build fixes

selfdrive/ui/SConscript

@@ -4,14 +4,17 @@ Import('env', 'qt_env', 'arch', 'common', 'messaging', 'visionipc', 'transformat
 base_libs = [common, messaging, visionipc, transformations,
              'm', 'OpenCL', 'ssl', 'crypto', 'pthread'] + qt_env["LIBS"]
 
-base_libs += ['avcodec', 'avformat', 'avutil', 'swresample', 'yuv', 'OmxCore']
+base_libs += ['avcodec', 'avformat', 'avutil', 'swresample', 'yuv']
+
+# OpenMAX is only available in the device-target runtime/sysroot. Host desktop
+# UI builds on Linux should not need or link it.
+if arch == 'larch64':
+  base_libs.append('OmxCore')
 
 if arch == 'larch64':
   base_libs.append('EGL')
 
 if arch == "Darwin":
-  if "OmxCore" in base_libs:
-    base_libs.remove("OmxCore")
   del base_libs[base_libs.index('OpenCL')]
   qt_env['FRAMEWORKS'] += ['OpenCL']
 

system/ui/lib/wifi_manager.py

@@ -170,15 +170,18 @@ class WifiManager:
     allow_desktop_fake = PC and os.getenv("SP_ALLOW_DESKTOP_FAKE_WIFI", "0").lower() in TRUE_VALUES
     has_nmcli = shutil.which("nmcli") is not None
 
+    if allow_desktop_fake:
+      self._router_main = None
+      self._conn_monitor = None
+      self._nm = None
+      self._fake_networking = True
     # DBus connections
-    if not JEEPNY_AVAILABLE:
+    elif not JEEPNY_AVAILABLE:
       cloudlog.warning(f"jeepney unavailable: {JEEPNY_IMPORT_ERROR}")
       self._router_main = None
       self._conn_monitor = None
       self._nm = None
-      if allow_desktop_fake:
-        self._fake_networking = True
-      elif has_nmcli:
+      if has_nmcli:
         self._nmcli_networking = True
       else:
         cloudlog.error("No networking backend available (jeepney missing, nmcli unavailable)")
@@ -193,9 +196,7 @@ class WifiManager:
         self._router_main = None
         self._conn_monitor = None
         self._nm = None
-        if allow_desktop_fake:
-          self._fake_networking = True
-        elif has_nmcli:
+        if has_nmcli:
           self._nmcli_networking = True
         else:
           cloudlog.error("No networking backend available (D-Bus unavailable, nmcli unavailable)")

tools/STARPILOT_DEVELOPMENT.md

@@ -9,6 +9,8 @@ The goal is simple: keep the device build intact, keep host tools consistent wit
 
 ## Prerequisites
 
+- On Ubuntu/Linux, run `tools/install_ubuntu_dependencies.sh`
+  - `tools/ubuntu_setup.sh` runs both the Ubuntu and Python dependency installers
 - Run `tools/install_python_dependencies.sh`
 - Have `uv` available in your shell
 - For device-target builds, install Docker Desktop or Podman with Linux/aarch64 support