite host.env: document managed-default + the ATTACH opt-out.

Compiles, clippy-clean, 78 host tests pass. F44 single stop/start leak to be
verified live on the box.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Enrico Bühler
2026-06-14 22:34:33 +00:00
parent 66c2bee183
commit c25706b355
4 changed files with 123 additions and 29 deletions
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packaging/bazzite/host.env
+7 -4
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@@ -19,7 +19,10 @@ PUNKTFUNK_ZEROCOPY=1
# Force a specific backend for testing (skips auto-detect + env retargeting):
# PUNKTFUNK_COMPOSITOR=kwin|mutter|wlroots|gamescope
# PUNKTFUNK_INPUT_BACKEND=libei|wlr|gamescope|uinput
# Opt into the host-MANAGED gamescope session (spawns gamescope-session-plus at the client mode,
# stops the autologin gaming session for the duration) instead of attaching to the running one:
# PUNKTFUNK_GAMESCOPE_MANAGED=1
# PUNKTFUNK_GAMESCOPE_APP=steam -gamepadui
#
# In Gaming Mode the host MANAGES a gamescope-session-plus at the CLIENT's resolution by default
# (tears the TV's autologin down on connect; restores it on a debounced idle, reused on a quick
# reconnect). To instead ATTACH to the running TV session at its own mode (couch-on-TV — gaming
# stays live on the panel, no Steam restart), set:
# PUNKTFUNK_GAMESCOPE_ATTACH=1
# PUNKTFUNK_GAMESCOPE_APP=steam -gamepadui # only for an ad-hoc bare-spawn fallback