xorg-conf: optimized xorg.conf settings for xf86-input-synaptics on mario mp.

chromeos-base/xorg-conf/files/xorg.conf-0.0.4

 # 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.
 
 # Setting up things manually here lets us avoid HAL overhead.
 # TODO: Per-device xorg.conf rather than this one generic version.
 Section "ServerFlags"
     Option "AutoAddDevices" "false"
     Option "DontZap" "false"
 EndSection
 
 Section "InputDevice"
     Identifier "Keyboard1"
     Driver     "kbd"
     Option     "AutoRepeat" "250 30"
     Option     "XkbRules"   "xorg"
     Option     "XkbModel"   "pc105"  # supports volume keys; pc104 doesn't
     Option     "CoreKeyboard"
 EndSection
 
 Section "InputDevice"
     Identifier "Mouse1"
     Driver     "synaptics"
     Option     "SendCoreEvents" "true"
     Option     "Protocol" "auto-dev"
     Option     "SHMConfig" "on"
     Option     "CorePointer"
-    Option     "MinSpeed" "0.4"
-    Option     "MaxSpeed" "1.0"
-    Option     "AccelFactor" "0.0035"
+
+    Option     "FingerLow" "40"
+    Option     "FingerHigh" "43"
+    Option     "MaxTapTime" "150"
+    Option     "MaxTapMove" "50"
+    Option     "MaxDoubleTapTime" "150"
+    Option     "SingleTapTimeout" "150"
+    Option     "EmulateTwoFingerMinZ" "50"

[tv, 2011/02/22 22:52:35]

If this behavior is desired, this value seems a little too low to me. I can
trigger the emulation (resulting in a scroll) simply by letting too much of my
finger, or the side of my thumb, onto the pad. I have a big build, but not huge
hands; I can imagine this could cause trouble for people who are notably
overweight, or have a health condition causing hand swelling.

+    Option     "VertScrollDelta" "7"
     Option     "HorizScrollDelta" "6"
-    Option     "VertScrollDelta" "18"
     Option     "HorizEdgeScroll" "0"
     Option     "VertEdgeScroll" "0"
+    Option     "VertTwoFingerScroll" "1"
+    Option     "HorizTwoFingerScroll" "0"
+    Option     "MinSpeed" "0.4"
+    Option     "MaxSpeed" "1.9"

[tv, 2011/02/27 00:39:36]

This is definitely much more usable than the default of 1.0. Maybe a little too
much on the high end, but of course it's adjustable.

This needs to be coupled with a change to
/opt/google/touchpad/tpcontrol_synclient that provides a different gradient in
maximum speeds (as its highest MaxSpeed is currently still 1.0).

+    Option     "AccelFactor" "0.045"
+    Option     "EdgeMotionMaxSpeed" "1"
     Option     "TapButton1" "1"
     Option     "TapButton2" "3"
     Option     "TapButton3" "2"
-    Option     "MaxTapTime" "180"
-    Option     "FingerLow" "40"
-    Option     "FingerHigh" "43"
-    Option     "EmulateTwoFingerMinZ" "32"
-    Option     "VertTwoFingerScroll" "1"
-    # Horizontal scrolling is disabled for now as it interferes w/ vertical.
-    Option     "HorizTwoFingerScroll" "0"
-    # The resolutions were balanced for the Dell Latitudes
-    Option     "HorizResolution" "75"
-    Option     "VertResolution" "108"
+    Option     "PalmDetect" "1"
+    Option     "PalmMinWidth" "5"

[tv, 2011/02/22 22:52:35]

The palm detection seems to work OK from a few hours of testing, though similar
comments to EmulateTwoFingerMinZ apply here. If I use the flat side of my middle
or ring finger tips, it's really easy to trigger palm-detect (and the pointer
stops dead).

+    Option     "PalmMinZ" "120"
+    Option     "CoastingSpeed" "255"
+    Option     "CoastingFriction" "50"
+    Option     "AreaLeftEdge" "1375"
+    Option     "AreaRightEdge" "5550"
+    Option     "AreaTopEdge" "1250"
+    Option     "AreaBottomEdge" "4600"
 EndSection
 
 # Include support for USB as a secondary mouse device.
 Section "InputDevice"
     Identifier "USBMouse"
     Driver     "mouse"
     Option     "Device" "/dev/input/mice" # multiplexed HID mouse input device
     Option     "Protocol" "IMPS/2"
     Option     "ZAxisMapping" "8 9" # support a wheel as buttons 8 and 9
     Option     "Emulate3Buttons" "true"  # just in case it is a 2 button
@@ skipping 14 matching lines @@
     Device     "DefaultDevice"
 EndSection
 
 Section "ServerLayout"
     Identifier  "DefaultLayout"
     Screen      "DefaultScreen"
     InputDevice "Mouse1" "CorePointer"
     InputDevice "USBMouse" "AlwaysCore"
     InputDevice "Keyboard1" "CoreKeyboard"
 EndSection