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Synaptics uses anisotropic coordinate system. On some wide touchpads vertical resolution can be twice as high as horizontal which causes unequal sensitivity on x/y directions. VertResolution and HorizResolution can be used to set the resolution. The ratio of the values is used to compensate x/y sensitivity. The properties are configured automatically if touchpad reports resolution and if running on linux 2.6.31 or newer. Fixes xorg bug #18351. Signed-off-by: Tero Saarni <tero.saarni@gmail.com> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>