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Old 03-26-2013, 10:40 PM   #1
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Registered: Sep 2012
Posts: 25

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Touchpad configuration tab disappeared

I have an Acer Aspire E431 and Mint 14 Mate. I always have to re-enable the touchpad after each boot. Until this morning, I had to do ctrl fn f7 to enable it, but when I booted this morning, I discovered that the key combination had mysteriously changed to just fn f7. Also all my touchpad configuration options that I had configured had disappeared, and the touchpad configuration tab under control center/assisstive technologies/mouse was no longer there. Apparently this is the result of an update within the last week (Mar 20 -27) (for lack of any other cause). Does anyone know how to restore the configuration options tab to the Control Center? When I first installed Mint I remember that I had to do something to get the touchpad configuration options to show, but I don't remember what it was. I Tried reinstalling xserver-xorg-input-synaptics to no avail. Is there some other package I should install/reinstall or...? gpointing-device-settings is installed. I noticed that there is no xorg.conf file present under /etc/x11 as what I have read seems to indicate there should be. Something else I noticed is that the touchpad is currently being recognized as "PS/2 Synaptics TouchPad" but several months ago when I was dealing with another touchpad issue, it was recognized as "synPS/2 Synaptics TouchPad". I tried running synclient -l but there is no output from this at all. I tried installing the Synaptiks pacjage, but it says "Touchpad not found". I have read bug reports that suggest that the problem might be the result of a bad kernel update? Here is some information from various terminal commands:

computer@computer-Aspire-E1-431:~$ cat /proc/bus/input/devices

I: Bus=0011 Vendor=0002 Product=0001 Version=0000
N: Name="PS/2 Synaptics TouchPad"
P: Phys=isa0060/serio2/input0
S: Sysfs=/devices/platform/i8042/serio2/input/input15
U: Uniq=
H: Handlers=mouse0 event8 
B: EV=7
B: KEY=70000 0 0 0 0
B: REL=3
computer@computer-Aspire-E1-431:~$ xinput --list
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ PS/2 Synaptics TouchPad                 	id=12	[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)]
    ↳ HD WebCam                               	id=10	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=11	[slave  keyboard (3)]
    ↳ Acer WMI hotkeys                        	id=13	[slave  keyboard (3)]
computer@computer-Aspire-E1-431:~$ xinput --list-props 12
Device 'PS/2 Synaptics TouchPad':
	Device Enabled (132):	1
	Coordinate Transformation Matrix (134):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	Device Accel Profile (254):	0
	Device Accel Constant Deceleration (255):	1.000000
	Device Accel Adaptive Deceleration (256):	1.000000
	Device Accel Velocity Scaling (257):	10.000000
	Device Product ID (249):	2, 1
	Device Node (250):	"/dev/input/event8"
	Evdev Axis Inversion (476):	0, 0
	Evdev Axes Swap (478):	0
	Axis Labels (479):	"Rel X" (142), "Rel Y" (143)
	Button Labels (480):	"Button Left" (135), "Button Middle" (136), "Button Right" (137), "Button Wheel Up" (138), "Button Wheel Down" (139)
	Evdev Middle Button Emulation (481):	0
	Evdev Middle Button Timeout (482):	50
	Evdev Third Button Emulation (483):	0
	Evdev Third Button Emulation Timeout (484):	1000
	Evdev Third Button Emulation Button (485):	3
	Evdev Third Button Emulation Threshold (486):	20
	Evdev Wheel Emulation (487):	0
	Evdev Wheel Emulation Axes (488):	0, 0, 4, 5
	Evdev Wheel Emulation Inertia (489):	10
	Evdev Wheel Emulation Timeout (490):	200
	Evdev Wheel Emulation Button (491):	4
	Evdev Drag Lock Buttons (492):	0

Last edited by onebuck; 03-27-2013 at 09:23 AM. Reason: clean thread by using vbcode tag
Old 03-28-2013, 02:47 AM   #2
LQ Newbie
Registered: Sep 2012
Posts: 25

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If there is no xorg.conf file under /etc/x11/ the touchpad tab doesnt show under assistive technologies/mouse. Since there was none, I added the xorg.conf file with the following information:

tion "InputClass"
Identifier "touchpad"
Driver "synaptics"
MatchIsTouchpad "on"
Option "TapButton1" "1"
Option "TapButton2" "2"
Option "TapButton3" "3"
Option "VertEdgeScroll" "on"
Option "VertTwoFingerScroll" "on"
Option "HorizEdgeScroll" "on"
Option "HorizTwoFingerScroll" "on"
Option "CircularScrolling" "on"
Option "CircScrollTrigger" "2"
Option "EmulateTwoFingerMinZ" "40"
Option "EmulateTwoFingerMinW" "8"
Option "LeftEdge" "1700" # x coord left
Option "RightEdge" "5300" # x coord right
Option "TopEdge" "1700" # y coord top
Option "BottomEdge" "4200" # y coord bottom
Option "FingerLow" "25" # pressure below this level triggers release
Option "FingerHigh" "30" # pressure above this level triggers touch
Option "MaxTapTime" "180" # max time in ms for detecting tap

It's still a mystery why this file disappeared but all is good now!


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