Fixed issues with gamescope not properly launching.

install.sh

@@ -162,6 +162,7 @@ if [[ ! -d "${SOURCE_ROOT}/ptlinux" \
 	|| ! -f "${SOURCE_ROOT}/ptlinux/native/gamescope-wayland-live-resize.patch" \
 	|| ! -f "${SOURCE_ROOT}/ptlinux/native/gamescope-wayland-letterbox-backing.patch" \
 	|| ! -f "${SOURCE_ROOT}/ptlinux/native/gamescope-wayland-libdecor-input-scope.patch" \
+	|| ! -f "${SOURCE_ROOT}/ptlinux/native/gamescope-keep-nested-windows-visible.patch" \
 	|| ! -f "${SOURCE_ROOT}/packaging/eu.pristontale.PTLinux.desktop" \
 	|| ! -f "${SOURCE_ROOT}/packaging/eu.pristontale.PTLinux.png" \
 	|| ! -f "${SOURCE_ROOT}/packaging/pristontale-eu" \
@@ -254,6 +255,7 @@ install -m 0644 \
 	"${SOURCE_ROOT}/ptlinux/native/gamescope-wayland-live-resize.patch" \
 	"${SOURCE_ROOT}/ptlinux/native/gamescope-wayland-letterbox-backing.patch" \
 	"${SOURCE_ROOT}/ptlinux/native/gamescope-wayland-libdecor-input-scope.patch" \
+	"${SOURCE_ROOT}/ptlinux/native/gamescope-keep-nested-windows-visible.patch" \
 	"${STAGING_RELEASE}/ptlinux/native/"
 install -m 0644 "${SOURCE_ROOT}/ptdiag/__init__.py" "${STAGING_RELEASE}/ptdiag/__init__.py"
 install -m 0644 "${SOURCE_ROOT}/ptdiag/assbin.py" "${STAGING_RELEASE}/ptdiag/assbin.py"

ptlinux/cli.py

@@ -50,7 +50,12 @@ from .launcher import (
 	launch_official_updater,
 	prepare_launcher_binary,
 )
-from .locking import LauncherPlayLease, launcher_operation_lock, launcher_play_lock
+from .locking import (
+	LauncherPlayLease,
+	launcher_operation_lock,
+	launcher_play_lock,
+	managed_game_process_is_active,
+)
 from .login_diagnostics import inspect_login_environment
 from .login_trace import DEFAULT_TRACE_TIMEOUT_SECONDS, LOGIN_TRACE_DISABLED_REASON
 from .overlay import cache_compatibility_binaries, prepare_runtime_view
@@ -855,6 +860,7 @@ def _play(
 			realm=realm,
 			reuse_prepared=not play_lease.preparation_allowed,
 			before_game=play_lease.allow_shared_clients,
+			game_lease_fds=play_lease.inherited_fds,
 		)
 
 
@@ -869,6 +875,7 @@ def _play_locked(
 	realm: str | None = None,
 	reuse_prepared: bool = False,
 	before_game: Callable[[], None] | None = None,
+	game_lease_fds: Sequence[int] = (),
 ) -> int:
 	if game_dir is None and game_import_requires_verification(paths):
 		raise LauncherError(
@@ -980,6 +987,7 @@ def _play_locked(
 			use_gamebox=not no_box,
 			concurrent_prefix_launch=reuse_prepared,
 			check=False,
+			pass_fds=game_lease_fds,
 		)
 	except KeyboardInterrupt:
 		current_game_log = _current_game_log(
@@ -1505,7 +1513,10 @@ def _play_guard(
 ) -> AbstractContextManager[LauncherPlayLease]:
 	if dry_run:
 		return nullcontext(LauncherPlayLease.dry_run())
-	return launcher_play_lock(paths.launcher_operation_lock)
+	return launcher_play_lock(
+		paths.launcher_operation_lock,
+		active_game_probe=lambda: _managed_game_process_is_active(paths),
+	)
 
