Added better support for kubuntu and fixed some issues with telemetry.

packaging/install-dependencies.sh

@@ -380,7 +380,9 @@ ptlinux_install_host_dependencies()
 	ptlinux_detect_missing_dependencies "$family"
 	if (( ${#PTLINUX_MISSING_DEPENDENCIES[@]} == 0 ))
 	then
-		printf '%s\n' "All required host dependencies are already available."
+		printf '%s\n' \
+			"All automatically managed host packages are already available." \
+			"Final graphics and runtime diagnostics run after launcher installation."
 		return 0
 	fi
 	if [[ "$family" == "unknown" ]]

ptlinux/cli.py

@@ -88,6 +88,7 @@ from .telemetry import (
 	network_http_status,
 	shutdown_shared_telemetry,
 )
+from .system_identity import is_running_inside_steam_runtime
 from .umu import (
 	UmuBootstrapResult,
 	find_umu_launcher,
@@ -310,12 +311,9 @@ def main(
 		initialized_telemetry, telemetry_owner = initialize_shared_telemetry(
 			paths,
 			session_metadata={"interface": interface, "command": command},
+			report_launcher_lifecycle=command == "gui",
 		)
 		telemetry = initialized_telemetry
-		if command != "gui":
-			initialized_telemetry.mark_ready(
-				{"interface": interface, "command": command}
-			)
 	telemetry_events = _command_telemetry_events(command, arguments, paths)
 	operation_started = time.monotonic()
 	if telemetry is not None and telemetry_events is not None:
@@ -652,9 +650,24 @@ def _doctor(as_json: bool) -> int:
 			status = tool.path or "MISSING"
 			required = "required" if tool.required else "optional"
 			print(f"{tool.name:12} {status} [{required}] — {tool.purpose}")
+		optional_missing = [
+			tool.name for tool in report.tools if not tool.required and tool.path is None
+		]
+		if optional_missing:
+			print(
+				"Optional tools missing (these do not block launch): "
+				+ ", ".join(optional_missing)
+			)
+		print(f"Host readiness: {'READY' if report.ok else 'BLOCKED'}")
+		if report.blockers:
+			print("Blocking diagnostics:")
+			for blocker in report.blockers:
+				print(f"  - {blocker}")
 		for warning in report.warnings:
 			print(f"Warning: {warning}")
-		if report.package_hint:
+		if report.package_hint and any(
+			tool.required and tool.path is None for tool in report.tools
+		):
 			print(report.package_hint)
 	return 0 if report.ok else 1
 
@@ -1322,6 +1335,28 @@ def _play_locked(
 			"run pristontale-eu update before playing"
 		)
 	settings = _load_or_default_settings(paths, persist=not dry_run)
+	launcher_nested_in_steam_runtime = is_running_inside_steam_runtime()
+	if launcher_nested_in_steam_runtime and not dry_run:
+		print(
+			"Warning: the launcher itself is running inside Steam Runtime. Start "
+			"it from the desktop menu or a host terminal; nesting its UMU runtime "
+			"can cause black game output.",
+			file=sys.stderr,
+			flush=True,
+		)
+	window_launch_metadata: dict[str, object] = {
+		"gamebox_enabled": not no_box,
+		"resizable_window_requested": settings.allow_window_resizing,
+		"launcher_inside_steam_runtime": launcher_nested_in_steam_runtime,
+	}
+	if (
+		launcher_nested_in_steam_runtime
+		and settings.allow_window_resizing
+		and not no_box
+	):
+		window_launch_metadata["gamescope_disabled_reason"] = (
+			"launcher_inside_steam_runtime"
+		)
 	start_option = select_depot_start_option(
 		read_cached_depot_launch_catalog(paths.depot_launch_catalog_cache),
 		realm or settings.realm,
@@ -1412,11 +1447,13 @@ def _play_locked(
 	game_started_at = time.monotonic()
 	launch_success_lock = threading.Lock()
 	launch_success_reported = False
+	reported_runtime_warnings: set[str] = set()
 	if telemetry is not None and not dry_run:
 		telemetry.send_event(
 			"game_launch_started",
 			metadata={
 				**launch_session_metadata,
+				**window_launch_metadata,
 				"launch_duration_ms": round(
 					(game_started_at - launch_requested_at) * 1000
 				),
@@ -1438,6 +1475,27 @@ def _play_locked(
 		"""Timestamp launch success when the supervisor first confirms readiness."""
 
