Comment 0 for bug 730488

Binary package hint: xorg

The xf86ScaleAxis function is used to scale x and y axis values of input devices between different resolutions. Due to internal integer overflow, the acceptable value range for its arguments are limited below their type (signed 32bit integer). This imposes a problem for high resolution devices, like the wacom Intuos 4 L, which have a total horizontal resolution of 65024. Example: when doing a scaling with a range of more than 46340 (Sxhigh-Sxlow), the integer X will wrap into negative values, and truncated to 0 at the end.

Among other devices, this problem affects wacom Intuos 4 L and XL tablets when compiling the xf86-input-wacom driver version 0.10.9 and above. Previous versions work, because they don't use the xf86ScaleAxis function. With current xorg releases this problem does not happen either, because a upstream patch (http://lists.x.org/archives/xorg-devel/2010-April/007333.html) already extends the acceptable value range. A solution would be to include this patch into 10.04, because there is still quite a time till the next LTS.

If there is a chance for getting this patch included into 10.04 I'm willing to make a patch specific for the current xorg-server-1.7.6 package and test it.