diff --git a/telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py b/telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py
index <HASH>..<HASH> 100644
--- a/telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py
+++ b/telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py
@@ -202,6 +202,9 @@ class PossibleDesktopBrowser(possible_browser.PossibleBrowser):
           self.CleanUpEnvironment()
           self.SetUpEnvironment(saved_browser_options)
         else:
+          logging.warning('This might be because of software compositing being'
+                          ' disabled. Please try again with'
+                          ' --allow-software-compositing flag.')
           raise
 
   def GetBrowserStartupArgs(self, browser_options):
Added a warning for software compositing flag

In cases with software compositing disabled, the browser connection will
be lost and the story runner would fail with error. A warning is added
in this cases to suggest enabling software compositing.

Bug: chromium:<I>
Change-Id: I8a<I>f<I>eee<I>f3f<I>d4b<I>d<I>
Reviewed-on: <URL>