 		nonlocal launch_success_reported
+		presentation_failure = _gamescope_presentation_failure(line)
+		if telemetry is not None and not dry_run and presentation_failure is not None:
+			with launch_success_lock:
+				if presentation_failure not in reported_runtime_warnings:
+					reported_runtime_warnings.add(presentation_failure)
+					telemetry.send_event(
+						"game_window_diagnostic",
+						severity="warning",
+						metadata={
+							**launch_session_metadata,
+							**window_launch_metadata,
+							"component": "gamescope_host",
+							"diagnostic": presentation_failure,
+							"runtime": selection.kind,
+							"realm": start_option.name,
+						},
+						context={
+							"operation": "launch_game",
+							"stage": "presentation",
+						},
+					)
 		window_diagnostic = parse_window_diagnostic(line)
 		if window_diagnostic is not None:
 			diagnostic_session_id = window_diagnostic.get("session_id")
@@ -1470,6 +1528,7 @@ def _play_locked(
 				"game_launch_success",
 				metadata={
 					**launch_session_metadata,
+					**window_launch_metadata,
 					"launch_duration_ms": round(
 						(ready_at - launch_requested_at) * 1000
 					),
@@ -1514,6 +1573,7 @@ def _play_locked(
 				message="Game launch was interrupted",
 				metadata={
 					**launch_session_metadata,
+					**window_launch_metadata,
 					"runtime_seconds": round(time.monotonic() - game_started_at),
 					"clean_exit": False,
 					"session_duration_class": _session_duration_class(
@@ -1586,6 +1646,7 @@ def _play_locked(
 	if telemetry is not None and not dry_run:
 		common_game_metadata: dict[str, object] = {
 			**launch_session_metadata,
+			**window_launch_metadata,
 			"runtime_seconds": round(game_runtime_seconds),
 			"clean_exit": clean_exit,
 			"timed_out": outcome.timed_out,
@@ -1610,6 +1671,7 @@ def _play_locked(
 					"game_launch_success",
 					metadata={
 						**launch_session_metadata,
+						**window_launch_metadata,
 						"detection_duration_ms": round(game_runtime_seconds * 1000),
 						"detected_after_exit": True,
 						"game_window_ready": game_window_ready,
@@ -1896,12 +1958,32 @@ def _runtime_issue_summary(stderr: str) -> dict[str, object]:
 		"gstreamer_missing_libraries": missing_libraries,
 		"gstreamer_stream_error": "winegstreamer error" in folded,
 		"mesa_egl_initialization_failed": "egl: failed to create dri2 screen" in folded,
+		"gamescope_present_queue_unsupported": (
+			"physical device queue doesn't support presenting on our surface" in folded
+		),
+		"gamescope_vulkan_output_failed_count": folded.count(
+			"vulkan_make_output failed"
+		),
 		"steam_api_app_id_missing": "steamapi_init() failed; no appid found" in folded,
 		"dbghelp_symdeferred_assertion_count": folded.count(dbghelp_assertion),
 		"bubblewrap_uid_map_permission_denied": bwrap_uid_map_denied in folded,
 	}
 
 
+def _gamescope_presentation_failure(output: str) -> str | None:
+	folded = output.casefold()
+	for diagnostic, marker in (
+		(
+			"gamescope_present_queue_unsupported",
+			"physical device queue doesn't support presenting on our surface",
+		),
+		("gamescope_vulkan_output_failed", "vulkan_make_output failed"),
+	):
+		if marker in folded:
+			return diagnostic
+	return None
+
+
 def _game_window_was_ready(stderr: str) -> bool:
 	return _game_readiness_signal(stderr) is not None
 

ptlinux/doctor.py

@@ -42,19 +42,71 @@ class DoctorReport:
 	package_hint: str | None
 	warnings: list[str]
 
+	@property
+	def blockers(self) -> tuple[str, ...]:
+		return host_readiness_blockers(self)
+
 	def to_dict(self) -> dict[str, object]:
-		return asdict(self)
+		payload = asdict(self)
+		payload["blockers"] = list(self.blockers)
+		return payload
 
