Comment 7 for bug 1320217

Actually I think there's a bug here that can still be solved.

Trusty wine1.6 has wine1.6-amd64 and wine1.6-i386 recommend ocl-icd-libopencl1, which provides libopencl1 which the nvidia package in question conflicts with.

Apt will prioritize installing this (even though it's just a recommends) and thus remove the nvidia version of the loader. Things will still work with either loader, but switching is unnecessary and can lead to the confusion in this bug report.

Utopic wine1.6, by contrast, does not have a recommends on ocl-icd-libopencl1 and merely has the (autogenerated) depends on ocl-icd-libopencl1 (>= 1.0) | libopencl1. Apt will consider this satisfied by the already installed nvidia version, and not require an uninstall.