Do not enable the use_tablet flag in qemu, as this breaks the mouse.

fixup_image_for_qemu.py

-#!/usr/bin/env python
-
-# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Makes changes to mounted Chromium OS image to allow it to run with VMs
-
-This script changes two files within the Chromium OS image to let the image
-work with VMs, particularly QEMU
-
-Currently this script does the following,
-1.) Modify the post install script to remove EFI fixup section; the VM's we
-support don't have EFI support anyway and this section of the script needs
-access to the actual device drives
-
-2.) For QEMU/KVM, we change the xorg.conf to remove mouse support and instead
-change it to complete tablet support. This is done to provide better mouse
-response in the VM since tablets work of absolute coordinates while the mouse
-works of relative. In a screen that doesn't support a mouse grab (e.g., VNC),
-relative coordinates can cause the mouse to be flaky
-
-"""
-
-from optparse import OptionParser
-import os
-import stat
-import sys
-
-USAGE = "usage: %prog --mounted_dir=directory --enable_tablet=[true]"
-
-INPUT_SECTION_MARKER = r'Section "InputDevice"'
-SECTION_END_MARKER = r'EndSection'
-
-MOUSE_SECTION_IDENTIFIERS = []
-MOUSE_SECTION_IDENTIFIERS += ['Identifier "Mouse']
-MOUSE_SECTION_IDENTIFIERS += ['Identifier "USBMouse']
-
-REPLACE_USB_MOUSE_PAIR = ('InputDevice "USBMouse" "AlwaysCore"', '')
-XORG_CONF_FILENAME = os.path.join('etc', 'X11', 'xorg.conf')
-
-
-TABLET_DEVICE_CONFIG = """
-Section "InputDevice"
-  Identifier  "Mouse1"
-  Driver      "evdev"
-  Option      "Device" "/dev/input/event2"
-  Option      "CorePointer" "true"
-EndSection
-"""
-
-
-# Modify the xorg.conf file to remove all mouse sections and replace it
-# with ours containing the tablet - note: when running under QEMU, you
-# *need* to specify the -usbdevice tablet option to get the mouse to work
-def FixXorgConf(mount_point):
-  xorg_conf_filename = os.path.join(mount_point, XORG_CONF_FILENAME)
-  f = open(xorg_conf_filename, 'r')
-  xorg_conf = f.read()
-  f.close()
-
-  more_sections = 1
-  last_found = 0
-  while (more_sections):
-    # Find the input section.
-    m1 = xorg_conf.find(INPUT_SECTION_MARKER, last_found)
-    if m1 > -1:
-      m2 = xorg_conf.find(SECTION_END_MARKER, m1)
-      m2 += len(SECTION_END_MARKER)
-      # Make sure the next iteration doesn't rinse/repeat.
-      last_found = m2
-      # Check if this is a mouse section.
-      for ident in MOUSE_SECTION_IDENTIFIERS:
-        if xorg_conf.find(ident, m1, m2) != -1:
-          xorg_conf = xorg_conf[0:m1] + xorg_conf[m2:]
-          last_found -= (m2-m1)
-          break
-    else:
-      more_sections = 0
-
-  xorg_conf = xorg_conf[0:last_found] + TABLET_DEVICE_CONFIG + \
-              xorg_conf[last_found:]
-
-  # Replace UsbMouse with Tablet.
-  xorg_conf = xorg_conf.replace(REPLACE_USB_MOUSE_PAIR[0],
-                                REPLACE_USB_MOUSE_PAIR[1])
-
-  # Write the file back out.
-  f = open(xorg_conf_filename, 'w')
-  f.write(xorg_conf)
-  f.close()
-
-def main():
-  parser = OptionParser(USAGE)
-  parser.add_option('--mounted_dir', dest='mounted_dir',
-                    help='directory where the Chromium OS image is mounted')
-  parser.add_option('--enable_tablet', dest='enable_tablet',
-                    default="true",
-                    help='fixup image for qemu')
-  (options, args) = parser.parse_args()
-
-  if not options.mounted_dir:
-    parser.error("Please specify the mount point for the Chromium OS image");
-  if options.enable_tablet not in ('true', 'false'):
-    parser.error("Please specify either true or false for --enable_tablet")
-
-  if (options.enable_tablet == 'true'):
-    FixXorgConf(options.mounted_dir)
-
-
-if __name__ == '__main__':
-  main()