 
-def inspect_host(environment: Mapping[str, str] | None = None) -> DoctorReport:
+def host_readiness_blockers(report: DoctorReport) -> tuple[str, ...]:
+	"""Explain every condition that makes a host report fail readiness."""
+
+	blockers = [
+		f"{tool.name} is missing ({tool.purpose})."
+		for tool in report.tools
+		if tool.required and tool.path is None
+	]
+	bubblewrap = next(
+		(tool for tool in report.tools if tool.name == "bubblewrap"),
+		None,
+	)
+	if (
+		bubblewrap is not None
+		and bubblewrap.required
+		and bubblewrap.path is not None
+		and not report.container_host.ready
+	):
+		issue = report.container_host.issue or "probe failed"
+		message = f"Bubblewrap cannot create the Steam Runtime sandbox ({issue})."
+		if report.container_host.recommendation:
+			message += f" {report.container_host.recommendation}"
+		blockers.append(message)
+	if report.container_host.broken_umu_profile_link:
+		blockers.append(
+			"UMU's AppArmor profile link is broken; run "
+			"`pristontale-eu container-host --repair`."
+		)
+	if not report.ok and not blockers:
+		blockers.append(
+			"The host readiness check failed for an unclassified reason; "
+			"run `pristontale-eu --json doctor` and report its output."
+		)
+	return tuple(blockers)
+
+
+def inspect_host(
+	environment: Mapping[str, str] | None = None,
+	*,
+	vulkan_support: Mapping[str, object] | None = None,
+) -> DoctorReport:
 	env = os.environ if environment is None else environment
 	os_release = _read_os_release()
 	distribution = os_release.get("ID", "unknown")
 	version = os_release.get("VERSION_ID", "unknown")
+	architecture = platform.machine()
 	wine_tools = find_wine_tools()
 	umu_path = _umu_path(env)
 	container_host = inspect_container_host(environment=env)
 	container_required = umu_path is not None
+	detected_vulkan = (
+		dict(vulkan_support)
+		if vulkan_support is not None
+		else _inspect_vulkan_support(env)
+	)
 	tools = [
 		ToolStatus(
 			"python3",
@@ -117,9 +169,11 @@ def inspect_host(environment: Mapping[str, str] | None = None) -> DoctorReport:
 			"Vulkan diagnostics",
 		),
 	]
-	tools.extend(_platform_optional_tools(distribution, architecture=platform.machine()))
+	if architecture.casefold() in {"x86_64", "amd64"}:
+		tools.extend(_vulkan_tool_statuses(detected_vulkan, distribution))
+	tools.extend(_platform_optional_tools(distribution, architecture=architecture))
 	warnings: list[str] = []
-	if platform.machine().casefold() not in {"x86_64", "amd64"}:
+	if architecture.casefold() not in {"x86_64", "amd64"}:
 		warnings.append("PristonTale EU requires an x86-64 host with 32-bit Vulkan support.")
 	if not env.get("WAYLAND_DISPLAY") and not env.get("DISPLAY"):
 		warnings.append("No graphical X11 or Wayland session is visible.")
@@ -138,7 +192,7 @@ def inspect_host(environment: Mapping[str, str] | None = None) -> DoctorReport:
 			"UMU's AppArmor profile link is broken and may prevent profiles from "
 			"loading after reboot; run `pristontale-eu container-host --repair`."
 		)
-	warnings.extend(_arch_runtime_warnings(distribution, platform.machine()))
+	warnings.extend(_arch_runtime_warnings(distribution, architecture))
 	required_ok = all(item.path is not None for item in tools if item.required)
 	return DoctorReport(
 		ok=(
@@ -148,7 +202,7 @@ def inspect_host(environment: Mapping[str, str] | None = None) -> DoctorReport:
 		),
 		distribution=distribution,
 		version=version,
-		architecture=platform.machine(),
+		architecture=architecture,
 		display_backend="wayland" if env.get("WAYLAND_DISPLAY") else "x11",
 		tools=tools,
 		container_host=container_host,
@@ -228,11 +282,6 @@ def _platform_optional_tools(distribution: str, *, architecture: str) -> list[To
 		return []
 	if distribution in ARCH_FAMILY_DISTRIBUTIONS:
 		return [
-			_optional_tool_status(
-				"lib32-vulkan",
-				"/usr/lib32/libvulkan.so.1",
-				"32-bit Vulkan runtime compatibility layer",
-			),
 			_optional_tool_status(
 				"lib32-gstreamer",
 				"/usr/lib32/gstreamer-1.0",
@@ -250,11 +299,6 @@ def _arch_runtime_warnings(distribution: str, architecture: str) -> list[str]:
 			"Non-x86_64 Linux hosts are not a supported runtime architecture for this game."
 		]
 	warnings: list[str] = []
-	if not _path_exists("/usr/lib32/libvulkan.so.1"):
-		warnings.append(
-			"Install lib32-vulkan-icd-loader and the GPU vendor's matching 32-bit "
-			"Vulkan driver; this 32-bit D3D9 client otherwise cannot initialize DXVK."
-		)
 	if not _path_exists("/usr/lib32/gstreamer-1.0"):
 		warnings.append(
 			"Install lib32-gstreamer and lib32-gst-plugins-base if the login video or "
@@ -264,6 +308,77 @@ def _arch_runtime_warnings(distribution: str, architecture: str) -> list[str]:
 	return warnings
 
