The update works great on my Samsung RC512 running Linux 2.6.38.11-generic.
Wobble is essentially gone.
Here is some of the output of dmesg:

[ 9620.220811] elantech: assuming hardware version 3, firmware version
69.15.0
[ 9620.256879] elantech: Synaptics capabilities query result 0x08, 0x15,
0x0c.
[ 9620.336893] elantech: x_max = 2508, y_max = 1320
[ 9620.352890] input: ETPS/2 Elantech Touchpad as
/devices/platform/i8042/serio1/input/input11

On Tue, Aug 23, 2011 at 8:57 AM, Seth Forshee <email address hidden>wrote:

> I've posted an update to the driver, this time just as a dkms package.
> It's avaiable at
>
> http://people.canonical.com/~sforshee/lp681904/psmouse-elantech-
> dkms/v0.1/psmouse-elantech-dkms_0.1_all.deb
>
> Please test and let me know how it works. Thanks!
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/681904
>
> Title:
>  [arrandale] Samsung
>  QX310/QX410/QX510/SF310/SF410/SF510/NF210/RF410/RF510/RF511/RF710
>  trackpad/touchpad not recognized
>
> Status in The Linux Kernel:
>  Confirmed
> Status in X.org xf86-video-intel:
>  New
> Status in “linux” package in Ubuntu:
>  Incomplete
> Status in “xserver-xorg-video-intel” package in Ubuntu:
>  Invalid
>
> Bug description:
>  Ubuntu 10.10, Samsung NP-QX410.  Trackpad settings not available.  Can
>  use trackpad, can use left and right click, but no options available
>  to adjust settings.  Personally having issue of rubbing trackpad while
>  I type and it is very annoying.
>
>  The trackpad is recognized as a "PS/2 Logitech Wheel Mouse". No side
>  scrolling, no disabling tap-to-click (annoying!) and no other trackpad
>  settings available.
>
>  How to reproduce:
>  1) install ubuntu on a samsung qx410
>  2) try, try, try and fail to make the touchpad work properly
>  ---
>  Architecture: amd64
>  DRM.card0.DisplayPort.1:
>   status: disconnected
>   enabled: disabled
>   dpms: On
>   modes:
>   edid-base64:
>  DRM.card0.HDMI_Type_A.1:
>   status: disconnected
>   enabled: disabled
>   dpms: On
>   modes:
>   edid-base64:
>  DRM.card0.LVDS.1:
>   status: connected
>   enabled: enabled
>   dpms: On
>   modes: 1366x768
>   edid-base64:
> AP///////wBMo1AyAAAAAAAUAQOAHxF4Cgnll1dUiiciUFQAAAABAQEBAQEBAQEBAQEBAQEBhBtWeFAAFjAwICUANa4QAAAZAAAADwAAAAAAAAAAAB60AnQAAAAA/gBTQU1TVU5HCiAgICAgAAAA/gBMVE4xNDBBVDE3ODAxANw=
>  DRM.card0.VGA.1:
>   status: disconnected
>   enabled: disabled
>   dpms: On
>   modes:
>   edid-base64:
>  DistroRelease: Ubuntu 10.10
>  DkmsStatus:
>
>  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64
> (20101007)
>  MachineType: SAMSUNG ELECTRONICS CO., LTD.
> QX310/QX410/QX510/SF310/SF410/SF510
>  Package: xorg 1:7.5+6ubuntu3
>  PackageArchitecture: amd64
>  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-23-generic
> root=UUID=75a97d0d-7483-4000-8519-03687885d9ea ro quiet splash
>  ProcEnviron:
>   PATH=(custom, user)
>   LANG=en_US.UTF-8
>   SHELL=/bin/bash
>  ProcVersionSignature: Ubuntu 2.6.35-23.40-generic 2.6.35.7
>  Tags: maverick maverick
>  Uname: Linux 2.6.35-23-generic x86_64
>  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
>  dmi.bios.date: 09/14/2010
>  dmi.bios.vendor: American Megatrends Inc.
>  dmi.bios.version: 02MX.M003.20100914.SCY
>  dmi.board.asset.tag: To be filled by O.E.M.
>  dmi.board.name: QX310/QX410/QX510/SF310/SF410/SF510
>  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
>  dmi.board.version: 02MX
>  dmi.chassis.asset.tag: No Asset Tag
>  dmi.chassis.type: 9
>  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
>  dmi.chassis.version: N/A
>  dmi.modalias:
> dmi:bvnAmericanMegatrendsInc.:bvr02MX.M003.20100914.SCY:bd09/14/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnQX310/QX410/QX510/SF310/SF410/SF510:pvr02MX:rvnSAMSUNGELECTRONICSCO.,LTD.:rnQX310/QX410/QX510/SF310/SF410/SF510:rvr02MX:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
>  dmi.product.name: QX310/QX410/QX510/SF310/SF410/SF510
>  dmi.product.version: 02MX
>  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
>  glxinfo: Error: [Errno 2] No such file or directory
>  system:
>   distro:             Ubuntu
>   codename:           maverick
>   architecture:       x86_64
>   kernel:             2.6.35-23-generic
>
>
>  [lspci]
>  00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor
> Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA
> controller])
>        Subsystem: Samsung Electronics Co Ltd Device [144d:c08b]
>
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