 
 def _operation_guard(
@@ -1515,7 +1526,18 @@ def _operation_guard(
 ) -> AbstractContextManager[None]:
 	if dry_run:
 		return nullcontext()
-	return launcher_operation_lock(paths.launcher_operation_lock, operation)
+	return launcher_operation_lock(
+		paths.launcher_operation_lock,
+		operation,
+		active_game_probe=lambda: _managed_game_process_is_active(paths),
+	)
+
+
+def _managed_game_process_is_active(paths: AppPaths) -> bool:
+	return managed_game_process_is_active(
+		paths.runtime_view,
+		(paths.proton_prefix, paths.umu_prefix),
+	)
 
 
 def _emit(value: object, as_json: bool) -> None:

ptlinux/command.py

@@ -99,10 +99,14 @@ class CommandRunner:
 		check: bool = True,
 		stream_output: bool = False,
 		output_line_filter: OutputLineFilter | None = None,
+		pass_fds: Sequence[int] = (),
 	) -> CommandOutcome:
 		arguments = [str(value) for value in argv]
 		if not arguments:
 			raise ValueError("command argv cannot be empty")
+		inherited_fds = tuple(dict.fromkeys(pass_fds))
+		if any(not isinstance(value, int) or value < 0 for value in inherited_fds):
+			raise ValueError("inherited file descriptors must be non-negative integers")
 		overrides = dict(env_overrides or {})
 		started = time.monotonic()
 		if self.dry_run:
@@ -128,6 +132,7 @@ class CommandRunner:
 				timeout_seconds=timeout_seconds,
 				started=started,
 				output_line_filter=output_line_filter,
+				pass_fds=inherited_fds,
 			)
 		else:
 			try:
@@ -142,6 +147,7 @@ class CommandRunner:
 					stderr=subprocess.PIPE,
 					timeout=timeout_seconds,
 					check=False,
+					pass_fds=inherited_fds,
 				)
 				outcome = CommandOutcome(
 					argv=arguments,
@@ -176,6 +182,7 @@ class CommandRunner:
 		timeout_seconds: float,
 		started: float,
 		output_line_filter: OutputLineFilter | None,
+		pass_fds: tuple[int, ...],
 	) -> CommandOutcome:
 		process = subprocess.Popen(
 			arguments,
@@ -188,6 +195,7 @@ class CommandRunner:
 			stderr=subprocess.PIPE,
 			bufsize=1,
 			start_new_session=True,
+			pass_fds=pass_fds,
 		)
 		stdout = BoundedTextCapture()
 		stderr = BoundedTextCapture()

ptlinux/gamebox_runtime.py

@@ -43,6 +43,8 @@ _X_PROPERTY_NOTIFY = 28
 _X_PROPERTY_CHANGE_MASK = 1 << 22
 _X_SUBSTRUCTURE_NOTIFY_MASK = 1 << 19
 _X_SUBSTRUCTURE_REDIRECT_MASK = 1 << 20
+_X_WM_STATE_WITHDRAWN = 0
+_X_WM_STATE_NORMAL = 1
 _X_WM_STATE_ICONIC = 3
 _NET_WM_STATE_REMOVE = 0
 _NET_WM_STATE_SOURCE_APPLICATION = 1
@@ -448,6 +450,18 @@ class _X11:
 			return None
 		return values[0]
 
+	def restore_normal_window_state(self, window: int) -> bool:
+		"""Undo a nested iconify request without raising the host window."""
+
+		self._replace_long_property(
+			window,
+			b"WM_STATE",
+			b"WM_STATE",
+			(_X_WM_STATE_NORMAL, 0),
+		)
+		self.library.XSync(self.display, 0)
+		return self.window_state(window) == _X_WM_STATE_NORMAL
+
 	def window_is_borderless(self, window: int) -> bool | None:
 		"""Return whether the client currently requests no Motif decorations."""
 
