set brightness, catch exceptions

old-commit-hash: 0d02e85873

selfdrive/hardware/tici/hardware.py

@@ -185,5 +185,8 @@ class Tici(HardwareBase):
     return ThermalConfig(cpu=((1, 2, 3, 4, 5, 6, 7, 8), 1000), gpu=((48,49), 1000), mem=(15, 1000), bat=(None, 1), ambient=(65, 1000))
 
   def set_screen_brightness(self, percentage):
+    try:
       with open("/sys/class/backlight/panel0-backlight/brightness", "w") as f:
         f.write(str(percentage * 10.23))
+    except Exception:
+      pass

selfdrive/ui/qt/home.cc

@@ -2,6 +2,8 @@
 #include <fstream>
 #include <iostream>
 #include <thread>
+#include <exception>
+
 
 #include <QDateTime>
 #include <QHBoxLayout>
@@ -191,11 +193,15 @@ static void handle_display_state(UIState* s, bool user_input) {
 }
 
 static void set_backlight(int brightness) {
+  try {
     std::ofstream brightness_control("/sys/class/backlight/panel0-backlight/brightness");
     if (brightness_control.is_open()) {
       brightness_control << brightness << "\n";
       brightness_control.close();
     }
+  } catch (std::exception& e) {
+    qDebug() << "Error setting brightness";
+  }
 }
 
 GLWindow::GLWindow(QWidget* parent) : QOpenGLWidget(parent) {