 
+def _inspect_vulkan_support(environment: Mapping[str, str]) -> dict[str, object]:
+	try:
+		from .telemetry_environment import inspect_vulkan_support
+
+		return inspect_vulkan_support(environment)
+	except Exception:
+		return {}
+
+
+def _vulkan_tool_statuses(
+	support: Mapping[str, object],
+	distribution: str,
+) -> list[ToolStatus]:
+	return [
+		_vulkan_tool_status(64, support, distribution),
+		_vulkan_tool_status(32, support, distribution),
+	]
+
+
+def _vulkan_tool_status(
+	bits: int,
+	support: Mapping[str, object],
+	distribution: str,
+) -> ToolStatus:
+	available = support.get(f"vulkan_{bits}bit") is True
+	loader_available = support.get(f"vulkan_{bits}bit_loader_available") is True
+	icd_available = support.get(f"vulkan_{bits}bit_icd_available") is True
+	purpose = f"{bits}-bit Vulkan loader and GPU ICD required by DXVK"
+	if not available:
+		missing_parts: list[str] = []
+		if not loader_available:
+			missing_parts.append("loader")
+		if not icd_available:
+			missing_parts.append("GPU driver/ICD")
+		purpose = (
+			f"{bits}-bit Vulkan {' and '.join(missing_parts)} required by DXVK; "
+			+ _vulkan_package_guidance(distribution, bits)
+		)
+	return ToolStatus(
+		f"vulkan-{bits}bit",
+		"loader+ICD" if available else None,
+		True,
+		purpose,
+	)
+
+
+def _vulkan_package_guidance(distribution: str, bits: int) -> str:
+	suffix = ":i386" if bits == 32 else ""
+	if distribution == "ubuntu":
+		return (
+			"on Ubuntu/Kubuntu install "
+			f"libvulkan1{suffix} and the matching GPU package "
+			f"(mesa-vulkan-drivers{suffix} or libnvidia-gl-<version>{suffix})"
+		)
+	if distribution in {"debian", "linuxmint", "pop", "elementary", "zorin"}:
+		return (
+			f"with APT install libvulkan1{suffix} and the matching {bits}-bit GPU ICD"
+		)
+	if distribution in {"fedora", "nobara"}:
+		return f"install the matching {bits}-bit Vulkan loader and GPU driver with DNF"
+	if distribution in ARCH_FAMILY_DISTRIBUTIONS:
+		return (
+			"install vulkan-icd-loader and the GPU vendor driver"
+			if bits == 64
+			else "install lib32-vulkan-icd-loader and the matching lib32 GPU driver"
+		)
+	if distribution in {"opensuse-tumbleweed", "opensuse-leap", "suse"}:
+		return f"install the matching {bits}-bit Vulkan loader and GPU driver with Zypper"
+	return f"install the matching {bits}-bit Vulkan loader and GPU driver"
+
+
 def _optional_tool_status(name: str, path: str, purpose: str) -> ToolStatus:
 	if _path_exists(path):
 		return ToolStatus(name, path, required=False, purpose=purpose)

ptlinux/gamebox_runtime.py

@@ -479,6 +479,18 @@ class _X11:
 			return None
 		return values[0]
 
+	def restore_normal_window_state(self, window: int) -> bool:
+		"""Undo a nested game iconify without activating the outer 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."""
 
@@ -1776,9 +1788,38 @@ def _resolve_gamescope_game_window(
 			wm_state=_wm_state_name(state),
 		)
 	if state == _X_WM_STATE_ICONIC:
-		# IconicState can be a real desktop minimize request. Monitoring must never
+		# This mapper runs inside Gamescope's nested X server. The desktop owns a
-		# turn that user-controlled state back into a visible window.
+		# separate outer window, so restoring this game-driven login transition
-		return None
+		# neither activates nor raises a minimized host window.
+		try:
+			restored = mapper.restore_normal_window_state(window)
+		except Exception as exc:
+			restored = False
+			if diagnostics is not None:
+				diagnostics.record(
+					"nested_iconify_recovery_failed",
+					window_id=window,
+					error_type=type(exc).__name__,
+				)
+		if restored:
+			if diagnostics is not None:
+				diagnostics.record(
+					"nested_iconify_recovered",
+					window_id=window,
+					**_sample_window_diagnostic_details(
+						diagnostics,
+						mapper,
+						window,
+					),
+				)
+			print(
+				"Game login window requested nested minimization; kept its "
+				"surface visible inside Gamescope.",
+				file=sys.stderr,
+				flush=True,
+			)
+			return window
+		state = None
 	if state is not None and state != _X_WM_STATE_WITHDRAWN:
 		return window
 

ptlinux/gamescope_runtime.py

@@ -428,10 +428,41 @@ def _bundled_gamescope_is_usable() -> bool:
     return os.access(path, os.X_OK)
 
 
-def _select_wayland_gamescope(executable: str) -> tuple[str, bool, bool]:
+def _is_kde_session(environment: Mapping[str, str]) -> bool:
+    """Recognize Plasma sessions without relying on an Ubuntu flavor name."""
+
+    if environment.get("KDE_FULL_SESSION", "").strip().casefold() in {
+        "1",
+        "true",
+        "yes",
+    }:
+        return True
+    if environment.get("KDE_SESSION_VERSION", "").strip():
+        return True
+    for key in ("XDG_CURRENT_DESKTOP", "XDG_SESSION_DESKTOP", "DESKTOP_SESSION"):
+        tokens = re.split(
+            r"[^a-z0-9]+",
+            environment.get(key, "").strip().casefold(),
+        )
+        if "kde" in tokens or any(token.startswith("plasma") for token in tokens):
+            return True
+    return False
+
+
+def _select_wayland_gamescope(
+        executable: str,
+        *,
+        environment: Mapping[str, str] | None = None,
+) -> tuple[str, bool, bool]:
     """Choose a direct-safe Gamescope or request the stable composed path."""
 
