Load LLVMpipe GL driver in Chromoting desktop session

remoting/host/linux/linux_me2me_host.py

 #!/usr/bin/python
 # 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.
 
 # Virtual Me2Me implementation.  This script runs and manages the processes
 # required for a Virtual Me2Me desktop, which are: X server, X desktop
 # session, and Host process.
 # This script is intended to run continuously as a background daemon
 # process, running under an ordinary (non-root) user account.
 
 import atexit
 import errno
 import fcntl
 import getpass
 import grp
 import hashlib
 import json
 import logging
 import optparse
 import os
 import pipes
+import platform
 import psutil
 import platform
 import signal
 import socket
 import subprocess
 import sys
 import tempfile
 import time
 import uuid
 
@@ skipping 214 matching lines @@
         "LANG",
         "LOGNAME",
         "PATH",
         "SHELL",
         "USER",
         "USERNAME",
         LOG_FILE_ENV_VAR]:
       if os.environ.has_key(key):
         self.child_env[key] = os.environ[key]
 
+    # Ensure that the software-rendering GL drivers are loaded by the desktop
+    # session, instead of any hardware GL drivers installed on the system.
+    self.child_env["LD_LIBRARY_PATH"] = (
+        "/usr/lib/%(arch)s-linux-gnu/mesa:"
+        "/usr/lib/%(arch)s-linux-gnu/dri:"
+        "/usr/lib/%(arch)s-linux-gnu/gallium-pipe" %
+        { "arch": platform.machine() })
+
     # Read from /etc/environment if it exists, as it is a standard place to
     # store system-wide environment settings. During a normal login, this would
     # typically be done by the pam_env PAM module, depending on the local PAM
     # configuration.
     env_filename = "/etc/environment"
     try:
       with open(env_filename, "r") as env_file:
         for line in env_file:
           line = line.rstrip("\n")
           # Split at the first "=", leaving any further instances in the value.
@@ skipping 958 matching lines @@
         else:
           logging.info("Host exited with status %s." % os.WEXITSTATUS(status))
       elif os.WIFSIGNALED(status):
         logging.info("Host terminated by signal %s." % os.WTERMSIG(status))
 
 
 if __name__ == "__main__":
   logging.basicConfig(level=logging.DEBUG,
                       format="%(asctime)s:%(levelname)s:%(message)s")
   sys.exit(main())