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The results depend on the data rate of the device. A device with a higher data rate, and thus lower individual deltas, will behave differently with the regression calculation. This can be verified on Synaptics semi-mt clickpads. The data rate is halved when two or more touches are on the device. When trying to press a button and drag the cursor with another touch, the motion will feel faster than dragging with only one touch on the device. Signed-off-by: Chase Douglas <chase.douglas@canonical.com> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
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