Re: [DIGImend-users] Bizarre Tablet Issues Return

[Favux ... <fav...@gm...>]

Sorry, should have shown details:
$ patch -p2 < 0001-dix-undo-transformation-for-missing-valuators-49347.patch
patching file getevents.c
Hunk #1 succeeded at 1146 (offset -21 lines).

And now the function looks like (other than the indents):
/**
 * Apply the device's transformation matrix to the valuator mask and replace
 * the scaled values in mask. This transformation only applies to valuators
 * 0 and 1, others will be untouched.
 *
 * @param dev The device the valuators came from
 * @param[in,out] mask The valuator mask.
 */
static void
transformAbsolute(DeviceIntPtr dev, ValuatorMask *mask)
{
    double x, y, ox, oy;

    if (!valuator_mask_isset(mask, 0) || !valuator_mask_isset(mask, 1)) {
        struct pixman_f_transform invert;

        /* undo transformation from last event */
        ox = dev->last.valuators[0];
        oy = dev->last.valuators[1];

        pixman_f_transform_invert(&invert, &dev->transform);
        transform(&invert, &ox, &oy);

        x = ox;
        y = oy;
    }

    if (valuator_mask_isset(mask, 0))
        ox = x = valuator_mask_get_double(mask, 0);

    if (valuator_mask_isset(mask, 1))
        oy = y = valuator_mask_get_double(mask, 1);

    transform(&dev->transform, &x, &y);

    if (valuator_mask_isset(mask, 0) || ox != x)
        valuator_mask_set_double(mask, 0, x);

    if (valuator_mask_isset(mask, 1) || oy != y)
        valuator_mask_set_double(mask, 1, y);
}