@@ -1463,6 +1477,54 @@ def _repair_gamescope_game_window_focus(mapper: _X11, window: int) -> bool:
 	return False
 
 
+def _resolve_gamescope_game_window(
+	mapper: _X11,
+	window: int,
+	*,
+	window_title: str,
+	excluded_window_ids: Collection[int],
+) -> int | None:
+	"""Return a valid nested client across Wine's login-window transition."""
+
+	try:
+		state = mapper.window_state(window)
+	except Exception:
+		state = None
+	if state == _X_WM_STATE_ICONIC:
+		try:
+			if not mapper.restore_normal_window_state(window):
+				return None
+		except Exception:
+			return None
+		print(
+			"Game login window requested minimization; kept it visible inside "
+			"Gamescope.",
+			file=sys.stderr,
+			flush=True,
+		)
+		return window
+	if state is not None and state != _X_WM_STATE_WITHDRAWN:
+		return window
+
+	try:
+		found = mapper.find_first_window(
+			window_title,
+			excluded_window_ids=set(excluded_window_ids) | {window},
+		)
+	except Exception:
+		return None
+	if found is None:
+		return None
+	replacement, title = found
+	_apply_game_window_identity(mapper, replacement)
+	print(
+		f"Game login window changed; following it inside Gamescope: {title}",
+		file=sys.stderr,
+		flush=True,
+	)
+	return replacement
+
+
 def _enable_game_window_scaling(mapper: _X11, window: int) -> bool:
 	"""Enable confirmed resize/maximize actions without risking game startup."""
 
@@ -1587,9 +1649,14 @@ def _maintain_gamescope_game_window_focus(
 	mapper: _X11,
 	process: subprocess.Popen[bytes],
 	window: int,
+	*,
+	window_title: str = WINDOW_TITLE,
+	existing_window_ids: Collection[int] = (),
 ) -> int:
-	"""Restore nested keyboard focus after host resize/maximize operations."""
+	"""Keep a valid, focused nested client through login and host resizing."""
 
+	active_window: int = window
+	retired_window_ids = set(existing_window_ids)
 	next_focus_repair_at = (
 		time.monotonic() + GAMESCOPE_FOCUS_REPAIR_INTERVAL_SECONDS
 	)
@@ -1598,7 +1665,22 @@ def _maintain_gamescope_game_window_focus(
 		now = time.monotonic()
 		if now < next_focus_repair_at:
 			continue
-		_repair_gamescope_game_window_focus(mapper, window)
+		resolved_window = _resolve_gamescope_game_window(
+			mapper,
+			active_window,
+			window_title=window_title,
+			excluded_window_ids=retired_window_ids,
+		)
+		if resolved_window is None:
+			next_focus_repair_at = (
+				time.monotonic() + GAMESCOPE_FOCUS_REPAIR_INTERVAL_SECONDS
+			)
+			continue
+		resolved_window_id = resolved_window
+		if resolved_window_id != active_window:
+			retired_window_ids.add(active_window)
+			active_window = resolved_window_id
+		_repair_gamescope_game_window_focus(mapper, active_window)
 		next_focus_repair_at = (
 			time.monotonic() + GAMESCOPE_FOCUS_REPAIR_INTERVAL_SECONDS
 		)
@@ -1785,6 +1867,8 @@ def run_game_window(
 						mapper,
 						process,
 						game_window,
+						window_title=window_title,
+						existing_window_ids=existing_window_ids,
 					)
 				_prepare_game_window(
 					mapper,

