Hi @seth,

First off, thanks for the patch, it works like a charm on my DELL Latitude E6510.

I just acquired a Dell Precision M6400. The default Mouse and Touchpad settings don't give me the possibility to deactivate the touchapd alltogether, so I installed your patch from comment #492. But it does not seem to install correctly: no gpointing-device-settings binary is available...

Here are the hardware details:
* uname -a:
Linux mt-lap-04 3.0.0-13-generic #22-Ubuntu SMP Wed Nov 2 13:27:26 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

* xinput list
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ DualPoint Stick                         	id=13	[slave  pointer  (2)]
⎜   ↳ AlpsPS/2 ALPS DualPoint TouchPad        	id=14	[slave  pointer  (2)]
⎜   ↳ MLK Trust Mouse 16536                   	id=11	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Video Bus                               	id=7	[slave  keyboard (3)]
    ↳ Power Button                            	id=8	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=9	[slave  keyboard (3)]
    ↳ Laptop_Integrated_Webcam_FHD            	id=10	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=12	[slave  keyboard (3)]
    ↳ Dell WMI hotkeys                        	id=15	[slave  keyboard (3)]

* lspci 
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:16.3 Serial controller: Intel Corporation 6 Series/C200 Series Chipset Family KT Controller (rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
00:1a.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b4)
00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b4)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b4)
00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b4)
00:1d.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation QM67 Express Chipset Family LPC Controller (rev 04)
00:1f.2 RAID bus controller: Intel Corporation Mobile 82801 SATA RAID Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: nVidia Corporation GF108 [Quadro 1000M] (rev a1)
01:00.1 Audio device: nVidia Corporation GF108 High Definition Audio Controller (rev a1)
03:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
0a:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04)
0b:00.0 FireWire (IEEE 1394): O2 Micro, Inc. OZ600 1394a-2000 Controller (rev 05)
0b:00.1 SD Host controller: O2 Micro, Inc. Device 8320 (rev 05)
0b:00.2 Mass storage controller: O2 Micro, Inc. Device 8330 (rev 05)

If there's any more information you require, just let me know how I can provide it to you.

Thanks,
Steven

P.S.: Just found a python script that allows me to disable/enable the touchpad using Fn+F5: http://forums.fedoraforum.org/showthread.php?p=1526462 so it's not urgent, maybe not even necessary to have your patch work on the DELL Prescision M6400...