     version = _read_gamescope_version(executable)
+    env = os.environ if environment is None else environment
+    if _is_kde_session(env):
+        # This is reached only when Plasma has no usable XWayland display. Keep
+        # native Wayland fully composed because newer Gamescope builds still have
+        # KWin-specific presentation failures outside our backing-surface fixes.
+        return executable, True, False
     if version is not None and version >= WAYLAND_BACKING_FIX_VERSION:
         return executable, False, False
     if version == BUNDLED_GAMESCOPE_VERSION and _bundled_gamescope_is_usable():
@@ -458,9 +489,15 @@ def _wayland_socket_available(environment: Mapping[str, str]) -> bool:
 
 
 def _select_host_backend(environment: Mapping[str, str]) -> str:
-    """Prefer Wayland's retained-buffer resize path when it is usable."""
+    """Choose the host backend with a Plasma-safe XWayland fallback."""
 
     if _wayland_socket_available(environment):
+        # Gamescope's native Wayland backend still has KWin-specific presentation,
+        # fullscreen, and fractional-scaling failures. Plasma normally exposes an
+        # XWayland display, so keep the resizable host window on the mature SDL/X11
+        # path while leaving non-Plasma Wayland sessions on direct presentation.
+        if _is_kde_session(environment) and environment.get("DISPLAY", "").strip():
+            return "sdl"
         return "wayland"
     return "sdl"
 
@@ -629,6 +666,13 @@ def run_gamescope(command: Sequence[str], width: int, height: int) -> int:
     diagnostics = WindowDiagnosticRecorder("gamescope_host")
     environment = os.environ.copy()
     backend = _select_host_backend(environment)
+    kde_session = _is_kde_session(environment)
+    kde_wayland_xwayland_fallback = (
+        backend == "sdl"
+        and kde_session
+        and bool(environment.get("WAYLAND_DISPLAY", "").strip())
+        and bool(environment.get("DISPLAY", "").strip())
+    )
     selected_command = list(map(str, command))
     force_composition = backend == "sdl"
     using_bundled_gamescope = False
@@ -637,7 +681,10 @@ def run_gamescope(command: Sequence[str], width: int, height: int) -> int:
             selected_command[0],
             force_composition,
             using_bundled_gamescope,
-        ) = _select_wayland_gamescope(selected_command[0])
+        ) = _select_wayland_gamescope(
+            selected_command[0],
+            environment=environment,
+        )
     mapper = _open_host_x11() if backend == "sdl" else None
     diagnostics.record(
         "runtime_configured",
@@ -647,6 +694,22 @@ def run_gamescope(command: Sequence[str], width: int, height: int) -> int:
         display_available=bool(environment.get("DISPLAY")),
         wayland_display_available=bool(environment.get("WAYLAND_DISPLAY")),
         host_x11_monitor_available=mapper is not None,
+        kde_session=kde_session,
+        kde_wayland_compatibility_mode=(
+            kde_wayland_xwayland_fallback
+            or (backend == "wayland" and kde_session and force_composition)
+        ),
+        kde_wayland_xwayland_fallback=kde_wayland_xwayland_fallback,
+        backend_reason=(
+            "kde_wayland_xwayland_compatibility"
+            if kde_wayland_xwayland_fallback
+            else "wayland_socket"
+            if backend == "wayland"
+            else "x11_or_unavailable_wayland"
+        ),
+        presentation_mode=(
+            f"{backend}_{'composed' if force_composition else 'direct'}"
+        ),
         canvas_width=width,
         canvas_height=height,
     )
@@ -740,6 +803,14 @@ def run_gamescope(command: Sequence[str], width: int, height: int) -> int:
         diagnostics.close(process_started=False, backend=backend)
         raise GamescopeRuntimeError(f"could not start Gamescope: {exc}") from exc
 
+    if kde_wayland_xwayland_fallback:
+        print(
+            "KDE Wayland compatibility mode active: Gamescope is using its "
+            "SDL host window through XWayland to avoid KWin presentation, "
+            "fullscreen, and fractional-scaling failures.",
+            file=sys.stderr,
+            flush=True,
+        )
     if backend == "wayland" and not force_composition:
         message = (
             "Gamescope resize optimization active: native Wayland direct "
@@ -751,6 +822,13 @@ def run_gamescope(command: Sequence[str], width: int, height: int) -> int:
                 "decoration-input, and login-window visibility fixes are active."
             )
         print(message, file=sys.stderr, flush=True)
+    elif backend == "wayland" and kde_session:
+        print(
+            "KDE Wayland compatibility mode active: Gamescope is using its "
+            "composed native fallback because no XWayland display is available.",
+            file=sys.stderr,
+            flush=True,
+        )
     elif backend == "wayland":
         print(
             "Warning: this Gamescope build lacks safe direct Wayland letterbox "

ptlinux/runtime.py

@@ -26,6 +26,10 @@ from .gamebox import (
 )
 from .paths import AppPaths
 from .settings import Settings
+from .system_identity import (
+	detect_distribution_id as _detect_distribution_id,
+	is_running_inside_steam_runtime as _is_running_inside_steam_runtime,
+)
 from .umu import find_umu_launcher
 
 
@@ -468,7 +472,14 @@ def run_game(
 	if use_gamebox:
 		gamescope_path = None
 		game_size = None
-		if settings.allow_window_resizing:
+		if settings.allow_window_resizing and launcher_inside_steam_runtime():
+			print(
+				"Warning: resizable Gamescope was disabled because the launcher "
+				"is already inside Steam Runtime; using a fixed game window.",
+				file=sys.stderr,
+				flush=True,
+			)
+		elif settings.allow_window_resizing:
 			gamescope_environment = os.environ.copy()
 			gamescope_environment.update(environment)
 			gamescope_path = find_gamescope(gamescope_environment)
@@ -714,11 +725,13 @@ def _proton_environment(
 def detect_distribution_id() -> str:
 	"""Return the freedesktop distribution ID without invoking distro tools."""
 