ptlinux/gamescope_runtime.py

@@ -27,10 +27,11 @@ WAYLAND_BACKING_FIX_VERSION = (3, 16, 28)
 BUNDLED_GAMESCOPE_VERSION = (3, 16, 20)
 BUNDLED_GAMESCOPE_FILENAME = "gamescope-3.16.20-ubuntu26.04-amd64"
 BUNDLED_GAMESCOPE_SHA256 = (
-    "d4a082d8db0c467f65b429b6fb339b56b9a0d3e17e9c1957ede9ba1cb9a3ec90"
+    "3fc81536c22dcce2c593c11507a612c13221f5b2ce2e5326f7c63706ca965639"
 )
 BUNDLED_GAMESCOPE_OS_ID = "ubuntu"
 BUNDLED_GAMESCOPE_OS_VERSION = "26.04"
+KEEP_NESTED_WINDOWS_VISIBLE_ENV = "PTLINUX_GAMESCOPE_KEEP_WINDOWS_VISIBLE"
 HASH_READ_SIZE = 256 * 1024
 _GAMESCOPE_VERSION_PATTERN = re.compile(
     r"\bgamescope\s+version\s+(\d+)\.(\d+)\.(\d+)",
@@ -357,6 +358,11 @@ def run_gamescope(command: Sequence[str], width: int, height: int) -> int:
         # SDL otherwise requests compositor bypass, which can switch near
         # screen-filling sizes and visibly flicker while Gamescope is scaling.
         environment["SDL_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR"] = "0"
+    if using_bundled_gamescope:
+        # The game asks its X11 WM to iconify the first client while entering
+        # the login screen. Our scoped Gamescope patch keeps that nested surface
+        # visible without activating or raising the host window.
+        environment[KEEP_NESTED_WINDOWS_VISIBLE_ENV] = "1"
     try:
         process = subprocess.Popen(launch_command, env=environment)
     except OSError as exc:
@@ -374,7 +380,7 @@ def run_gamescope(command: Sequence[str], width: int, height: int) -> int:
         if using_bundled_gamescope:
             message += (
                 " Launcher-local lazy-output, live-resize, letterbox backing, "
-                "and decoration-input fixes are active."
+                "decoration-input, and login-window visibility fixes are active."
             )
         print(message, file=sys.stderr, flush=True)
     elif backend == "wayland":

ptlinux/locking.py

@@ -7,7 +7,12 @@ from datetime import datetime
 import fcntl
 import os
 from pathlib import Path
-from typing import Iterator, TextIO
+from typing import Callable, Iterator, Sequence, TextIO
+
+
+ActiveGameProbe = Callable[[], bool]
+MAX_PROCESS_ENVIRONMENT_BYTES = 1024 * 1024
+MAX_PROCESS_COMMAND_BYTES = 128 * 1024
 
 
 class OperationBusyError(RuntimeError):
@@ -51,9 +56,22 @@ class LauncherPlayLease:
 	def record_owned(self) -> bool:
 		return self._record_owned
 
+	@property
+	def inherited_fds(self) -> tuple[int, ...]:
+		"""Keep the shared lease alive in the launched game supervisor."""
+
+		if self._handle is None:
+			return ()
+		return (self._handle.fileno(),)
+
 
 @contextmanager
-def launcher_operation_lock(lock_path: Path, operation: str) -> Iterator[None]:
+def launcher_operation_lock(
+	lock_path: Path,
+	operation: str,
+	*,
+	active_game_probe: ActiveGameProbe | None = None,
+) -> Iterator[None]:
 	lock_path.parent.mkdir(parents=True, exist_ok=True)
 	with lock_path.open("a+", encoding="utf-8") as handle:
 		try:
@@ -64,6 +82,11 @@ def launcher_operation_lock(lock_path: Path, operation: str) -> Iterator[None]:
 			raise OperationBusyError(
 				f"launcher files are busy ({owner}); wait for it to finish and try again"
 			) from exc
+		if active_game_probe is not None and active_game_probe():
+			raise OperationBusyError(
+				"launcher files are busy (active managed game client detected); "
+				"close every game client and try again"
+			)
 		_write_owner(handle, operation)
 		try:
 			yield
@@ -78,6 +101,8 @@ def launcher_operation_lock(lock_path: Path, operation: str) -> Iterator[None]:
 def launcher_play_lock(
 	lock_path: Path,
 	operation: str = "play",
+	*,
+	active_game_probe: ActiveGameProbe | None = None,
 ) -> Iterator[LauncherPlayLease]:
 	"""Serialize preparation, then allow multiple active game clients.
 
@@ -104,6 +129,18 @@ def launcher_play_lock(
 				preparation_allowed=False,
 				record_owned=False,
 			)
+		else:
+			if active_game_probe is not None and active_game_probe():
+				# A game from an older launcher may have outlived its Python
+				# supervisor and therefore its inherited lock. Rejoin that live
+				# prefix without mutating its runtime view or waiting for it to exit.
+				_write_owner(handle, operation)
+				fcntl.flock(handle.fileno(), fcntl.LOCK_SH)
+				lease = LauncherPlayLease(
+					handle,
+					preparation_allowed=False,
+					record_owned=True,
+				)
 			else:
 				_write_owner(handle, f"{operation} preparation")
 				lease = LauncherPlayLease(
@@ -123,6 +160,79 @@ def launcher_play_lock(
 			fcntl.flock(handle.fileno(), fcntl.LOCK_UN)
 
