Created attachment 132004
# xinput list --long

On many Dell systems the Synaptics touchpad has the capability to run in both PS/2 and I2C modes.  When running on a modern kernel, the touchpad will run in I2C mode.

When in I2C mode, the 'psmouse' driver is still loaded however, meaning that there are two input devices on the system.  No input flows through the 'psmouse' driver, it's all handled via i2c-hid instead.

Unfortunately, when starting up syndaemon doesn't check which touchpad it's actually attached to.  The login in syndaemon just looks for a touchpad that supports the Synaptics touchpad properties and both of them support these.  This leads to syndaemon not working properly.

Device 'SynPS/2 Synaptics TouchPad':
	Device Enabled (142):	1
	Coordinate Transformation Matrix (144):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	Device Accel Profile (273):	1
	Device Accel Constant Deceleration (274):	2.500000
	Device Accel Adaptive Deceleration (275):	1.000000
	Device Accel Velocity Scaling (276):	12.500000
	Synaptics Edges (297):	1583, 5359, 1371, 4481
	Synaptics Finger (298):	25, 30, 0
	Synaptics Tap Time (299):	180
	Synaptics Tap Move (300):	250
	Synaptics Tap Durations (301):	180, 100, 100
	Synaptics ClickPad (302):	1
	Synaptics Middle Button Timeout (303):	0
	Synaptics Two-Finger Pressure (304):	282
	Synaptics Two-Finger Width (305):	7
	Synaptics Scrolling Distance (306):	-113, -113
	Synaptics Edge Scrolling (307):	0, 0, 0
	Synaptics Two-Finger Scrolling (308):	1, 1
	Synaptics Move Speed (309):	1.000000, 1.750000, 0.035168, 0.000000
	Synaptics Off (310):	2
	Synaptics Locked Drags (311):	0
	Synaptics Locked Drags Timeout (312):	5000
	Synaptics Tap Action (313):	2, 3, 0, 0, 1, 3, 0
	Synaptics Click Action (314):	1, 3, 0
	Synaptics Circular Scrolling (315):	0
	Synaptics Circular Scrolling Distance (316):	0.100000
	Synaptics Circular Scrolling Trigger (317):	0
	Synaptics Circular Pad (318):	0
	Synaptics Palm Detection (319):	0
	Synaptics Palm Dimensions (320):	10, 200
	Synaptics Coasting Speed (321):	20.000000, 50.000000
	Synaptics Pressure Motion (322):	30, 160
	Synaptics Pressure Motion Factor (323):	1.000000, 1.000000
	Synaptics Resolution Detect (324):	1
	Synaptics Grab Event Device (325):	0
	Synaptics Gestures (326):	1
	Synaptics Capabilities (327):	1, 0, 0, 1, 1, 1, 1
	Synaptics Pad Resolution (328):	1, 1
	Synaptics Area (329):	0, 0, 0, 0
	Synaptics Soft Button Areas (330):	3471, 0, 4083, 0, 0, 0, 0, 0
	Synaptics Noise Cancellation (331):	28, 28
	Device Product ID (260):	2, 7
	Device Node (261):	"/dev/input/event6"



Device 'DLL0704:01 06CB:76AE Touchpad':
	Device Enabled (142):	1
	Coordinate Transformation Matrix (144):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	Device Accel Profile (273):	1
	Device Accel Constant Deceleration (274):	2.500000
	Device Accel Adaptive Deceleration (275):	1.000000
	Device Accel Velocity Scaling (276):	12.500000
	Synaptics Edges (297):	48, 1168, 36, 644
	Synaptics Finger (298):	25, 30, 0
	Synaptics Tap Time (299):	180
	Synaptics Tap Move (300):	61
	Synaptics Tap Durations (301):	180, 100, 100
	Synaptics ClickPad (302):	1
	Synaptics Middle Button Timeout (303):	0
	Synaptics Two-Finger Pressure (304):	282
	Synaptics Two-Finger Width (305):	7
	Synaptics Scrolling Distance (306):	-27, -27
	Synaptics Edge Scrolling (307):	0, 0, 0
	Synaptics Two-Finger Scrolling (308):	1, 1
	Synaptics Move Speed (309):	1.000000, 1.750000, 0.143575, 0.000000
	Synaptics Off (310):	0
	Synaptics Locked Drags (311):	0
	Synaptics Locked Drags Timeout (312):	5000
	Synaptics Tap Action (313):	2, 3, 0, 0, 1, 3, 0
	Synaptics Click Action (314):	1, 3, 0
	Synaptics Circular Scrolling (315):	0
	Synaptics Circular Scrolling Distance (316):	0.100000
	Synaptics Circular Scrolling Trigger (317):	0
	Synaptics Circular Pad (318):	0
	Synaptics Palm Detection (319):	0
	Synaptics Palm Dimensions (320):	10, 200
	Synaptics Coasting Speed (321):	20.000000, 50.000000
	Synaptics Pressure Motion (322):	30, 160
	Synaptics Pressure Motion Factor (323):	1.000000, 1.000000
	Synaptics Resolution Detect (324):	1
	Synaptics Grab Event Device (325):	0
	Synaptics Gestures (326):	1
	Synaptics Capabilities (327):	1, 0, 0, 1, 1, 0, 0
	Synaptics Pad Resolution (328):	12, 12
	Synaptics Area (329):	0, 0, 0, 0
	Synaptics Soft Button Areas (330):	608, 0, 557, 0, 0, 0, 0, 0
	Synaptics Noise Cancellation (331):	6, 6
	Device Product ID (260):	1739, 30382
	Device Node (261):	"/dev/input/event15"