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513534c
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(Get the code!)
I use a MEDL trackball which uses the old mousesystems protocol.
HAL detection will not work as there is nothing to detect. I followed the advice of the above post with no success, and another which reproduced the entire relevant mouse section from my old xorg.conf. To no avail, the parameters I had supplied were appended to the emulated "Macintosh button mouse" device.
A solution for the myriad of upgrading users out here is to re-enable 'Mouse' driver sections in xorg.conf. This is disabled in the HAL driven xorg editions since 9.04. One must add the line:-
Option "AllowEmptyInput" "false"
in the ServerLayout section.
This still allows the auto detection of HAL devices but allows the inclusion of manual entries in xorg.conf.
Many users with serial mice have had to resort to editing xorg.conf and this restores that possibility.