-	try:
+	return _detect_distribution_id()
-		value = platform.freedesktop_os_release().get("ID", "")
+
-	except OSError:
+
-		return ""
+def launcher_inside_steam_runtime() -> bool:
-	return value.strip().casefold()
+	"""Return whether this launcher process is nested in Steam Runtime."""
+
+	return _is_running_inside_steam_runtime()
 
 
 def is_cachyos_host(

ptlinux/telemetry.py

@@ -27,6 +27,7 @@ import uuid
 
 from . import __version__
 from .paths import AppPaths
+from .system_identity import SystemIdentity, detect_system_identity, read_os_release
 from .telemetry_environment import collect_extended_environment
 
 
@@ -267,6 +268,7 @@ class TelemetryService:
 		environment: Mapping[str, str] | None = None,
 		transport: TelemetryTransport | None = None,
 		session_metadata: Mapping[str, object] | None = None,
+		report_launcher_lifecycle: bool | None = None,
 		monotonic: Callable[[], float] = time.monotonic,
 	) -> None:
 		self.paths = paths
@@ -283,10 +285,15 @@ class TelemetryService:
 		self._session_metadata = dict(session_metadata or {})
 		self._monotonic = monotonic
 		self._started_at = monotonic()
-		self._reports_launcher_lifecycle = (
+		process_reports_launcher_lifecycle = (
 			self._environment.get(TELEMETRY_PROCESS_ROLE_VARIABLE, "").strip().casefold()
 			!= TELEMETRY_OPERATION_PROCESS_ROLE
 		)
+		self._reports_launcher_lifecycle = process_reports_launcher_lifecycle and (
+			True
+			if report_launcher_lifecycle is None
+			else bool(report_launcher_lifecycle)
+		)
 		self._enabled = bool(enabled)
 		self._active = False
 		self._accepting = False
@@ -923,6 +930,7 @@ class TelemetryService:
 
 	def _collect_common_payload(self, first_seen: str) -> dict[str, object]:
 		environment = self._environment
+		system_identity = detect_system_identity()
 		payload: dict[str, object] = {
 			"launcher_version": __version__,
 			"launcher_build": environment.get("PTLINUX_BUILD", __version__)[:32],
@@ -934,10 +942,13 @@ class TelemetryService:
 				"install_is_external": _install_is_external(self.paths, environment),
 				"configuration_schema_version": _settings_schema_version(),
 			},
-			"os": _operating_system_info(),
+			"os": _operating_system_info(system_identity),
 			"display": _display_info(environment),
 			"filesystem": _filesystem_info(self.paths.data),
 		}
+		execution_environment = _execution_environment_info(system_identity)
+		if execution_environment is not None:
+			payload["execution_environment"] = execution_environment
 		commit = environment.get("PTLINUX_COMMIT")
 		if commit and re.fullmatch(r"[0-9a-fA-F]{7,40}", commit):
 			payload["launcher_commit"] = commit[:12].lower()
@@ -1097,6 +1108,7 @@ def initialize_shared_telemetry(
 	paths: AppPaths,
 	*,
 	session_metadata: Mapping[str, object] | None = None,
+	report_launcher_lifecycle: bool | None = None,
 ) -> tuple[TelemetryService, bool]:
 	"""Return the process-wide service and whether this caller owns its shutdown."""
 
@@ -1108,6 +1120,7 @@ def initialize_shared_telemetry(
 			paths,
 			enabled=_telemetry_enabled_from_settings(paths),
 			session_metadata=session_metadata,
+			report_launcher_lifecycle=report_launcher_lifecycle,
 		)
 		_shared_service = service
 	service.initialize()
@@ -1230,8 +1243,11 @@ def _fsync_directory(path: Path) -> None:
 		os.close(descriptor)
 