 
+def managed_game_process_is_active(
+	runtime_view: Path,
+	wine_prefixes: Sequence[Path],
+	*,
+	process_root: Path = Path("/proc"),
+) -> bool:
+	"""Detect a managed Wine game that outlived its launcher supervisor."""
+
+	prefixes = {_normalized_path(prefix) for prefix in wine_prefixes}
+	prefixes.discard("")
+	if not prefixes:
+		return False
+	runtime_marker = _normalized_path(runtime_view).casefold().replace("\\", "/")
+	if not runtime_marker:
+		return False
+	runtime_marker = runtime_marker.rstrip("/") + "/"
+	try:
+		processes = tuple(process_root.iterdir())
+	except OSError:
+		return False
+	for process in processes:
+		if not process.name.isdecimal():
+			continue
+		try:
+			name = (process / "comm").read_text(
+				encoding="utf-8",
+				errors="replace",
+			).strip().casefold()
+		except OSError:
+			continue
+		if not name.endswith(".exe"):
+			continue
+		environment = _read_bounded(process / "environ", MAX_PROCESS_ENVIRONMENT_BYTES)
+		if environment is None:
+			continue
+		wine_prefix = next(
+			(
+				entry.removeprefix(b"WINEPREFIX=")
+				for entry in environment.split(b"\0")
+				if entry.startswith(b"WINEPREFIX=")
+			),
+			None,
+		)
+		if (
+			wine_prefix is None
+			or _normalized_path(os.fsdecode(wine_prefix)) not in prefixes
+		):
+			continue
+		command = _read_bounded(process / "cmdline", MAX_PROCESS_COMMAND_BYTES)
+		if command is None:
+			continue
+		normalized_command = os.fsdecode(command).casefold().replace("\\", "/")
+		if runtime_marker in normalized_command:
+			return True
+	return False
+
+
+def _read_bounded(path: Path, maximum_bytes: int) -> bytes | None:
+	try:
+		with path.open("rb") as handle:
+			value = handle.read(maximum_bytes + 1)
+	except OSError:
+		return None
+	return value if len(value) <= maximum_bytes else None
+
+
+def _normalized_path(path: Path | str) -> str:
+	value = str(path)
+	if not value:
+		return ""
+	return str(Path(value).expanduser().resolve(strict=False))
+
+
 def _read_owner(handle: TextIO) -> str:
 	handle.seek(0)
 	return handle.read().strip() or "unknown operation"

ptlinux/runtime.py

@@ -406,6 +406,7 @@ def run_game(
 	check: bool = True,
 	extra_environment: Mapping[str, str] | None = None,
 	output_line_filter: OutputLineFilter | None = None,
+	pass_fds: Sequence[int] = (),
 ) -> CommandOutcome:
 	_require_container_host(selection, runner)
 	if not paths.runtime_view.is_dir() and not runner.dry_run:
@@ -502,6 +503,7 @@ def run_game(
 		check=check,
 		stream_output=True,
 		output_line_filter=output_line_filter,
+		pass_fds=pass_fds,
 	)
 
 

updates/stable.json

@@ -1,11 +1,11 @@
 {
-  "archive_sha256": "890443aab4cd0e33bb2e2a44ea86b3fd929488eba045b803c2c0662ce68c08ff",
-  "archive_size": 1410277,
+  "archive_sha256": "3e00fc6cd72b5ae79adee56642a10b90d410080e67da099292aefcd5cf406681",
+  "archive_size": 1413002,
   "archive_url": "https://git.m4ko.net/m4ko/pristontale-eu-linux/releases/download/v0.9.5/pristontale-eu-linux-update-v0.9.5.tar.gz",
   "channel": "stable",
   "minimum_updater_version": "0.5.0",
   "notes_url": "https://git.m4ko.net/m4ko/pristontale-eu-linux/releases/tag/v0.9.5",
-  "published_at": "2026-09-06T20:06:31Z",
+  "published_at": "2026-09-06T20:09:16Z",
   "schema": 1,
   "version": "0.9.5"
 }