Disable GPU features if /dev/nvidiactl is inaccessible

content/gpu/gpu_main.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
@@ skipping 63 matching lines @@
   bool dead_on_arrival = false;
 
   // Load and initialize the GL implementation and locate the GL entry points.
   content::GPUInfo gpu_info;
   if (gfx::GLSurface::InitializeOneOff()) {
     // Collect information about the GPU.
     if (!gpu_info_collector::CollectGraphicsInfo(&gpu_info)) {
       LOG(INFO) << "gpu_info_collector::CollectGraphicsInfo failed";
     }
 
+#if defined(OS_LINUX)
+    if (gpu_info.vendor_id == 0x10de) {  // NVIDIA
+      base::ThreadRestrictions::AssertIOAllowed();
+      if (access("/dev/nvidiactl", R_OK) != 0) {
+        LOG(INFO) << "NVIDIA device file /dev/nvidiactl access denied";
+        gpu_info.gpu_accessible = false;
+        dead_on_arrival = true;
+      }
+    }
+#endif
+
     // Set the GPU info even if it failed.
     content::GetContentClient()->SetGpuInfo(gpu_info);
   } else {
     LOG(INFO) << "gfx::GLSurface::InitializeOneOff failed";
+    gpu_info.gpu_accessible = false;
     dead_on_arrival = true;
   }
 
   base::win::ScopedCOMInitializer com_initializer;
 
 #if defined(OS_WIN)
   // Preload this DLL because the sandbox prevents it from loading.
   LoadLibrary(L"setupapi.dll");
 
   // Cause advapi32 to load before the sandbox is turned on.
@@ skipping 34 matching lines @@
   child_thread->Init(start_time);
 
   gpu_process.set_main_thread(child_thread);
 
   main_message_loop.Run();
 
   child_thread->StopWatchdog();
 
   return 0;
 }