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Old 04-11-2005, 07:40 AM   #1
Registered: Mar 2005
Posts: 33

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touchpad scrolling, odd problem

I have an emachine laptop and have gotten my touchpad working. However, scrolling (it is where you move your finger up or down the right side of the touchpad) does not work, by default. The strange part is, when I plug in a usb wireless mouse, the touchpad will gain the scrolling abilities, until I reboot. What can I do to allow it to scroll by default? Many thanks.


I have the synaptics driver installed, and this is my xorg.conf file:

# XFree86 4 configuration created by pyxf86config

Section "ServerLayout"
   Identifier     "Default Layout"
   Screen      0  "Screen0" 0 0
   InputDevice    "Synaptics" "AlwaysCore"
   InputDevice    "Mouse0" "CorePointer"
   InputDevice    "Keyboard0" "CoreKeyboard"

Section "Files"
# RgbPath is the location of the RGB database.  Note, this is the name of the
# file minus the extension (like ".txt" or ".db").  There is normally
# no need to change the default.

# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Red Hat 6.0 and later now use a font server independent of
# the X server to render fonts.

   RgbPath      "/usr/X11R6/lib/X11/rgb"
   FontPath     "unix/:-1"

Section "Module"
   Load  "dbe"
   Load  "extmod"
   Load  "fbdevhw"
   Load  "glx"
   Load  "record"
   Load  "freetype"
   Load  "type1"
   Load  "dri"
   Load  "synaptics"

Section "InputDevice"
# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
#   Option   "Xleds"      "1 2 3"

# To disable the XKEYBOARD extension, uncomment XkbDisable.
#   Option   "XkbDisable"

# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults).  For example, for a non-U.S.
# keyboard, you will probably want to use:
#   Option   "XkbModel"   "pc102"
# If you have a US Microsoft Natural keyboard, you can use:
#   Option   "XkbModel"   "microsoft"
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
#   Option   "XkbLayout"   "de"
# or:
#   Option   "XkbLayout"   "de"
#   Option   "XkbVariant"   "nodeadkeys"
# If you'd like to switch the positions of your capslock and
# control keys, use:
#   Option   "XkbOptions"   "ctrl:swapcaps"
# Or if you just want both to be control, use:
#   Option   "XkbOptions"   "ctrl:nocaps"
   Identifier  "Keyboard0"
   Driver      "kbd"
   Option       "XkbModel" "pc105"
   Option       "XkbLayout" "us"

Section "InputDevice"
   Identifier  "Mouse0"
   Driver      "mouse"
   Option       "Protocol" "auto"
   Option       "Device" "/dev/input/mice"
   Option       "ZAxisMapping" "4 5"
   Option       "Emulate3Buttons" "no"

Section "InputDevice"
  Identifier    "Synaptics"
  Driver        "synaptics"
  Option        "Device"        "/dev/input/mice"
  Option        "Protocol"      "auto-dev"
  Option        "LeftEdge"      "1700"
  Option        "RightEdge"     "5750"
  Option        "TopEdge"       "1700"
  Option        "BottomEdge"    "4200"
  Option        "FingerLow"     "25"
  Option        "FingerHigh"    "30"
  Option        "VertScrollDelta" "100"
  Option        "MinSpeed"      "0.06"
  Option        "MaxSpeed"      "0.12"
  Option        "AccelFactor" "0.0020"
  Option        "SHMConfig"     "off"
#  Option       "Repeater"      "/dev/ps2mouse"
  Option   "Emulate3Buttons" "yes"

Section "Monitor"
   Identifier   "Monitor0"
   VendorName   "Monitor Vendor"
   ModelName    "LCD Panel 1024x768"
   HorizSync    31.5 - 48.5
   VertRefresh  40.0 - 70.0
   Option       "dpms"

Section "Device"
   Identifier  "Videocard0"
   Driver      "radeon"
   VendorName  "Videocard vendor"
   BoardName   "ATI Radeon Mobility U1"

Section "Screen"
   Identifier "Screen0"
   Device     "Videocard0"
   Monitor    "Monitor0"
   DefaultDepth     16
   SubSection "Display"
      Viewport   0 0
      Depth     16
      Modes    "1024x768" "800x600" "640x480"

Section "DRI"
   Group        0
   Mode         0666

Last edited by the_clown; 04-11-2005 at 06:12 PM.
Old 04-12-2005, 10:01 AM   #2
Senior Member
Registered: Sep 2003
Location: Sweden
Distribution: Debian
Posts: 3,032

Rep: Reputation: 58
Chances are you have an ALPS touchpad, not a Synaptics brand one, since eMachines have shipped a lot of portables with this kind of hardware. The ALPS touchpads require a kernel <= 2.6.11 or the ALPS patch that comes with the Synaptics driver package. Many distributions ship their kernels with this patch applied so it might only be a case of configuring X correctly. Refer to README.alps in the Synaptics package.

If you want more information on configuring and using an ALPS touchpad, you can refer to the R3000 Wiki ALPS page.

Old 04-12-2005, 08:10 PM   #3
Registered: Mar 2005
Posts: 33

Original Poster
Rep: Reputation: 15
Okay, after also posting in the gentoo forums, I got it working. Its not an alps, it really is a synaptics. The problem was evdev was not configured in the kernel, so setting my system to load the evdev module at boot fixed my problem.


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