 
-def _operating_system_info() -> dict[str, object]:
+def _operating_system_info(
-	release = _read_os_release()
+	identity: SystemIdentity | None = None,
+) -> dict[str, object]:
+	identity = detect_system_identity() if identity is None else identity
+	release = identity.operating_system_release
 	return {
 		"name": release.get("NAME", platform.system() or "unknown"),
 		"id": release.get("ID", "unknown"),
@@ -1241,27 +1257,38 @@ def _operating_system_info() -> dict[str, object]:
 		"architecture": platform.machine() or "unknown",
 		"machine_architecture": platform.machine() or "unknown",
 		"glibc_version": platform.libc_ver()[1] or None,
+		"identity_source": (
+			"container_host_os_release"
+			if identity.host_release is not None
+			else "execution_os_release"
+		),
 	}
 
 
 def _read_os_release(path: Path = Path("/etc/os-release")) -> dict[str, str]:
-	try:
+	return read_os_release(path)
-		lines = path.read_text(encoding="utf-8", errors="replace").splitlines()
+
-	except OSError:
+
-		return {}
+def _execution_environment_info(
-	result: dict[str, str] = {}
+	identity: SystemIdentity,
-	for line in lines:
+) -> dict[str, object] | None:
-		if not line or line.startswith("#") or "=" not in line:
+	if not identity.running_inside_steam_runtime:
-			continue
+		return None
-		key, raw = line.split("=", 1)
+	release = identity.execution_release
-		if not re.fullmatch(r"[A-Z][A-Z0-9_]*", key):
+	return {
-			continue
+		"containerized": True,
-		value = raw.strip()
+		"kind": "steam_runtime",
-		if len(value) >= 2 and value[0] == value[-1] and value[0] in {"'", '"'}:
+		"id": release.get("ID", "steamrt"),
-			value = value[1:-1]
+		"name": release.get("NAME", "Steam Runtime"),
-		value = value.replace(r"\n", " ").replace(r"\"", '"').replace(r"\\", "\\")
+		"version": release.get(
-		result[key] = value[:255]
+			"PRETTY_NAME",
-	return result
+			release.get("VERSION", "unknown"),
+		),
+		"version_id": release.get("VERSION_ID", "unknown"),
+		"host_os_release_available": identity.host_release is not None,
+		"launcher_inside_game_runtime": True,
+		"glibc_version": platform.libc_ver()[1] or None,
+	}
 
 
 def _display_info(environment: Mapping[str, str]) -> dict[str, object]:

ptlinux/telemetry_environment.py

@@ -106,6 +106,7 @@ def collect_extended_environment(
 		"dependencies": dependencies,
 	}
 	display = _display_info(sysfs_drm)
+	display.update(_kde_display_scaling_info(environment, run_probe))
 	if display:
 		result["display"] = display
 	if gpu:
@@ -263,6 +264,23 @@ def _vulkan_info(
 	return result
 
 
+def inspect_vulkan_support(
+	environment: Mapping[str, str],
+	*,
+	probe_runner: ProbeRunner | None = None,
+	manifest_directories: Sequence[Path] = _VULKAN_MANIFEST_DIRECTORIES,
+	library_roots: Sequence[Path] = _LIBRARY_ROOTS,
+) -> dict[str, object]:
+	"""Return host Vulkan loader and ICD readiness for dependency checks."""
+
+	return _vulkan_info(
+		environment,
+		probe_runner or _run_probe,
+		manifest_directories=manifest_directories,
+		library_roots=library_roots,
+	)
+
+
 def _gpu_info(
 	vulkan_summary: object,
 	*,
@@ -362,7 +380,7 @@ def _dependency_health(
 	try:
 		from .doctor import inspect_host
 
-		report = inspect_host(environment)
+		report = inspect_host(environment, vulkan_support=runtime)
 		for item in report.tools:
 			available = item.path is not None
 			tools[item.name] = available
@@ -834,15 +852,18 @@ def _vulkan_manifests(
 	directories: Sequence[Path],
 ) -> tuple[Path, ...]:
 	candidates: list[Path] = []
-	explicit = environment.get("VK_ICD_FILENAMES", "")
+	override = environment.get("VK_DRIVER_FILES", "").strip()
-	for value in explicit.split(os.pathsep):
+	if not override:
-		if value:
+		override = environment.get("VK_ICD_FILENAMES", "").strip()
-			candidates.append(Path(value).expanduser())
+	if override:
-	for directory in directories:
+		candidates.extend(_manifest_entries(override))
-		try:
+	else:
-			candidates.extend(sorted(directory.glob("*.json")))
+		candidates.extend(_manifest_entries(environment.get("VK_ADD_DRIVER_FILES", "")))
-		except OSError:
+		for directory in _vulkan_manifest_search_directories(environment, directories):
-			continue
+			try:
+				candidates.extend(sorted(directory.glob("*.json")))
+			except OSError:
+				continue
 	seen: set[Path] = set()
 	result: list[Path] = []
 	for candidate in candidates:
@@ -857,6 +878,54 @@ def _vulkan_manifests(
 	return tuple(result)
 
