Touchpad/Testing
< Touchpad
Revision as of 02:09, 2 February 2012 by Martinlanghoff (talk | contribs) (Created page with 'Touchpad calibration and testing is a complex area, not very well documented in the industry. This page collects useful information when testing and debugging touchpads. OLPC ha…')
Touchpad calibration and testing is a complex area, not very well documented in the industry. This page collects useful information when testing and debugging touchpads.
OLPC has shipped 3 touchpads
- ALPS (in XO-1 CL1 model)
- Synaptics (in XO-1 CL1A model, XO-1.5, XO-1.75)
- Sentelic AVC (in XO-1 CL1A model, XO-1.5, XO-1.75)
Right after boot, use "dmesg | grep -i psmouse" to see what protocol is in use. This usually reveals the tp in use.
Contents
Tests
Standing finger
- Place your finger in one spot, keep it there for a long time. The pointer should not move.
Circles
Spirals
Rolling finger
Corner to corner sweep
Variables
- Dirty power --
- Approach speed
- Firmness of touch
- Hand placement
- Lap vs table
- Humidity and temperature
- Wet finger
- Finger size
- Dust
- User variation
