Hi guys, Recently I've been having some difficulties with my touchpad. I do a lot of electronics design work, and this often requires making small precise movements with the pointer.
Just recently though, this has been much harder - I've found myself getting frustrated with the CAD package, and I'd started to think my touchpad was broken... (so I started investigating). It definitely seemed that I was unable to persuade the touchpad to produce smooth motions of a small number of pixels. I tried drawing some circles using the touchpad, and they would come out with flattened edges. I found that by setting the "Synaptics Noise Cancellation" property using "xinput", I was able to restore "correct" behaviour. I guess the default setting is picking up a default which is not well suited to my laptop (HP 6730b) hardware. Any pointers (no pun intended) you can suggest to investigate why the default is inappropriate on my system would be great. I'll try to follow up with what the default _is_ on this box when I next reboot. For now, I've been fixing the issue with: xinput set-int-prop 11 313 32 10 10 So I don't have the old setting readily to hand. (I did attach the current settings. I've only modified the noise cancellation one). Thanks -- Peter Clifton <pc...@cam.ac.uk>
Device 'SynPS/2 Synaptics TouchPad':
Device Enabled (152): 1
Coordinate Transformation Matrix (154): 1.000000, 0.000000, 0.000000,
0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (274): 1
Device Accel Constant Deceleration (275): 2.500000
Device Accel Adaptive Deceleration (276): 1.000000
Device Accel Velocity Scaling (277): 12.500000
Synaptics Edges (278): 1758, 5274, 1643, 4543
Synaptics Finger (279): 25, 30, 256
Synaptics Tap Time (280): 180
Synaptics Tap Move (281): 233
Synaptics Tap Durations (282): 180, 180, 100
Synaptics Tap FastTap (283): 0
Synaptics Middle Button Timeout (284): 75
Synaptics Two-Finger Pressure (285): 282
Synaptics Two-Finger Width (286): 7
Synaptics Scrolling Distance (287): 105, 105
Synaptics Edge Scrolling (288): 1, 0, 0
Synaptics Two-Finger Scrolling (289): 0, 0
Synaptics Move Speed (290): 1.000000, 1.750000, 0.037757, 40.000000
Synaptics Edge Motion Pressure (291): 30, 160
Synaptics Edge Motion Speed (292): 1, 423
Synaptics Edge Motion Always (293): 0
Synaptics Off (294): 0
Synaptics Locked Drags (295): 0
Synaptics Locked Drags Timeout (296): 5000
Synaptics Tap Action (297): 2, 3, 0, 0, 1, 3, 2
Synaptics Click Action (298): 1, 1, 1
Synaptics Circular Scrolling (299): 0
Synaptics Circular Scrolling Distance (300): 0.100000
Synaptics Circular Scrolling Trigger (301): 0
Synaptics Circular Pad (302): 0
Synaptics Palm Detection (303): 0
Synaptics Palm Dimensions (304): 10, 200
Synaptics Coasting Speed (305): 20.000000, 50.000000
Synaptics Pressure Motion (306): ... of unknown type
CARDINAL
Synaptics Pressure Motion Factor (307): 1.000000, 1.000000
Synaptics Grab Event Device (308): 1
Synaptics Gestures (309): 1
Synaptics Capabilities (310): 1, 0, 1, 0, 0, 1, 1
Synaptics Pad Resolution (311): 100, 53
Synaptics Area (312): 0, 0, 0, 0
Synaptics Noise Cancellation (313): 10, 10
Device Product ID (272): 2, 7
Device Node (273): "/dev/input/event7"
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