Intel's Core i7 5775C Broadwell Is Running Well On Ubuntu 15.10
For some of the OpenGL tests, Ubuntu 15.10 with the Core i7 5775C is a little bit faster than the older kernel and Mesa build in Fedora 22, but for the most part the performance is the same. Most importantly though is that Ubuntu is now running stable for this Broadwell system.
More of these test results from this OpenBenchmarking.org result file.