 
+def _manifest_entries(value: str) -> tuple[Path, ...]:
+	result: list[Path] = []
+	for raw_entry in value.split(os.pathsep):
+		if not raw_entry:
+			continue
+		entry = Path(raw_entry).expanduser()
+		try:
+			if entry.is_dir():
+				result.extend(sorted(entry.glob("*.json")))
+			else:
+				result.append(entry)
+		except OSError:
+			continue
+	return tuple(result)
+
+
+def _vulkan_manifest_search_directories(
+	environment: Mapping[str, str],
+	directories: Sequence[Path],
+) -> tuple[Path, ...]:
+	if directories is not _VULKAN_MANIFEST_DIRECTORIES:
+		return tuple(dict.fromkeys(directories))
+	home = environment.get("HOME", "").strip()
+	config_home = environment.get("XDG_CONFIG_HOME", "").strip()
+	data_home = environment.get("XDG_DATA_HOME", "").strip()
+	config_directories = environment.get("XDG_CONFIG_DIRS", "/etc/xdg")
+	data_directories = environment.get(
+		"XDG_DATA_DIRS",
+		"/usr/local/share:/usr/share",
+	)
+	result = list(directories)
+	if config_home:
+		result.append(Path(config_home).expanduser() / "vulkan/icd.d")
+	elif home:
+		result.append(Path(home).expanduser() / ".config/vulkan/icd.d")
+	for value in config_directories.split(os.pathsep):
+		if value:
+			result.append(Path(value).expanduser() / "vulkan/icd.d")
+	if data_home:
+		result.append(Path(data_home).expanduser() / "vulkan/icd.d")
+	elif home:
+		result.append(Path(home).expanduser() / ".local/share/vulkan/icd.d")
+	for value in data_directories.split(os.pathsep):
+		if value:
+			result.append(Path(value).expanduser() / "vulkan/icd.d")
+	return tuple(dict.fromkeys(result))
+
+
 def _vulkan_loader_architectures(library_roots: Sequence[Path]) -> set[int]:
 	architectures: set[int] = set()
 	for root in library_roots:
@@ -967,6 +1036,101 @@ def _display_info(sysfs_drm: Path) -> dict[str, object]:
 	return {"monitor_count": monitor_count} if monitor_count is not None else {}
 
 
+def _kde_display_scaling_info(
+	environment: Mapping[str, str],
+	probe_runner: ProbeRunner,
+) -> dict[str, object]:
+	"""Collect bounded Plasma scale facts without monitor names or resolutions."""
+
+	if not environment.get("WAYLAND_DISPLAY", "").strip() or not _is_kde_desktop(
+		environment
+	):
+		return {}
+	result: dict[str, object] = {"kde_wayland": True}
+	executable = shutil.which(
+		"kscreen-doctor",
+		path=environment.get("PATH", ""),
+	)
+	result["kscreen_doctor_available"] = executable is not None
+	if executable is None:
+		return result
+	probe = probe_runner(
+		(executable, "--json"),
+		environment,
+		PROBE_TIMEOUT_SECONDS,
+	)
+	if probe is None or probe.returncode != 0:
+		result["scale_probe_succeeded"] = False
+		return result
+	try:
+		payload = json.loads(probe.stdout)
+	except (json.JSONDecodeError, TypeError, UnicodeError):
+		result["scale_probe_succeeded"] = False
+		return result
+	if not isinstance(payload, dict):
+		result["scale_probe_succeeded"] = False
+		return result
+	raw_outputs = payload.get("outputs")
+	if isinstance(raw_outputs, list):
+		outputs = raw_outputs
+	elif isinstance(raw_outputs, dict):
+		outputs = list(raw_outputs.values())
+	else:
+		outputs = []
+	scales: list[float] = []
+	for output in outputs[:32]:
+		if not isinstance(output, dict):
+			continue
+		if output.get("connected") is False or output.get("enabled") is False:
+			continue
+		value = output.get("scale")
+		if isinstance(value, bool):
+			continue
+		try:
+			scale = float(value)
+		except (TypeError, ValueError):
+			continue
+		if not 0.5 <= scale <= 8.0:
+			continue
+		scales.append(round(scale, 3))
+	result["scale_probe_succeeded"] = bool(scales)
+	if not scales:
+		return result
+	unique_scales = sorted(set(scales))
+	result.update(
+		{
+			"scale_output_count": len(scales),
+			"scale_min": unique_scales[0],
+			"scale_max": unique_scales[-1],
+			"fractional_scaling": any(
+				abs(scale - round(scale)) > 0.001 for scale in unique_scales
+			),
+			"mixed_scaling": len(unique_scales) > 1,
+			"scale_detection": "kscreen_doctor",
+		}
+	)
+	return result
+
+
+def _is_kde_desktop(environment: Mapping[str, str]) -> bool:
+	if environment.get("KDE_FULL_SESSION", "").strip().casefold() in {
+		"1",
+		"true",
+		"yes",
+	}:
+		return True
+	if environment.get("KDE_SESSION_VERSION", "").strip():
+		return True
+	for key in ("XDG_CURRENT_DESKTOP", "XDG_SESSION_DESKTOP", "DESKTOP_SESSION"):
+		tokens = re.split(
+			r"[^a-z0-9]+",
+			environment.get(key, "").strip().casefold(),
+		)
+		if "kde" in tokens or any(token.startswith("plasma") for token in tokens):
+			return True
+	return False
+
+
 def _connected_monitor_count(sysfs_drm: Path) -> int | None:
 	try:
 		connectors = sorted(sysfs_drm.glob("card[0-9]*-*/status"))[:32]