We have had exactly the same problem here (and reported it several
times). The mouse is working up to version 1.1.87, but some serial
driver changes in 1.1.88 broke the C&T chip autodetection. The quick and
dirty fix back then was to bypass autodection (i.e. bypass calling
probe_qp) and force installation.
What were the changes that broke C&T chip autodetection? It looks like
the C&T stuff does something really gross with spare registers in the
COM ports, but I'm not an expert on the C&T chip.
If someone can tell me what needs to be avoided to make C&T
autodetection work, I can either fold that into the serial driver to
make things work. In the worse case, if a really ugly hack is required
that will make the serial driver less functional for other folks, the
changes can go in #ifdef'ed under CONFIG_82C710 mouse....